Quick answers
- Does Matilda F. Chan accept Medicare assignment?
- Yes. Medicare's clinician data says Matilda F. Chan 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 Matilda F. Chan see?
- In 2024, CMS data shows 206 Original Medicare patients and 397 services for Matilda F. Chan. This counts Original Medicare only and measures volume, not quality.
- What is Matilda F. Chan's NPI number?
- 1245334606. 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 Matilda F. Chan, 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 | 206 |
|---|---|
| Services billed to Medicare | 397 |
| Different services or procedures | 32 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)134 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)33 services
- Imaging of retina (92134)28 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)21 services
- Injection of drug into eye (67028)18 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 cholesterol67%
- High blood pressure57%
- Arthritis43%
- Diabetes31%
- Chronic kidney disease23%
- Osteoporosis23%
Hospitals where Matilda F. Chan works
Medicare's Facility Affiliation Data lists Matilda F. Chan 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.
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454
- 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 Matilda F. Chan is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1001 Potrero AveSan Francisco, CA 94110
- 1001 Potrero Ave Bldg 80 Ward 83, Suite 32San Francisco, CA 94110 (628) 206‑8610
- 400 Parnassus AveSan Francisco, CA 94143
- 505 Parnassus AveSan Francisco, CA 94143 (415) 476‑1000
- 505 Parnassus Ave, M1490San Francisco, CA 94143 (415) 472‑1000
Group practices
Medicare enrollment lists Matilda F. Chan as a member of these groups (CMS data updated October 2, 2026).
- UCSF Medical Group Business Services1,598 clinicians in the group
- Regents of the University of California732 clinicians in the group
- University of California SFGH Medical Group587 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Other clinicians in UCSF Medical Group Business Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245334606 |
| 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