2026 NPPES data Surgery of the Hand (Plastic Surgery) Physician NPI 1891992103 M.D.
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THOMAS YEN, M.D.

Surgery of the Hand (Plastic Surgery) Physician in SANTA CRUZ, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
95
Medicare Part D claims · 40 beneficiaries · Surgery of the Hand (Plastic Surgery) Physician avg: 106
MIPS score
96.5085/100
▲ 13 pts above national avg 83.1 · [object Object]
Industry payments
$230.09
11 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: THOMAS YEN, M.D. is a Surgery of the Hand (Plastic Surgery) Physician ([object Object]) practicing in SANTA CRUZ, California with a Medicare Part D prescribing footprint of 95 claims across 40 beneficiaries . Their CMS MIPS Final Score of 96.5085/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $230.09 across 11 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: THOMAS YEN, M.D. reported a CMS MIPS final score of 96.5085 out of 100, above the 83.1 national average, and filed 95 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

THOMAS YEN, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

THOMAS YEN, M.D. at a glance

High performer (top quartile)

NPI registry status

Active

Issued 06/29/2007

NPI 1891992103

Primary specialty

Surgery of the Hand (Plastic Surgery) Physician

Rare

370 US NPIs in this specialty

Medicare Part D claims

95 10% vs specialty avg

2023 prescription claims

Specialty avg: 106

MIPS final score

96.5085/100 13.408500000000004% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in California

How Surgery of the Hand (Plastic Surgery) Physician compares to other specialties among California providers

California providers

Surgery of the Hand (Plastic Surgery) Physician share within California

1. Surgery of the Hand (Plastic Surgery) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Surgery of the Hand (Plastic Surgery) Physician share within California

Medicare quality performance — MIPS

THOMAS YEN, M.D.'s 2023 MIPS final score plotted against the Surgery of the Hand (Plastic Surgery) Physician national average

High performer (top quartile)
MIPS Final Score
96.5085/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Surgery of the Hand (Plastic Surgery) Physician) — 96.5085/100 vs national avg 83.1

0%100%National avg83%96.5%
MIPS final score (Surgery of the Hand (Plastic Surgery) Physician) — 96.5085/100 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).

THOMAS YEN, M.D. is a Surgery of the Hand (Plastic Surgery) Physician provider practicing in SANTA CRUZ, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1891992103. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

THOMAS YEN, M.D. appears in the CMS NPPES registry as a Surgery of the Hand (Plastic Surgery) Physician provider holding M.D. credentials at 1595 SOQUEL DR, SANTA CRUZ, CA, 95065, with a listed phone of (831) 464-8880. NPI 1891992103 was issued on 06/29/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what YEN 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 95 prescription claims written by this provider, covering 40 Medicare beneficiaries and totaling roughly $21K in drug spend, with an opioid prescribing rate of 27.4%. 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 96.5085/100 for the 2023 performance year (Quality 80.342), compared with the national average of 83.1.

Surgery of the Hand (Plastic Surgery) Physician is a narrow specialty nationwide, with 370 enrolled providers across 43 states and an average of 106 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

1595 SOQUEL DR
SANTA CRUZ, CA 95065

Provider Details

NPI 1891992103
Specialty Surgery of the Hand (Plastic Surgery) Physician
Credentials M.D.
Gender Male
NPI Issued 06/29/2007

CMS Quality Score (MIPS)

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

96.5085
Final Score
Avg: 83.1
80.342
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where THOMAS YEN, M.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.

DIGNITY HEALTH MEDICAL FOUNDATION
SANTA CRUZ, 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 THOMAS YEN, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$230

Largest payer

Endo USA, 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 THOMAS YEN, M.D.. To verify THOMAS YEN, M.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.

Medicare Part D Prescribing Data

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

95
Total Claims
$21K
Total Drug Cost
40
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
99
Total Day Supply
986
Generic Drug Cost
$1K
Opioid Claims
26 (27.4% rate)
Antibiotic Claims
50

Patient Demographics

Average Patient Age
71.3 years
Avg HCC Risk Score
1.48
Gender Split
65% female / 35% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Cephalexin
29
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
22

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

Surgery of the Hand (Plastic Surgery) Physician Overview

How THOMAS YEN, M.D. fits within the Surgery of the Hand (Plastic Surgery) Physician landscape nationally.

370
Surgery of the Hand (Plastic Surgery) Physician Providers in US
43
States with Surgery of the Hand (Plastic Surgery) Physician
106
Avg Claims per Provider

THOMAS YEN, M.D.'s 95 claims are below the specialty average of 106.

Nearby Surgery of the Hand (Plastic Surgery) Physician Providers in California

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

Compare Surgery of the Hand (Plastic Surgery) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS YEN, M.D.'s specialty?
THOMAS YEN, M.D. specializes in Surgery of the Hand (Plastic Surgery) Physician and practices in SANTA CRUZ, California. Credentials: M.D..
How much does THOMAS YEN, M.D. prescribe under Medicare Part D?
In 2023, THOMAS YEN, M.D. wrote 95 Medicare Part D claims totaling $21K in drug costs for 40 beneficiaries.
What is THOMAS YEN, M.D.'s Medicare quality score?
THOMAS YEN, M.D. has a CMS MIPS Final Score of 96.5085/100 (Quality: 80.342). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is THOMAS YEN, M.D. located?
THOMAS YEN, M.D. is located at 1595 SOQUEL DR, SANTA CRUZ, CA, 95065. Phone: (831) 464-8880.
What is THOMAS YEN, M.D.'s NPI number?
THOMAS YEN, M.D.'s National Provider Identifier (NPI) is 1891992103, issued on 06/29/2007.
Does THOMAS YEN, M.D. prescribe opioids?
Yes, THOMAS YEN, M.D. had 26 opioid claims in 2023 with an opioid prescribing rate of 27.4%.
How many Surgery of the Hand (Plastic Surgery) Physician providers are there in the US?
There are 370 Surgery of the Hand (Plastic Surgery) Physician providers across 43 states in the US. The average Surgery of the Hand (Plastic Surgery) Physician provider writes 106 Medicare Part D claims per year.
What drugs does THOMAS YEN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS YEN, M.D.'s most frequently prescribed drugs include Cephalexin, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS YEN, M.D. accept Medicare?
THOMAS YEN, M.D. appears in CMS Medicare data with 95 Part D claims and 40 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS YEN, M.D.'s credentials?
THOMAS YEN, M.D.'s NPI is 1891992103 with credentials M.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