Medicare Enrolled
Dr. Mark Gelfand, MD
Internal Medicine · Brooklyn, NY
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. Gelfand 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 →
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What this data tells you about Dr. Gelfand
Dr. Mark Gelfand is an internal medicine specialist in Brooklyn, NY, with 20 years of NPI registration. Based on federal Medicare data, Dr. Gelfand performed 25,786 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Gelfand received a total of $4,541 from 34 pharmaceutical and/or device companies across 229 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. Gelfand 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 NY
$4,541 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗25,786
Medicare services
Top 1% in NY for internal medicine
Not available
Unique patients (not deduplicated)
$21
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 |
|---|---|---|---|
| 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. |
1,885 | $76 | $150 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,422 | $8 | $51 |
| 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. |
1,129 | $8 | $12 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,058 | $10 | $16 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
1,054 | $13 | $27 |
| Amylase enzyme level test A blood test that measures the amount of amylase, an enzyme produced by the pancreas and salivary glands, to help evaluate pancreatic health. |
1,047 | $6 | $13 |
| Iron level test | 1,044 | $6 | $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. |
1,044 | $9 | $20 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
1,043 | $7 | $16 |
| 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. |
1,041 | $6 | $10 |
| 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. |
1,041 | $4 | $12 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
1,029 | $10 | $14 |
| Glutamyltransferase (GGT) level test A blood test that measures the level of the liver enzyme glutamyltransferase (GGT) to help evaluate liver health. |
1,005 | $7 | $10 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
948 | $15 | $125 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
947 | $14 | $100 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
885 | $16 | $24 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
873 | $9 | $25 |
| Total T3 thyroid hormone test A blood test that measures the total amount of triiodothyronine (T3) hormone in your body. T3 is a thyroid hormone that helps regulate metabolism and energy levels. |
873 | $14 | $20 |
| High-sensitivity C-reactive protein test A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation. |
773 | $13 | $19 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
767 | $13 | $16 |
| 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. |
680 | $5 | $40 |
| 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. |
669 | $12 | $87 |
| 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. |
368 | $2 | $15 |
| Advance care planning consultation, first 30 min A session focused on discussing and documenting future healthcare preferences and goals. This service covers the initial 30 minutes of the planning discussion. |
354 | $94 | $140 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
318 | $149 | $185 |
| 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. |
314 | $100 | $187 |
| Microsomal antibody test A blood test that measures the level of microsomal antibodies, which are autoantibodies produced by the immune system. |
217 | $14 | $219 |
| Thyroglobulin antibody blood test A blood test that measures the level of antibodies against thyroglobulin, a protein produced by the thyroid gland. |
217 | $16 | $199 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
159 | $29 | $250 |
| Ear probe test for repeated sounds A probe is placed in the ear to measure how the ear responds to repeated sounds. The results are interpreted and a report is provided. |
158 | $22 | $200 |
| PSA test (prostate cancer screening) | 142 | $18 | $26 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
141 | $98 | $388 |
| Insulin level test A blood test that measures the total amount of insulin in your body. |
123 | $11 | $65 |
| 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. |
110 | $174 | $350 |
| 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. |
103 | $12 | $50 |
| 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. |
102 | $92 | $400 |
| Annual alcohol misuse screening, 5 to 15 minutes | 96 | $22 | $80 |
| Annual depression screening | 90 | $22 | $86 |
| Influenza vaccine, quadrivalent, 0.5 ml dosage | 63 | $20 | $75 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
63 | $36 | $50 |
| Bone density scan (DEXA) of forearm, finger, hand, or foot A DEXA scan measures bone mineral density in the forearm, finger, hand, or foot. This test helps assess bone strength and risk of fracture. |
58 | $38 | $450 |
| 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. |
56 | $25 | $36 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
48 | $49 | $97 |
| 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. |
44 | $6 | $55 |
| 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. |
38 | $191 | $225 |
| 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. |
27 | $231 | $400 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
27 | $48 | $140 |
| 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. |
24 | $137 | $265 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
22 | $99 | $323 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
20 | $105 | $188 |
| Ultrasound of abdominal aorta An imaging test that uses sound waves to create pictures of the abdominal aorta, the large blood vessel that carries blood from the heart to the lower body. |
16 | $128 | $435 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
11 | $182 | $385 |
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.
Industry Payment Transparency
Open Payments through 2024 ↗$4,541
Total received (2018-2024)
Avg $649/year across 7 years
Top 17% in NY for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
34
Companies
229
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
$620
2023
$645
2022
$775
2021
$738
2020
$409
2019
$678
2018
$675
Payments by company (2024)
ABBVIE INC.
$220
GlaxoSmithKline, LLC.
$91
Bayer Healthcare Pharmaceuticals Inc.
$77
AstraZeneca Pharmaceuticals LP
$67
Lilly USA, LLC
$52
Azurity Pharmaceuticals, Inc.
$50
Merck Sharp & Dohme LLC
$42
E.R. Squibb & Sons, L.L.C.
$20
Top 3 companies account for 62.7% of 2024 payments
All-time payments by company (2018-2024) ›
GlaxoSmithKline, LLC.
$970
ABBVIE INC.
$431
AbbVie Inc.
$374
Bayer Healthcare Pharmaceuticals Inc.
$246
AbbVie, Inc.
$234
Amarin Pharma Inc.
$225
E.R. Squibb & Sons, L.L.C.
$206
Bayer HealthCare Pharmaceuticals Inc.
$191
Amgen Inc.
$183
Novartis Pharmaceuticals Corporation
$173
AstraZeneca Pharmaceuticals LP
$161
Azurity Pharmaceuticals, Inc.
$115
Takeda Pharmaceuticals U.S.A., Inc.
$106
ARBOR PHARMACEUTICALS, INC.
$98
PFIZER INC.
$94
Arbor Pharmaceuticals, Inc.
$92
Boehringer Ingelheim Pharmaceuticals, Inc.
$92
Lilly USA, LLC
$75
Nestle HealthCare Nutrition Inc.
$64
Allergan Inc.
$57
Merck Sharp & Dohme LLC
$42
Regeneron Healthcare Solutions, Inc.
$36
Allergan, Inc.
$36
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$33
SANOFI-AVENTIS U.S. LLC
$32
Janssen Pharmaceuticals, Inc
$25
NESTLE HEALTHCARE NUTRITION INC.
$23
IBSA Pharma Inc.
$22
Esperion Therapeutics, Inc.
$20
Novo Nordisk Inc
$20
Ironwood Pharmaceuticals, Inc
$19
Amneal Pharmaceuticals LLC
$18
Synergy Pharmaceuticals Inc
$17
Circassia Pharmaceuticals Inc
$12
Top 3 companies account for 39.1% of all-time payments
Associated products mentioned in payments ›
ANORO · ANORO ELLIPTA · APRISO · AVSOLA · Aimovig · Amitiza · BREZTRI · BYSTOLIC · CAMZYOS · CHANTIX · CREON · EDARBI · ELIQUIS · ENTRESTO · Edarbi · Edarbyclor · FARXIGA · HORIZANT · Horizant · JARDIANCE · Kerendia · LAGEVRIO · LEQVIO · LICART · LINZESS · LYRICA · Linzess · MAVYRET · MOTEGRITY · MOUNJARO · Mavyret · Motegrity · NEXLETOL · Otezla · Ozempic · PRADAXA · PRALUENT · PRALUENT ALIROCUMAB INJECTION · Repatha · SHINGRIX · STIOLTO RESPIMAT · SYNTHROID · Synthroid · TRADJENTA · TRELEGY ELLIPTA · TUDORZA PRESSAIR · Trulance · UBRELVY · UNITHROID · VIBERZI · Vascepa · XARELTO · XIFAXAN · ZENPEP
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
10,307
County median income
$78,548
Nearest hospital to ZIP centroid (approximate)
SOUTH BROOKLYN HEALTH
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. Gelfand is a mixed practice specialist, with above-average Medicare volume (top 1% in NY), 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. Gelfand experienced with office visit, established patient (20-29 min)?
Based on Medicare claims data, Dr. Gelfand performed 1,885 office visit, established patient (20-29 min) 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. Gelfand receive payments from pharmaceutical companies?
Yes. Dr. Gelfand received a total of $4,541 from 34 companies across 229 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. Gelfand's costs compare to other internal medicine physicians in Brooklyn?
Dr. Gelfand's average Medicare payment per service is $21. 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. Gelfand) 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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