Medicare Enrolled
Dr. Ratnasabapathy Sivasekaran, MD
Internal Medicine · Ocala, FL
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Sivasekaran from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Sivasekaran?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Sivasekaran
Dr. Ratnasabapathy Sivasekaran is an internal medicine specialist in Ocala, FL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Sivasekaran performed 27,056 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Sivasekaran received a total of $2,991 from 40 pharmaceutical and/or device companies across 140 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Sivasekaran is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years of NPI registration
▲ Top 1% volume in FL
$2,991 industry payments
Florida License Status
FL DOH · MQA1
Active license
None
Board action on record
0
Recent admin complaints
| Profession | License # | Status | Expires | Board Action |
|---|---|---|---|---|
| Medical Doctor | 90344 | Clear | January 31, 2028 | — |
Data from Florida Department of Health Medical Quality Assurance.
License records are public under Chapter 119, Florida Statutes.
Verify directly on FL DOH →
Medicare Practice Summary — 2023
Medicare Utilization ↗27,056
Medicare services
Top 1% in FL for internal medicine
Not available
Unique patients (not deduplicated)
$43
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
4,563 | $94 | $213 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
1,415 | $66 | $148 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
1,196 | $137 | $413 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
1,071 | $62 | $180 |
| Apolipoprotein level test A blood test that measures the amount of apolipoproteins, which are proteins that bind to lipids to form lipoproteins. This test helps evaluate the levels of specific proteins involved in fat transport in the blood. |
1,042 | $21 | $40 |
| Hospital discharge management, 30+ min This service covers the care provided by a physician or qualified healthcare professional on the day a patient is discharged from the hospital. It requires more than 30 minutes of total time spent on the day of discharge. |
722 | $90 | $218 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
634 | $6 | $6 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
606 | $8 | $25 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
549 | $10 | $36 |
| Free T3 thyroid hormone test A blood test that measures the level of free triiodothyronine (T3) hormone in your body. This helps assess how well your thyroid gland is functioning. |
541 | $17 | $50 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
540 | $16 | $46 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
538 | $13 | $37 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
538 | $10 | $27 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
537 | $9 | $25 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
535 | $15 | $42 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
535 | $14 | $41 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
533 | $13 | $40 |
| Iron binding capacity test A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron. |
532 | $9 | $24 |
| Iron level test | 530 | $6 | $18 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
530 | $7 | $18 |
| Cardiac enzyme level (CK-MB) test A blood test that measures the total level of creatine kinase, specifically the cardiac enzyme fraction, to help evaluate heart muscle damage. |
529 | $6 | $18 |
| Insulin level test A blood test that measures the total amount of insulin in your body. |
527 | $11 | $31 |
| C-peptide level test A blood test that measures the amount of C-peptide, a protein produced along with insulin, to help evaluate insulin production and diabetes management. |
527 | $20 | $53 |
| Lactate dehydrogenase (LDH) level test A blood test that measures the amount of lactate dehydrogenase, an enzyme found in many body tissues. It helps assess tissue damage or disease. |
524 | $6 | $20 |
| Uric acid level test A blood test that measures the level of uric acid in your body. Uric acid is a waste product formed when the body breaks down purines. |
524 | $4 | $15 |
| Phosphate level test A blood test that measures the amount of phosphate in your body. Phosphate is a mineral that helps keep bones and teeth strong. |
520 | $5 | $13 |
| Homocysteine level test A blood test that measures the amount of homocysteine, an amino acid, in the body. |
511 | $18 | $46 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
508 | $10 | $32 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
497 | $1 | $4 |
| Urine microalbumin test A laboratory test that measures the amount of a specific protein called microalbumin in a urine sample. This analysis helps assess kidney function. |
487 | $6 | $20 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
403 | $29 | $81 |
| Parathyroid hormone level test A blood test that measures the amount of parathyroid hormone in your body. This hormone helps regulate calcium levels in the blood and bones. |
376 | $40 | $107 |
| C-reactive protein test (inflammation marker) A blood test that measures the level of C-reactive protein to detect the presence of infection or inflammation in the body. |
320 | $5 | $15 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
217 | $11 | $34 |
| Follicle stimulating hormone (FSH) level A blood test to measure the level of follicle stimulating hormone, a reproductive hormone. |
196 | $18 | $48 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
170 | $126 | $233 |
| High-sensitivity C-reactive protein test A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation. |
167 | $13 | $40 |
| Initial nursing facility care, high complexity An initial visit by a healthcare provider to a patient in a nursing facility involving a high level of medical decision making, lasting at least 45 minutes. |
156 | $142 | $338 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
124 | $78 | $336 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
117 | $30 | $41 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
113 | $115 | $299 |
| Total cortisol level test A blood test that measures the total amount of cortisol hormone in your body. Cortisol is a hormone produced by the adrenal glands. |
109 | $16 | $41 |
| Total testosterone level test A blood test that measures the total amount of testosterone in your body. This hormone is important for various bodily functions in both men and women. |
109 | $25 | $68 |
| Total estradiol level test A blood test that measures the total amount of estradiol, a form of estrogen, in the body. |
108 | $27 | $78 |
| Luteinizing hormone level test A blood test that measures the level of luteinizing hormone, a reproductive hormone. This test helps evaluate hormonal balance and reproductive function. |
108 | $18 | $49 |
| Sex hormone binding globulin level test A blood test that measures the level of sex hormone binding globulin, a protein that binds to sex hormones in the bloodstream. |
108 | $21 | $29 |
| Progesterone level test A blood test that measures the amount of progesterone, a reproductive hormone, in your body. |
107 | $20 | $56 |
| Prolactin level test A blood test that measures the amount of prolactin, a hormone produced by the pituitary gland that stimulates milk production, in the body. |
107 | $19 | $52 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
105 | $76 | $123 |
| Nursing facility visit, moderate complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves moderate medical decision making and takes at least 30 minutes. |
100 | $78 | $184 |
| Smoking cessation counseling, 4-10 minutes A brief counseling session focused on helping patients quit smoking and tobacco use. The provider spends 4 to 10 minutes discussing strategies and support for cessation. |
87 | $15 | $31 |
| Dehydroepiandrosterone (DHEA) hormone level test This test measures the level of dehydroepiandrosterone (DHEA) hormone in the blood. DHEA is a hormone produced by the adrenal glands. |
85 | $25 | $40 |
| Ultrasound of leg arteries or grafts An imaging test that uses sound waves to create pictures of the blood vessels in the legs or any surgical grafts present. |
79 | $154 | $385 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
71 | $100 | $179 |
| Kidney function blood test panel | 66 | $9 | $26 |
| Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts A complete ultrasound exam of the aorta, vena cava, groin vessels, or bypass grafts. This imaging test uses sound waves to visualize these blood vessels. |
62 | $85 | $283 |
| Transitional care management, high complexity Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem. |
61 | $212 | $470 |
| Automated urinalysis An automated laboratory test performed on a urine sample to analyze its chemical and physical properties. The procedure uses machinery to detect various substances and cells within the urine. |
52 | $2 | $15 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
52 | $18 | $43 |
| Influenza virus detection test A laboratory test that uses an immunoassay technique to detect the presence of the influenza virus through direct visual observation. |
46 | $16 | $31 |
| Home health plan of care certification Certification by a physician or allowed practitioner for Medicare-covered home health services under a home health plan of care. This includes contacting the home health agency and reviewing reports of patient status required by physicians. |
38 | $38 | $81 |
| PSA test (prostate cancer screening) | 36 | $18 | $52 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
27 | $114 | $330 |
| DHEA-S hormone level test A blood test that measures the level of dehydroepiandrosterone sulfate (DHEA-S), a hormone produced by the adrenal glands. |
24 | $22 | $45 |
| Annual wellness visit, initial visit A yearly appointment to review your health and create a personalized prevention plan. This initial visit focuses on preventive care and health assessment. |
22 | $162 | $350 |
| Transitional care management services, moderate complexity Services provided to coordinate care during the transition from an inpatient or other facility setting back to the community. This includes follow-up and management of a health problem of at least moderate complexity. |
20 | $159 | $335 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
14 | $8 | $22 |
| Strep A rapid test A rapid test to detect Group A Streptococcus bacteria using an immunoassay method with direct visual observation. |
14 | $16 | $31 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
14 | $140 | $290 |
| 2-day continuous ECG with review and report A two-day continuous electrocardiogram recording that includes a professional review and written report of the results. |
13 | $52 | $173 |
| Quadrivalent influenza vaccine, cell culture-derived A flu shot that protects against four strains of the influenza virus. It is produced using cell culture technology rather than traditional egg-based methods. |
12 | $32 | $69 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
0.7% high complexity
4.4% medium
94.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$2,991
Total received (2018-2024)
Avg $427/year across 7 years
Top 20% in FL for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
40
Companies
140
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$115
2023
$172
2022
$253
2021
$863
2020
$203
2019
$245
2018
$1,140
Payments by company (2024)
Abbott Laboratories
$38
AstraZeneca Pharmaceuticals LP
$31
PFIZER INC.
$25
Sumitomo Pharma America, Inc.
$21
Top 3 companies account for 82.0% of 2024 payments
All-time payments by company (2018-2024) ›
Janssen Pharmaceuticals, Inc
$400
Boehringer Ingelheim Pharmaceuticals, Inc.
$353
Lilly USA, LLC
$234
Allergan Inc.
$197
Astellas Pharma US Inc
$157
GlaxoSmithKline, LLC.
$146
Novartis Pharmaceuticals Corporation
$127
Stryker Corporation
$125
Melinta Therapeutics, Inc.
$116
AstraZeneca Pharmaceuticals LP
$110
PORTOLA PHARMACEUTICALS, INC.
$98
Amgen Inc.
$79
Sunovion Pharmaceuticals Inc.
$76
PFIZER INC.
$67
Abbott Laboratories
$67
SUN PHARMACEUTICAL INDUSTRIES INC.
$62
AbbVie Inc.
$53
Eisai Inc.
$50
Exact Sciences Corporation
$49
Novo Nordisk Inc
$44
Bayer HealthCare Pharmaceuticals Inc.
$36
Sun Pharmaceutical Industries Inc.
$25
Mylan Specialty L.P.
$24
Medtronic, Inc.
$22
Hikma Pharmaceuticals USA
$21
Eyevance Pharmaceuticals LLC
$21
Sumitomo Pharma America, Inc.
$21
Grifols USA, LLC
$20
Allergan, Inc.
$19
Scilex Pharmaceuticals Inc.
$18
Radius Health, Inc.
$18
Kowa Pharmaceuticals America, Inc.
$18
Daiichi Sankyo Inc.
$18
Supernus Pharmaceuticals, Inc.
$17
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$16
Horizon Therapeutics plc
$14
Sanofi Pasteur Inc.
$14
ABBVIE INC.
$14
Strongbridge US INC.
$14
Biogen, Inc.
$11
Top 3 companies account for 33.0% of all-time payments
Associated products mentioned in payments ›
APTIOM · Aimovig · BASAGLAR · BEVYXXA · CHANTIX · Cologuard Collection Kit · DALVANCE · DUEXIS · Dayvigo · EMGALITY · ENTRESTO · ETERNA · EVUSHELD · FARXIGA · FLUZONE HIGH-DOSE · FreeStyle Libre · GEMTESA · INVOKANA · InPen · JARDIANCE · KAPSPARGO · KEVEYIS · Kerendia · LINZESS · LOKELMA · Livalo · MAKO · MOUNJARO · MYRBETRIQ · Mitigare · Morphabond ER · Myrbetriq · OXBRYTA · Orbactiv · Otezla · Ozempic · PROCLAIM · Prolastin-C Liquid · QULIPTA · Repatha · STIOLTO RESPIMAT · TRADJENTA · TRELEGY ELLIPTA · TROKENDI XR · TRULICITY · Tobradex ST · Tymlos · UBRELVY · UTIBRON · VRAYLAR · XARELTO · XIFAXAN · Yupelri · ZTLido 30 POUCH in 1 CARTON 1 PATCH in 1 POUCH
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Internal medicine physicians in nearby ZIP areas
240
County median income
$58,535
Nearest hospital to ZIP centroid (approximate)
MARION COMMUNTIY HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Sivasekaran is a mixed practice specialist, with above-average Medicare volume (top 1% in FL), with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Sivasekaran experienced with hospital follow-up visit, high complexity?
Based on Medicare claims data, Dr. Sivasekaran performed 4,563 hospital follow-up visit, high complexity services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Sivasekaran receive payments from pharmaceutical companies?
Yes. Dr. Sivasekaran received a total of $2,991 from 40 companies across 140 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Sivasekaran's costs compare to other internal medicine physicians in Ocala?
Dr. Sivasekaran's average Medicare payment per service is $43. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Sivasekaran) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
Explore related providers
Same specialty & city
Internal Medicine Physicians in Ocala
Browse internal medicine physicians in Ocala ranked by procedure volume and transparency data.
Highest volume
Top Internal Medicine Physicians in FL
Internal medicine physicians ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Internal Medicine Physicians in FL
Which FL internal medicine physicians receive the most from drug and device companies.
By company
Janssen Pharmaceuticals, Inc Payments to Doctors
See all physicians who received payments from Janssen Pharmaceuticals, Inc.
By company
Boehringer Ingelheim Pharmaceuticals, Inc. Payments to Doctors
See all physicians who received payments from Boehringer Ingelheim Pharmaceuticals, Inc.
By company
Lilly USA, LLC Payments to Doctors
See all physicians who received payments from Lilly USA, LLC.
About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology