NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1841326386 MD
Verify on CMS → Jan Lin, MD
Rheumatology Physician in San Jose, 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 6,181 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
2K
Medicare Part D claims · 397 beneficiaries · Rheumatology Physician avg: 2K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Jan Lin, MD filed 2,031 Medicare Part D claims in 2023 as a Rheumatology Physician in San Jose, California.
- 2K
- Part D claims, 2023
- 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.
Jan Lin, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,031 Top 16% higher than 84% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Jan Lin, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Jan Lin, MD?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
2,031 1% vs specialty avg
Specialty distribution in California
How Rheumatology Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Rheumatology Physician. Verify directly:
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).
Jan Lin, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 260 INTERNATIONAL CIR, San Jose, CA, 95119, with a listed phone of (408) 851-1000. NPI 1841326386 was issued on 02/27/2007.
Medicare Part D records for calendar year 2023 show 2,031 prescription claims written by this provider, covering 397 Medicare beneficiaries and totaling roughly $1.5 million in drug spend.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 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 | 1841326386 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 02/27/2007 |
Hospital and facility affiliations
Facilities where Jan Lin, MD 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.
Permanente Medical Group Inc
Santa Clara, 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 Jan Lin, MD. To verify Jan Lin, MD'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
2,031
Total Claims
$1.5M
Total Drug Cost
397
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,872
- Total Day Supply
- 143,339
- Generic Drug Cost
- $54K
Patient Demographics
- Average Patient Age
- 74.5 years
- Avg HCC Risk Score
- 1.79
- Gender Split
- 75% female / 25% male
- Age Distribution
- <65: 26, 65-74: 169, 75-84: 153, 85+: 49
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jan Lin, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
335 claims
- Methotrexate
Methotrexate
285 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
272 claims
- Leflunomide
Leflunomide
156 claims
- Diclofenac Sodium 101
Diclofenac Sodium
101 claims
- Colchicine 76
Colchicine
76 claims
- Sulfasalazine 74
Sulfasalazine
74 claims
- Leucovorin Calcium 66
Leucovorin Calcium
66 claims
| Drug | Claims |
|---|---|
| Prednisone | 335 |
| Methotrexate Methotrexate Sodium | 285 |
| Hydroxychloroquine Sulfate | 272 |
| Leflunomide | 156 |
| Diclofenac Sodium | 101 |
| Colchicine | 76 |
| Sulfasalazine | 74 |
| Leucovorin Calcium | 66 |
| Enbrel Etanercept | 62 |
| Amjevita(Cf) Autoinjector Adalimumab-Atto | 46 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Jan Lin, MD fits within the Rheumatology Physician landscape nationally.
6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Jan Lin, MD's 2,031 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 Lin.
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 Jan Lin, MD's specialty? ▼
Jan Lin, MD specializes in Rheumatology Physician and practices in San Jose, California. Credentials: MD.
How much does Jan Lin, MD prescribe under Medicare Part D? ▼
In 2023, Jan Lin, MD wrote 2,031 Medicare Part D claims totaling $1.5M in drug costs for 397 beneficiaries.
Where is Jan Lin, MD located? ▼
Jan Lin, MD is located at 260 INTERNATIONAL CIR, San Jose, CA, 95119. Phone: (408) 851-1000.
What is Jan Lin, MD's NPI number? ▼
Jan Lin, MD's National Provider Identifier (NPI) is 1841326386, issued on 02/27/2007.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,181 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 Jan Lin, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Jan Lin, MD's most frequently prescribed drugs include Prednisone, Methotrexate, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jan Lin, MD accept Medicare? ▼
Jan Lin, MD appears in CMS Medicare data with 2,031 Part D claims and 397 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jan Lin, MD's credentials? ▼
Jan Lin, MD's NPI is 1841326386 with credentials MD. 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.
- 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.