Geeti Mahajan, M.D.
NPI 1538320510 · Endocrinology, Diabetes & Metabolism Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Geeti Mahajan, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Brooklyn, NY (NPI 1538320510).
Provider details
- NPI number
- 1538320510
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 25MA10543800 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
174 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 74 | $146 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 62 | $87 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 24 | $146 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 14 | $191 |
Typical Medicare-allowed amounts for these services range $87–$191 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 110 | 25 |
| Metformin Hcl | 98 | 26 |
| Repaglinide | 72 | 21 |
| Levothyroxine Sodium | 69 | 19 |
| Tirzepatidebrand: Mounjaro | 42 | 13 |
| Sitagliptin Phosphatebrand: Januvia | 37 | — |
| Alcohol Antiseptic Pads |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$188 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-22
- Last updated
- 2026-02-04
- Certified
- 2026-02-04
Frequently asked questions
- What is Geeti Mahajan's NPI number?
- Geeti Mahajan's National Provider Identifier (NPI) is 1538320510, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Geeti Mahajan's specialty?
- Geeti Mahajan is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Geeti Mahajan located?
- Geeti Mahajan's practice location on file with NPPES is 4802 10th Ave Fl 3, Brooklyn, NY 11219-2916.
- What is Geeti Mahajan's phone number?
- The practice phone number listed in the NPPES registry for Geeti Mahajan is (718) 283-5923.
- Does Geeti Mahajan accept Medicare?
- Geeti Mahajan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Geeti Mahajan's NPI active?
- Yes — Geeti Mahajan's NPI (1538320510) is active in the NPPES registry as of the last update on 2026-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.