NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1346531175
Verify on CMS → Sarah Patterson
Rheumatology 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 6,200 in Rheumatology 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
125
Medicare Part D claims · 15 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
74.5/100
▼ 9 pts below national avg 83.1 · Mid-tier
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Sarah Patterson reported a CMS MIPS final score of 74.5/100 - below the 83.1 national average - and filed 125 Medicare Part D claims in 2023.
- 74.5/100
- MIPS score · -9 vs avg
- 125
- Part D claims, 2023
- 69%
- 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.
Sarah Patterson's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
75 12th percentile higher than 12% of 477,587 scored providers
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 Sarah Patterson sits
This provider among rheumatology physician peers
Across the 2,181 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Sarah Patterson writes more Part D claims than 3% of them and scores higher on MIPS quality than 13% - placing this provider in the lower-volume, lower-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
Each dot is one rheumatology physician peer from a representative sample of 60; the gold marker is Sarah Patterson. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Sarah Patterson 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 Sarah Patterson?
Below national averagePrimary specialty
Rheumatology Physician
Medicare Part D claims
125 94% vs specialty avg
MIPS final score
74.5/100 8.6 pts vs avg
Specialty distribution in California
How Rheumatology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Sarah Patterson's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 74.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Rheumatology Physician) - 74.5/100 vs national avg 83.1
How MIPS and board certification work
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).
Sarah Patterson appears in the CMS NPPES registry as a Rheumatology Physician provider at 505 PARNASSUS AVE, San Francisco, CA, 94143, with a listed phone of (415) 476-1528. NPI 1346531175 was issued on 04/27/2011.
Medicare Part D records for calendar year 2023 show 125 prescription claims written by this provider, covering 15 Medicare beneficiaries and totaling roughly $375K in drug spend, split 31% brand-name and 69% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 74.5/100 for the 2023 performance year, compared with the national average of 83.1.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,200 enrolled providers across 52 states and an average of 2,054 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
Provider Details
| NPI | 1346531175 |
|---|---|
| Specialty | Rheumatology Physician |
| Gender | Female |
| NPI Issued | 04/27/2011 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
74.4657
Final Score
Avg: 83.1
46.6814
Cost
76
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Sarah Patterson 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, Sarah Patterson 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 San Francisco
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).
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 Sarah Patterson. To verify Sarah Patterson'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
Sarah Patterson - brand share 31.0%
Rheumatology Physician average
31% brand-name claims vs 69% generic, on 125 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.
125
Total Claims
$375K
Total Drug Cost
15
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 175
- Total Day Supply
- 5,219
- Brand vs Generic
- 31% brand / 69% generic
- Brand Drug Cost
- $369K
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 57.6 years
- Avg HCC Risk Score
- 1.66
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sarah Patterson prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
29 claims
- Enbrel Sureclick
Enbrel Sureclick
14 claims
- Xeljanz
Xeljanz
13 claims
- Benlysta
Benlysta
12 claims
| Drug | Claims |
|---|---|
| Hydroxychloroquine Sulfate | 29 |
| Enbrel Sureclick Etanercept | 14 |
| Xeljanz Tofacitinib Citrate | 13 |
| Benlysta Belimumab | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Sarah Patterson fits within the Rheumatology Physician landscape nationally.
6,200
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Sarah Patterson's 125 claims are below the specialty average of 2,054.
Nearby Rheumatology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Patterson.
Dr. Thomas Abel
MD
Monte Sereno, CA
Dr. Thomas Adamson
M.D.
San Diego, CA
Dr. Sana Afroz
MD
Moreno Valley, CA
Dr. Atul Agrawal
MD
Antioch, CA
Dr. Bikramjit Ahluwalia
MD
Apple Valley, CA
Compare Rheumatology 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 Rheumatology 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.
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Frequently Asked Questions
What is Sarah Patterson's specialty? ▼
Sarah Patterson specializes in Rheumatology Physician and practices in San Francisco, California.
How much does Sarah Patterson prescribe under Medicare Part D? ▼
In 2023, Sarah Patterson wrote 125 Medicare Part D claims totaling $375K in drug costs for 15 beneficiaries.
What is Sarah Patterson's Medicare quality score? ▼
Sarah Patterson has a CMS MIPS Final Score of 74.5/100, Cost: 46.7. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Sarah Patterson located? ▼
Sarah Patterson is located at 505 PARNASSUS AVE, San Francisco, CA, 94143. Phone: (415) 476-1528.
What is Sarah Patterson's NPI number? ▼
Sarah Patterson's National Provider Identifier (NPI) is 1346531175, issued on 04/27/2011.
Does Sarah Patterson prescribe more brand-name or generic drugs? ▼
Sarah Patterson's prescribing is 31% brand-name and 69% generic drugs by claim count, with $369K in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,200 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Sarah Patterson prescribe most often? ▼
Based on 2023 Medicare Part D data, Sarah Patterson's most frequently prescribed drugs include Hydroxychloroquine Sulfate, Enbrel Sureclick, Xeljanz. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sarah Patterson accept Medicare? ▼
Sarah Patterson appears in CMS Medicare data with 125 Part D claims and 15 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sarah Patterson's credentials? ▼
Sarah Patterson's NPI is 1346531175. 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
View source datasets and methodology notes
- 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.