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2026 NPPES data Nuclear Cardiology Physician NPI 1508816596 M.D.
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Thomas Watters, M.D.

Nuclear Cardiology Physician in San Mateo, 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 391 in Nuclear Cardiology 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
252
Medicare Part D claims · 123 beneficiaries · Nuclear Cardiology Physician avg: 4K
MIPS score
30/100
▼ 54 pts below national avg 83.5 · Below average
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Thomas Watters, M.D. reported a CMS MIPS final score of 30/100 - below the 83.5 national average - and filed 252 Medicare Part D claims in 2024.

30/100
MIPS score · -53 vs avg
252
Part D claims, 2024
Likely
board-certified (heuristic)
≥3rd
pct among measured MIPS (lower-bound band)

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.

Federal trust snapshot

What official records show about Thomas Watters, M.D.

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1508816596), first enumerated 05/11/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 252 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 30/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • State context

    State board disciplinary context

    California statewide board action statistics are published annually — these figures describe aggregate state activity, not Thomas Watters, M.D.'s individual license status. Verify directly with the state medical board.

    Source: MBC annual report 2023

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

Compare Watters with other Nuclear Cardiology Physician providers

Same primary specialty, same federal CMS NPPES roster.

Also enrolled in California

Other specialties in San Mateo: Behavior Technician (845) · Marriage & Family Therapist (307) · Mental Health Counselor (227) · Behavior Analyst (197)

CMS NPPES provider registry desk

NPI 1508816596 · Nuclear Cardiology Physician

NPI-10 · ENUM-LEGACY · TAX-TRACE · MIPS-LOW · RX-LIGHT · BOOK-THIN · NEAR-MIPS

  • NPI-10 1508816596
  • ENUM-LEGACY 2006
  • TAX-TRACE 391
  • MIPS-LOW 30/100
  • RX-LIGHT 252
  • BOOK-THIN 47 in California
  • NEAR-MIPS Ijaz Ahmad, M.D · 7.3

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Thomas Watters, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

30 ≥ 3rd percentile 3% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). This entry sits in this band. 40–50: 2,928 measured providers (1%). Above this entry. 50–60: 5,882 measured providers (1%). Above this entry. 60–70: 13,906 measured providers (3%). Above this entry. 70–80: 94,570 measured providers (21%). Above this entry. 80–90: 129,887 measured providers (29%). Above this entry. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

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

Where Thomas Watters, M.D. sits

This provider among nuclear cardiology physician peers

Across the 147 nuclear cardiology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Thomas Watters, M.D. writes more Part D claims than 4% of them and scores higher on MIPS quality than 4% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.448.873.297.7Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 73Thomas Watters, M.D., Part D claim volume, percentile in specialty: 4 · MIPS quality, percentile: 4
Part D claim volume vs MIPS quality, by specialty percentile

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

✓
Board certification likely (heuristic, not verified)

Thomas Watters, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Thomas Watters, M.D.?

Below national average

NPI registry status

Active

Issued 05/11/2006

NPI 1508816596

Primary specialty

Nuclear Cardiology Physician

Rare

391 US NPIs in this specialty

Medicare Part D claims

252 94% vs specialty avg

2024 prescription claims

Specialty avg: 4,174

MIPS final score

30/100 53.5 pts vs avg

Below average band

vs 83.5 national avg

Specialty distribution in California

How Nuclear Cardiology Physician compares to other specialties among California providers

California providers
Behavior Technician17.9%Marriage & Family Therapist5.4%Student in an Organized Heal…5.1%Mental Health Counselor3.7%Pharmacist3.4%Clinical Social Worker3.1%Nuclear Cardiology Physician0%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Thomas Watters, M.D.'s 2023 MIPS final score plotted against the Nuclear Cardiology Physician national average

Below national average
MIPS Final Score
30/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%30%
MIPS final score (Nuclear Cardiology Physician) - 30/100 vs national avg 83.5
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).

Practice Address

101 S SAN MATEO DR
San Mateo, CA 94401
(650) 218-5758

Provider Details

NPI 1508816596
Specialty Nuclear Cardiology Physician
Credentials M.D.
Gender Male
NPI Issued 05/11/2006

CMS Quality Score (MIPS)

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

30
Final Score
Measured-score avg: 83.5
0
Quality
100
Cost

Reporting: Individual

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 Watters, M.D.. To verify Thomas Watters, 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 2024.

252
Total Claims
$37K
Total Drug Cost
123
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
693.4
Total Day Supply
20,686
Generic Drug Cost
$5K

Patient Demographics

Average Patient Age
80.1 years
Avg HCC Risk Score
1.20
Gender Split
52% female / 48% male
Age Distribution
<65: 0, 65-74: 36, 75-84: 50, 85+: 37

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What Thomas Watters, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Atorvastatin Calcium
 31
Amlodipine Besylate
 17
Repatha Sureclick
Evolocumab
15
Metformin Hcl
 13
Metoprolol Succinate
 11

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

More Nuclear Cardiology Physician in CA → All providers in California → Compare specialties →

Nuclear Cardiology Physician Overview

How Thomas Watters, M.D. fits within the Nuclear Cardiology Physician landscape nationally.

391
Nuclear Cardiology Physician Providers in US
37
States with Nuclear Cardiology Physician
4,174
Avg Claims per Provider

Thomas Watters, M.D.'s 252 claims are below the specialty average of 4,174.

Nationwide Nuclear Cardiology Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Watters, both outside California so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (30 here).

Ijaz Ahmad 22.7 NY Chandra Polam 41 PA Marc Nolan 16.3 NY Klaus Rentrop 12 NY

Same NPPES enumeration year (2006)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Kevin Bybee Kansas City, MO Ashok Kondur Taylor, MI Virendra Patel Brick, NJ Norrapol Wattanasuwan Laurel, MS

Nearby Nuclear Cardiology Physician Providers in California

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

One of 47 Nuclear Cardiology Physician providers enrolled in California, 11 are shown on this page.

Dr. Chiayu Chen
MD
Riverside, CA
Anuradha Chirala
MBBS
Morgan Hill, CA
Dr. Howard Dinh
M.D.
Sacramento, CA
Dr. Mark Eaton
MD
Sacramento, CA
Dr. Georg Emlein
M.D
Sacramento, CA

Compare Nuclear Cardiology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Thomas Watters, M.D.'s specialty? ▼
Thomas Watters, M.D. specializes in Nuclear Cardiology Physician and practices in San Mateo, California. Credentials: M.D..
How much does Thomas Watters, M.D. prescribe under Medicare Part D? ▼
In 2024, Thomas Watters, M.D. wrote 252 Medicare Part D claims totaling $37K in drug costs for 123 beneficiaries.
What is Thomas Watters, M.D.'s Medicare quality score? ▼
Thomas Watters, M.D. has a CMS MIPS Final Score of 30/100 (Quality: 0, Cost: 100). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Thomas Watters, M.D. located? ▼
Thomas Watters, M.D. is located at 101 S SAN MATEO DR, San Mateo, CA, 94401. Phone: (650) 218-5758.
What is Thomas Watters, M.D.'s NPI number? ▼
Thomas Watters, M.D.'s National Provider Identifier (NPI) is 1508816596, issued on 05/11/2006.
How many Nuclear Cardiology Physician providers are there in the US? ▼
There are 391 Nuclear Cardiology Physician providers across 37 states in the US. The average Nuclear Cardiology Physician provider writes 4,174 Medicare Part D claims per year.
What drugs does Thomas Watters, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Thomas Watters, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Repatha Sureclick. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Watters, M.D. accept Medicare? ▼
Thomas Watters, M.D. appears in CMS Medicare data with 252 Part D claims and 123 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Watters, M.D.'s credentials? ▼
Thomas Watters, M.D.'s NPI is 1508816596 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

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 (2024). 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 August 2026 (NPPES) / 2024 (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 editorial process.

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 August 2026.