Quick answers
- Does Ruth Ann C. Kwong accept Medicare assignment?
- Yes. Medicare's clinician data says Ruth Ann C. Kwong accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Ruth Ann C. Kwong see?
- In 2024, CMS data shows 256 Original Medicare patients and 2,219 services for Ruth Ann C. Kwong. This counts Original Medicare only and measures volume, not quality.
- What is Ruth Ann C. Kwong's NPI number?
- 1932581873. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ruth Ann C. Kwong, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 256 |
|---|---|
| Services billed to Medicare | 2,219 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Insertion of needle into vein for collection of blood sample (36415)386 services
- Hemoglobin a1c level (83036)252 services
- Blood test, lipids (cholesterol and triglycerides) (80061)239 services
- Blood test, comprehensive group of blood chemicals (80053)206 services
- Urine microalbumin (protein) level (82043)170 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure70%
- Diabetes36%
- Arthritis29%
- Chronic kidney disease23%
- Osteoporosis22%
Hospitals where Ruth Ann C. Kwong works
Medicare's Facility Affiliation Data lists Ruth Ann C. Kwong at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050047
- California Pacific Medical Center-Davies Campus HospitalSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050008
- Chinese HospitalSan Francisco, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050407
- Zuckerberg San Francisco General Hospital & Trauma CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050228
Practice locations
Addresses where Ruth Ann C. Kwong is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1033 Clement StSan Francisco, CA 94118 (415) 391‑9686
- 1400 Noriega StSan Francisco, CA 94122 (415) 391‑9686
- 1422 Noriega StSan Francisco, CA 94122 (415) 391‑9686
- 1450 Noriega StSan Francisco, CA 94122 (415) 391‑9686
- 1520 Stockton StSan Francisco, CA 94133 (415) 391‑9686
Group practices
Medicare enrollment lists Ruth Ann C. Kwong as a member of this group (CMS data updated October 2, 2026).
- North East Medical Services143 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Other clinicians in North East Medical Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932581873 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians