Ruth Ann Kwong, M.D.
NPI 1932581873 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruth Ann Kwong, M.D. is a Internal Medicine Physician provider in San Francisco, CA (NPI 1932581873).
Provider details
- NPI number
- 1932581873
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A153334 (CA)
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
11 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
2,154 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 | 386 | $6 |
| Hemoglobin A1c Level83036 | 252 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 239 | $13 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 206 | $10 |
| Urine Microalbumin (protein) Level82043 | 170 | $6 |
| Creatinine Level to Test for Kidney Function Or Muscle Injury82570 | 170 | $5 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 71 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 831 | 229 |
| Losartan Potassium | 470 | 127 |
| Amlodipine Besylate | 412 | 109 |
| Alendronate Sodium | 221 | 70 |
| Metformin Hcl | 183 | 52 |
| Empagliflozinbrand: Jardiance | 154 | 49 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-06-28
- Last updated
- 2018-07-20
Frequently asked questions
- What is Ruth Ann Kwong's NPI number?
- Ruth Ann Kwong's National Provider Identifier (NPI) is 1932581873, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruth Ann Kwong's specialty?
- Ruth Ann Kwong is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ruth Ann Kwong located?
- Ruth Ann Kwong's practice location on file with NPPES is 1520 Stockton St, San Francisco, CA 94133-3354.
- What is Ruth Ann Kwong's phone number?
- The practice phone number listed in the NPPES registry for Ruth Ann Kwong is (415) 391-9686.
- Does Ruth Ann Kwong accept Medicare?
- Ruth Ann Kwong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruth Ann Kwong's NPI active?
- Yes — Ruth Ann Kwong's NPI (1932581873) is active in the NPPES registry as of the last update on 2018-07-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.