Stephen Ong, M.D.
NPI 1780750018 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Ong, M.D. is a Internal Medicine Physician provider in San Francisco, CA (NPI 1780750018).
Provider details
- NPI number
- 1780750018
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A93783 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 35 | 20 |
| Metoprolol Succinate | 31 | 19 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 30 | 17 |
| Furosemide | 19 | 17 |
| Amiodarone Hcl | 17 | 13 |
| Losartan Potassium | 16 | — |
| Oxycodone Hcl | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-28
- Last updated
- 2021-12-09
Frequently asked questions
- What is Stephen Ong's NPI number?
- Stephen Ong's National Provider Identifier (NPI) is 1780750018, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Ong's specialty?
- Stephen Ong is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Ong located?
- Stephen Ong's practice location on file with NPPES is 2425 Geary Blvd, San Francisco, CA 94115-3358.
- What is Stephen Ong's phone number?
- The practice phone number listed in the NPPES registry for Stephen Ong is (415) 833-2000.
- Does Stephen Ong accept Medicare?
- Stephen Ong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Ong's NPI active?
- Yes — Stephen Ong's NPI (1780750018) is active in the NPPES registry as of the last update on 2021-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.