John Gian, M.D.
NPI 1316931520 · Internal Medicine Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Gian, M.D. is a Internal Medicine Physician provider in Brooklyn, NY (NPI 1316931520).
Provider details
- NPI number
- 1316931520
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 223263-1 (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
20 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
21 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 21 | $9 |
Typical Medicare-allowed amounts for these services range $9–$9 (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 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 148 | 44 |
| Losartan Potassium | 95 | 24 |
| Metformin Hcl | 79 | 20 |
| Amlodipine Besylate | 75 | 20 |
| Acarbose | 59 | 17 |
| Rosuvastatin Calcium | 51 | 13 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-02
- Last updated
- 2015-04-21
Frequently asked questions
- What is John Gian's NPI number?
- John Gian's National Provider Identifier (NPI) is 1316931520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Gian's specialty?
- John Gian is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Gian located?
- John Gian's practice location on file with NPPES is 760 Broadway, Brooklyn, NY 11206.
- What is John Gian's phone number?
- The practice phone number listed in the NPPES registry for John Gian is (718) 963-8000.
- Does John Gian accept Medicare?
- John Gian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Gian's NPI active?
- Yes — John Gian's NPI (1316931520) is active in the NPPES registry as of the last update on 2015-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.