Medicare Enrolled
Dr. Khai Chang, MD
Internal Medicine · Mount Dora, 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. Chang 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. Chang?
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What this data tells you about Dr. Chang
Dr. Khai Chang is an internal medicine specialist in Mount Dora, FL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Chang performed 14,268 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Chang received a total of $5,622 from 58 pharmaceutical and/or device companies across 325 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. Chang 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 2% volume in FL
$5,622 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 | 75650 | Clear | January 31, 2027 | — |
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 ↗14,268
Medicare services
Top 2% in FL for internal medicine
Not available
Unique patients (not deduplicated)
$25
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 |
|---|---|---|---|
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,350 | $8 | $10 |
| 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. |
1,349 | $89 | $195 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,105 | $10 | $20 |
| 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. |
1,100 | $8 | $15 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
946 | $13 | $25 |
| LDL cholesterol level test A blood test that measures the amount of low-density lipoprotein (LDL) cholesterol in your blood. LDL is often referred to as "bad" cholesterol. |
946 | $10 | $20 |
| Manual urinalysis with microscopic examination A urine test performed manually without automated equipment. The sample is examined under a microscope to check for abnormalities. |
868 | $4 | $5 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
695 | $16 | $30 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
632 | $1 | $5 |
| Hemoglobin analysis by chromatography A laboratory test that uses chromatography to separate and measure different types of hemoglobin in the blood. |
499 | $18 | $30 |
| 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. |
435 | $10 | $25 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
340 | $30 | $40 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
329 | $9 | $15 |
| Urine microalbumin test (kidney screening) A laboratory test that measures the amount of microalbumin, a small protein, in a urine sample. This test is used to detect early signs of kidney damage. |
298 | $6 | $10 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
294 | $5 | $10 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
286 | $1 | $5 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
284 | $75 | $100 |
| 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. |
203 | $64 | $140 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
180 | $29 | $45 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
171 | $15 | $25 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
145 | $4 | $10 |
| Anticoagulant management for warfarin Management of anticoagulant therapy for a patient taking warfarin. This service involves monitoring and adjusting the medication regimen. |
132 | $8 | $20 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
107 | $30 | $35 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
103 | $48 | $100 |
| Pneumococcal vaccine, 23-valent A vaccine that protects against 23 types of pneumococcal bacteria. It is used to prevent infections caused by these bacteria. |
102 | $131 | $180 |
| Injection, methylprednisolone acetate, 40 mg | 98 | $6 | $10 |
| PSA test (prostate cancer screening) A blood test that measures the level of prostate-specific antigen to screen for prostate cancer. |
92 | $19 | $30 |
| Adm sarscv2 bvl 50mcg/.5ml a | 86 | $39 | $40 |
| 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. |
69 | $2 | $5 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
69 | $16 | $35 |
| 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. |
65 | $135 | $275 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
64 | $80 | $170 |
| 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. |
64 | $11 | $25 |
| Influenza vaccine, quadrivalent, 0.5 ml dosage | 56 | $20 | $30 |
| PSA test (prostate cancer screening) | 53 | $18 | $30 |
| Ultrasound of head and neck soft tissue This procedure uses sound waves to create images of the soft tissues in the head and neck area. It allows for the visualization of structures beneath the skin without using radiation. |
40 | $85 | $175 |
| 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. |
40 | $40 | $65 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
37 | $8 | $15 |
| 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. |
36 | $103 | $255 |
| Overnight continuous oxygen level test This test measures oxygen levels in the blood continuously overnight using a device attached to the ear or finger. |
33 | $18 | $40 |
| 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. |
30 | $5 | $10 |
| SARS-CoV-2 immunoassay test A laboratory test using immunoassay techniques to detect the presence of severe acute respiratory syndrome coronavirus. |
30 | $35 | $70 |
| Natriuretic peptide level test A blood test that measures the level of natriuretic peptide, a protein produced by the heart and blood vessels. |
29 | $38 | $60 |
| Drug screening test A laboratory test that uses a chemistry analyzer to detect the presence of drugs in a sample. |
28 | $61 | $110 |
| Influenza virus detection test A laboratory test that uses an immunoassay technique to detect the presence of the influenza virus through direct visual observation. |
28 | $16 | $25 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
28 | $129 | $300 |
| 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. |
28 | $38 | $100 |
| 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. |
24 | $211 | $415 |
| Complete blood count (CBC), automated An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood. |
23 | $6 | $40 |
| Sed rate test (inflammation marker) This automated test measures how quickly red blood cells settle in a tube to detect inflammation in the body. |
23 | $3 | $5 |
| Sleep study in sleep lab (age 6+) An overnight test conducted in a sleep laboratory to monitor sleep patterns and bodily functions in patients aged 6 years or older. |
21 | $461 | $900 |
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
20 | $35 | $75 |
| Manual white blood cell count A laboratory test that involves examining a sample under a microscope to manually count the number of white blood cells present. |
19 | $4 | $15 |
| Blood glucose level test A test that measures the amount of sugar in your blood. |
18 | $4 | $10 |
| 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. |
18 | $9 | $15 |
| Joint fluid aspiration or injection, medium joint Removal of fluid from a medium-sized joint or injection of medication into the joint space. |
17 | $36 | $85 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
17 | $7 | $15 |
| COVID-19 immunoassay detection test A laboratory test that uses an immunoassay method to detect the presence of severe acute respiratory syndrome coronavirus 2 (COVID-19) through direct visual observation. |
15 | $41 | $65 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
14 | $14 | $25 |
| Sleep study with continuous airway pressure, age 6+ A sleep study conducted in a sleep lab that monitors breathing and other body functions while administering continuous airway pressure. This test is performed on patients aged 6 years or older. |
14 | $474 | $940 |
| Suture or staple removal Removal of stitches or staples from a wound or incision site. |
12 | $9 | $20 |
| Post-glucose dose blood sugar level A blood test to measure glucose levels after a dose of glucose has been administered. |
11 | $5 | $10 |
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.
0.2% high complexity
11.7% medium
88.1% routine
Industry Payment Transparency
Open Payments through 2024 ↗$5,622
Total received (2018-2024)
Avg $803/year across 7 years
Top 12% in FL for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
58
Companies
325
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
$490
2023
$1,012
2022
$766
2021
$1,042
2020
$639
2019
$961
2018
$712
Payments by company (2024)
Phathom Pharmaceuticals, Inc.
$76
Sumitomo Pharma America, Inc.
$61
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$53
Exact Sciences Corporation
$40
PFIZER INC.
$34
ABBVIE INC.
$33
Inspire Medical Systems, Inc.
$25
Boehringer Ingelheim Pharmaceuticals, Inc.
$24
Merck Sharp & Dohme LLC
$22
Bioventus LLC
$21
Novartis Pharmaceuticals Corporation
$20
Novo Nordisk Inc
$19
GlaxoSmithKline, LLC.
$18
Abbott Laboratories
$15
AstraZeneca Pharmaceuticals LP
$14
Amgen Inc.
$14
Top 3 companies account for 38.6% of 2024 payments
All-time payments by company (2018-2024) ›
Novartis Pharmaceuticals Corporation
$820
GlaxoSmithKline, LLC.
$548
Astellas Pharma US Inc
$465
Novo Nordisk Inc
$434
AbbVie Inc.
$245
Janssen Pharmaceuticals, Inc
$220
Amgen Inc.
$204
Lilly USA, LLC
$179
AstraZeneca Pharmaceuticals LP
$174
Welch Allyn
$165
Sunovion Pharmaceuticals Inc.
$155
Amarin Pharma Inc.
$152
Teva Pharmaceuticals USA, Inc.
$146
PFIZER INC.
$120
Sumitomo Pharma America, Inc.
$107
Exact Sciences Corporation
$93
Horizon Pharma plc
$76
Phathom Pharmaceuticals, Inc.
$76
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$61
Scilex Pharmaceuticals Inc.
$57
Supernus Pharmaceuticals, Inc.
$55
Ultragenyx Pharmaceutical Inc.
$55
Esperion Therapeutics, Inc.
$55
Neurocrine Biosciences, Inc.
$55
SANOFI PASTEUR INC.
$54
Merck Sharp & Dohme LLC
$53
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$53
ABBVIE INC.
$52
Horizon Therapeutics plc
$50
Allergan, Inc.
$40
Biogen, Inc.
$40
Bayer HealthCare Pharmaceuticals Inc.
$36
Boston Scientific Corporation
$36
IDORSIA PHARMACEUTICALS US INC
$35
Bioventus LLC
$34
DEXCOM, INC.
$30
Kowa Pharmaceuticals America, Inc.
$26
Inspire Medical Systems, Inc.
$25
Allergan Inc.
$25
ARBOR PHARMACEUTICALS, INC.
$24
Smith+Nephew, Inc.
$24
Boehringer Ingelheim Pharmaceuticals, Inc.
$24
Eisai Inc.
$22
Baxter Healthcare
$20
Penumbra, Inc.
$19
Vanda Pharmaceuticals Inc.
$17
Otsuka America Pharmaceutical, Inc.
$16
GE HealthCare
$15
Mylan Specialty L.P.
$15
Novavax Inc
$15
Abbott Laboratories
$15
Biosense Webster, Inc.
$14
MILLICENT US INC
$14
Xeris Pharmaceuticals, Inc.
$13
Valeritas, Inc.
$13
Hologic, LLC
$12
E.R. Squibb & Sons, L.L.C.
$12
Sanofi Pasteur Inc.
$11
Top 3 companies account for 32.6% of all-time payments
Associated products mentioned in payments ›
ADJUVANTED · ADUHELM · AIMOVIG · AJOVY · ANORO · ANORO ELLIPTA · AREXVY · AUSTEDO · AVYCAZ · Age based codes · Aimovig · Austedo XR · BREATHTEK · BREZTRI · BRILINTA · CAPVAXIVE · CHANTIX · COLLAGENASE SANTYL · Carto 3 System · Cologuard Collection Kit · Crysvita · Cryvista · DEXCOM G6 TRANSMITTER · DUROLANE · Durolane · ELIQUIS · EMGALITY · ENTRESTO · EVENITY · Edarbi · Edarbyclor · FARXIGA · FLUBLOK QUADRIVALENT · FLUZONE HIGH-DOSE · FLUZONE QUADRIVALENT NORTHERN HEMISPHERE · FREESTYLE LIBRE 3 · Femring · GEMTESA · GVOKE HYPOPEN · Hetlioz · Hillrom - Carnation Ambulatory Monitor · INGREZZA · INSPIRE · INVOKANA · Indigo System · KRYSTEXXA · Kerendia · LEQVIO · LYRICA · Leqembi · LifeVest · Livalo · MOUNJARO · MYRBETRIQ · Myrbetriq · NEXLETOL · NOVAVAX COVID-19 VACCINE · None · Otezla · Ozempic · PNEUMOVAX 23 · PREVNAR 20 · Prolia · QULIPTA · QUVIVIQ · Repatha · Rybelsus · SHINGRIX · SYMBICORT · TRELEGY ELLIPTA · TROKENDI XR · TRULICITY · Tresiba · UBRELVY · V-GO · VOQUEZNA · VRAYLAR · Vascepa · Victoza · WATCHMAN FLX · XARELTO · XIFAXAN · Yupelri · ZTLido
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
1,172
County median income
$69,956
Nearest hospital to ZIP centroid (approximate)
ADVENTHEALTH WATERMAN
6.0 mi
6.0 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. Chang is a mixed practice specialist, with above-average Medicare volume (top 2% 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. Chang experienced with blood draw (venipuncture)?
Based on Medicare claims data, Dr. Chang performed 1,350 blood draw (venipuncture) 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. Chang receive payments from pharmaceutical companies?
Yes. Dr. Chang received a total of $5,622 from 58 companies across 325 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. Chang's costs compare to other internal medicine physicians in Mount Dora?
Dr. Chang's average Medicare payment per service is $25. 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. Chang) 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 →
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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.
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