Martin Greenfield, MD
NPI 1205831443 · Endocrinology, Diabetes & Metabolism Physician · New Hyde Park, NY
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martin Greenfield, MD is a Endocrinology, Diabetes & Metabolism Physician provider in New Hyde Park, NY (NPI 1205831443).
Provider details
- NPI number
- 1205831443
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 103688 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 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
3,530 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 | 788 | $145 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 422 | $9 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 325 | $16 |
| Thyroxine (thyroid Chemical), Free84439 | 320 | $9 |
| Hemoglobin A1c Level83036 | 288 | $9 |
| Thyroid Hormone, T3 Measurement, Total84480 | 271 | $14 |
| Blood Test, Comprehensive Group of Blood Chemicals |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 68 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodiumbrand: Synthroid | 348 | 88 |
| Empagliflozinbrand: Jardiance | 318 | 79 |
| Levothyroxine Sodium | 280 | 87 |
| Metformin Hclbrand: Metformin Hcl Er | 265 | 84 |
| Metformin Hcl | 236 | 73 |
| Semaglutidebrand: Ozempic | 197 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$34 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
- 2005-06-15
- Last updated
- 2011-04-06
Frequently asked questions
- What is Martin Greenfield's NPI number?
- Martin Greenfield's National Provider Identifier (NPI) is 1205831443, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martin Greenfield's specialty?
- Martin Greenfield is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Martin Greenfield located?
- Martin Greenfield's practice location on file with NPPES is 2 Pro Health Plz, New Hyde Park, NY 11042-1111.
- What is Martin Greenfield's phone number?
- The practice phone number listed in the NPPES registry for Martin Greenfield is (516) 608-6823.
- Does Martin Greenfield accept Medicare?
- Martin Greenfield is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martin Greenfield's NPI active?
- Yes — Martin Greenfield's NPI (1205831443) is active in the NPPES registry as of the last update on 2011-04-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.