2026 NPPES data Ophthalmology Physician NPI 1245334606 M.D., PH.D.
Verify on CMS →

Matilda Chan, M.D., PH.D.

Ophthalmology Physician in San Francisco, California. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 22,090 in Ophthalmology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
1K
Medicare Part D claims · 279 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
58%
generic claims · 42% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.9/100
▲ 9 pts above national avg 83.1 · Exceptional
Industry payments
$217.45
2 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Matilda Chan, M.D., PH.D. reported a CMS MIPS final score of 91.9/100 - above the 83.1 national average - and filed 1,240 Medicare Part D claims in 2023.

91.9/100
MIPS score · +9 vs avg
1K
Part D claims, 2023
58%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

Matilda Chan, M.D., PH.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

92 Top 37% higher than 63% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90+: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Matilda Chan, M.D., PH.D. sits

This provider among ophthalmology physician peers

Across the 9,866 ophthalmology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Matilda Chan, M.D., PH.D. writes more Part D claims than 53% of them and scores higher on MIPS quality than 62% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.448.873.297.7Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 32Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 33Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 82Matilda Chan, M.D., PH.D.-Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 62
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one ophthalmology physician peer from a representative sample of 60; the gold marker is Matilda Chan, M.D., PH.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Matilda Chan, M.D., PH.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Matilda Chan, M.D., PH.D.?

High performer (top quartile)

NPI registry status

Active

Issued 09/07/2006

NPI 1245334606

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

1,240 13% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

MIPS final score

91.9/100 8.8 pts vs avg

Exceptional band

vs 83.1 national avg

Specialty distribution in California

How Ophthalmology Physician compares to other specialties among California providers

California providers

Largest specialties in California (% of in-state providers)

Behavior Technician - 17.3%Behavior Technician17.3%Marriage & Family Therapist - 5.5%Marriage & Family Therapist5.5%Student in an Organized Health Care Education/Training Program - 5%Student in an Organized Health Care Education/Training Program5%Mental Health Counselor - 3.9%Mental Health Counselor3.9%Pharmacist - 3.5%Pharmacist3.5%Clinical Social Worker - 3.1%Clinical Social Worker3.1%Ophthalmology Physician - 0.3%Ophthalmology Physician0.3%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Matilda Chan, M.D., PH.D.'s 2023 MIPS final score plotted against the Ophthalmology Physician national average

High performer (top quartile)
MIPS Final Score
91.9/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Ophthalmology Physician) - 91.9/100 vs national avg 83.1

0%100%National avg83%91.9%
MIPS final score (Ophthalmology Physician) - 91.9/100 vs national avg 83.1

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Matilda Chan, M.D., PH.D. appears in the CMS NPPES registry as a Ophthalmology Physician provider holding M.D., PH.D. credentials at 95 KIRKHAM ST, San Francisco, CA, 94143, with a listed phone of (415) 476-1442. NPI 1245334606 was issued on 09/07/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Chan most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 1,240 prescription claims written by this provider, covering 279 Medicare beneficiaries and totaling roughly $133K in drug spend, split 42% brand-name and 58% generic by claim count. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.9/100 for the 2023 performance year (Quality 83.5, Cost 68), compared with the national average of 83.1.

Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

95 KIRKHAM ST
San Francisco, CA 94143

Provider Details

NPI 1245334606
Specialty Ophthalmology Physician
Credentials M.D., PH.D.
Gender Female
NPI Issued 09/07/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.8508
Final Score
Avg: 83.1
83.5371
Quality
68.0152
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Matilda Chan, M.D., PH.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

According to CMS billing records, Matilda Chan, M.D., PH.D. is affiliated with 3 Medicare-billing facilities.

Regents OF The University OF California
San Francisco, CA
Ucsf Medical Group Business Services
San Francisco, CA
University OF California Sfgh Medical Group
San Francisco, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) - CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Matilda Chan, M.D., PH.D.. Source: openpaymentsdata.cms.gov.

Total received

$217

Largest payer

Amgen Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context - California MBC 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Matilda Chan, M.D., PH.D.. To verify Matilda Chan, M.D., PH.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Above average

Matilda Chan, M.D., PH.D. - brand share 42.0%
Ophthalmology Physician average

42% brand-name claims vs 58% generic, on 1,240 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

1,240
Total Claims
$133K
Total Drug Cost
279
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,269
Total Day Supply
65,991
Brand vs Generic
42% brand / 58% generic
Brand Drug Cost
$106K
Generic Drug Cost
$26K
Antibiotic Claims
30

Patient Demographics

Average Patient Age
74.2 years
Avg HCC Risk Score
1.36
Gender Split
57% female / 43% male
Age Distribution
<65: 17, 65-74: 135, 75-84: 96, 85+: 31

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Matilda Chan, M.D., PH.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Latanoprost
354
Brimonidine Tartrate
173
Timolol Maleate
162
Dorzolamide Hcl
91
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
68
Prednisolone Acetate
63
Xiidra
Lifitegrast
37
Polymyxin B Sul-Trimethoprim
Polymyxin B Sulf/Trimethoprim
32
Restasis
Cyclosporine
27
Cyclosporine
19

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Ophthalmology Physician Overview

How Matilda Chan, M.D., PH.D. fits within the Ophthalmology Physician landscape nationally.

22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider

Matilda Chan, M.D., PH.D.'s 1,240 claims are below the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chan.

Compare Ophthalmology Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Ophthalmology Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Matilda Chan, M.D., PH.D.'s specialty?
Matilda Chan, M.D., PH.D. specializes in Ophthalmology Physician and practices in San Francisco, California. Credentials: M.D., PH.D..
How much does Matilda Chan, M.D., PH.D. prescribe under Medicare Part D?
In 2023, Matilda Chan, M.D., PH.D. wrote 1,240 Medicare Part D claims totaling $133K in drug costs for 279 beneficiaries.
What is Matilda Chan, M.D., PH.D.'s Medicare quality score?
Matilda Chan, M.D., PH.D. has a CMS MIPS Final Score of 91.9/100 (Quality: 83.5, Cost: 68). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Matilda Chan, M.D., PH.D. located?
Matilda Chan, M.D., PH.D. is located at 95 KIRKHAM ST, San Francisco, CA, 94143. Phone: (415) 476-1442.
What is Matilda Chan, M.D., PH.D.'s NPI number?
Matilda Chan, M.D., PH.D.'s National Provider Identifier (NPI) is 1245334606, issued on 09/07/2006.
Does Matilda Chan, M.D., PH.D. prescribe more brand-name or generic drugs?
Matilda Chan, M.D., PH.D.'s prescribing is 42% brand-name and 58% generic drugs by claim count, with $106K in brand drug costs.
How many Ophthalmology Physician providers are there in the US?
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does Matilda Chan, M.D., PH.D. prescribe most often?
Based on 2023 Medicare Part D data, Matilda Chan, M.D., PH.D.'s most frequently prescribed drugs include Latanoprost, Brimonidine Tartrate, Timolol Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Matilda Chan, M.D., PH.D. accept Medicare?
Matilda Chan, M.D., PH.D. appears in CMS Medicare data with 1,240 Part D claims and 279 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Matilda Chan, M.D., PH.D.'s credentials?
Matilda Chan, M.D., PH.D.'s NPI is 1245334606 with credentials M.D., PH.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the PlainDoctor editorial team.