Harry Gruenspan, MD
NPI 1649349010 · Endocrinology, Diabetes & Metabolism Physician · New York, NY
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harry Gruenspan, MD is a Endocrinology, Diabetes & Metabolism Physician provider in New York, NY (NPI 1649349010).
Provider details
- NPI number
- 1649349010
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 152555 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
802 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 213 | $143 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 204 | $9 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 131 | $16 |
| Thyroxine (thyroid Chemical), Free84439 | 122 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 26 | $97 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 22 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metformin Hcl | 137 | 39 |
| Levothyroxine Sodium | 129 | 32 |
| Ezetimibe | 113 | 35 |
| Atorvastatin Calcium | 106 | 29 |
| Rosuvastatin Calcium | 105 | 31 |
| Telmisartan | 80 | 17 |
| Semaglutidebrand: Ozempic | 76 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-07
- Last updated
- 2016-06-21
Frequently asked questions
- What is Harry Gruenspan's NPI number?
- Harry Gruenspan's National Provider Identifier (NPI) is 1649349010, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harry Gruenspan's specialty?
- Harry Gruenspan is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Harry Gruenspan located?
- Harry Gruenspan's practice location on file with NPPES is 210 E 86th St, New York, NY 10028-3141.
- What is Harry Gruenspan's phone number?
- The practice phone number listed in the NPPES registry for Harry Gruenspan is (212) 794-2900.
- Does Harry Gruenspan accept Medicare?
- Harry Gruenspan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harry Gruenspan's NPI active?
- Yes — Harry Gruenspan's NPI (1649349010) is active in the NPPES registry as of the last update on 2016-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.