Geeti Mahajan, M.D.
Endocrinology, Diabetes & Metabolism Physician · Brooklyn, NY
Geeti Mahajan, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Brooklyn, New York, and NPI 1538320510, issued on Jun 22, 2008. Check the license (New York 309583, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Geeti Mahajan
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 309583 NY
25MA10543800 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 4802 10TH Ave FL 3, Brooklyn, NY 11219
- Phone
- (718) 283-5923
- Enumerated
- Jun 22, 2008
- Record last updated
- Feb 4, 2026
- Fax
- (718) 283-8498
- Medicare enrollment
- Enrolled (PECOS I20210721000527); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 970 in New York → Look up another NPI →
Also registered at 4802 10TH Ave FL 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shenouty Beshara, PA-CPhysician Assistant1891416756
Verify Geeti Mahajan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 309583Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
884 Medicare Part D claims for 132 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Ozempic110 claims
- Metformin Hcl98 claims
- Repaglinide72 claims
- Levothyroxine Sodium69 claims
- Mounjaro42 claims
- Januvia37 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $188.38
2 payments; by number, the most common kind was food and beverage; the largest payer was Sanofi-Aventis U.S. LLC. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Maimonides Faculty Practice PlanBrooklyn, NY
- Maimonides Medical Center - Division OF Endocrinology FppBrooklyn, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Geeti Mahajan among 970 endocrinology, diabetes & metabolism physician records in New York
Geeti Mahajan, M.D. is one of 970 endocrinology, diabetes & metabolism physician records with a practice address in New York. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 51% of them.
- NPI issued2008 · 51% of these records are older, 43% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2006 · median 2004 among the 694 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in New York
There are 970 endocrinology, diabetes & metabolism physician records in New York.
All 970 in New York → Every provider in Brooklyn → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Alan Brickman, M.D.Brooklyn, NY 112191104917343
- Jocelyne Karam, MDBrooklyn, NY 112191982894978
- Tiffany Lu, DOBrooklyn, NY 112191255969077
- Luba Rakhlin, M.D.Brooklyn, NY 112191548569320
- Christine Resta, M.D.,F.A.C.P.Brooklyn, NY 112191134104854
- Moin Sattar, MDBrooklyn, NY 112191124554613
- Joshua ShapiroBrooklyn, NY 112191063090546
- Ying Chen, MDBrooklyn, NY 112201497384960
Common questions
What is Geeti Mahajan, M.D.'s NPI number?
Geeti Mahajan, M.D.'s National Provider Identifier (NPI) is 1538320510, issued on Jun 22, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Geeti Mahajan, M.D. located?
The NPPES record lists a practice address at 4802 10TH Ave FL 3, Brooklyn, NY, 11219. Phone: (718) 283-5923. Providers update this record themselves, so call before visiting.
How can I verify Geeti Mahajan, M.D.'s license?
NPPES lists New York license number 309583, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Geeti Mahajan, M.D. prescribe under Medicare Part D?
In 2024, Geeti Mahajan, M.D. had 884 Medicare Part D claims for 132 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.