John Quatannens, MD
NPI 1265504088 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Quatannens, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1265504088).
Provider details
- NPI number
- 1265504088
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A88939 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 91 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 510 | 158 |
| Lisinopril | 176 | 55 |
| Amlodipine Besylate | 172 | 59 |
| Rosuvastatin Calcium | 172 | 58 |
| Losartan Potassium | 148 | 47 |
| Metformin Hclbrand: Metformin Hcl Er | 142 | 45 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-15
- Last updated
- 2022-01-06
Frequently asked questions
- What is John Quatannens's NPI number?
- John Quatannens's National Provider Identifier (NPI) is 1265504088, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Quatannens's specialty?
- John Quatannens is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Quatannens located?
- John Quatannens's practice location on file with NPPES is 2200 Ofarrell St, San Francisco, CA 94115-3357.
- What is John Quatannens's phone number?
- The practice phone number listed in the NPPES registry for John Quatannens is (415) 833-2000.
- Does John Quatannens accept Medicare?
- John Quatannens is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Quatannens's NPI active?
- Yes — John Quatannens's NPI (1265504088) is active in the NPPES registry as of the last update on 2022-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.