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2026 NPPES data Otolaryngology Physician NPI 1558576371 M.D.
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Thomas Stewart, M.D.

Otolaryngology Physician in Chico, 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 11,060 in Otolaryngology 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
940
Medicare Part D claims · 309 beneficiaries · Otolaryngology Physician avg: 536
MIPS score
76.7/100
▼ 7 pts below national avg 83.5 · Above neutral
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Thomas Stewart, M.D. reported a CMS MIPS final score of 76.7/100 - below the 83.5 national average - and filed 940 Medicare Part D claims in 2024.

76.7/100
MIPS score · -7 vs avg
940
Part D claims, 2024
Likely
board-certified (heuristic)
≥17th
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 Stewart, 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 1558576371), first enumerated 05/14/2007.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 940 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 76.7/100 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

  • Reported

    Hospital affiliations

    1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.

    Source: CMS Care Compare

  • State context

    State board disciplinary context

    California statewide board action statistics are published annually — these figures describe aggregate state activity, not Thomas Stewart, 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.

CMS NPPES provider registry desk

NPI 1558576371 · Otolaryngology Physician

NPI-10 · ENUM-MID · TAX-MID · MIPS-BELOW · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1558576371
  • ENUM-MID 2007
  • TAX-MID 11K Otolaryngology Physician
  • MIPS-BELOW 76.7/100
  • RX-LIGHT 940
  • BOOK-LIGHT 1,225 in California
  • PHOTO-FINISH Diane Davis, M.D. · ±0.0

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 Stewart, 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.

77 ≥ 17th percentile 17% 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%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). This entry sits in this band. 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 Stewart, M.D. sits

This provider among otolaryngology physician peers

Across the 3,290 otolaryngology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Thomas Stewart, M.D. writes more Part D claims than 81% of them and scores higher on MIPS quality than 25% - placing this provider in the high-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: 87 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 60Thomas Stewart, M.D., Part D claim volume, percentile in specialty: 81 · MIPS quality, percentile: 25
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one otolaryngology physician peer from a representative sample of 60; the gold marker is Thomas Stewart, 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 Stewart, 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).

What does the federal data show about Thomas Stewart, M.D.?

Below national average

NPI registry status

Active

Issued 05/14/2007

NPI 1558576371

Primary specialty

Otolaryngology Physician

Mid-sized

11,060 US NPIs in this specialty

Medicare Part D claims

940 75% vs specialty avg

2024 prescription claims

Specialty avg: 536

MIPS final score

76.7/100 6.8 pts vs avg

Above neutral band

vs 83.5 national avg

Specialty distribution in California

How Otolaryngology 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%Otolaryngology Physician0.1%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Thomas Stewart, M.D.'s 2023 MIPS final score plotted against the Otolaryngology Physician national average

Below national average
MIPS Final Score
76.7/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%76.7%
MIPS final score (Otolaryngology Physician) - 76.7/100 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

135 MISSION RANCH BLVD
Chico, CA 95926
(530) 342-2411

Provider Details

NPI 1558576371
Specialty Otolaryngology Physician
Credentials M.D.
Gender Male
NPI Issued 05/14/2007

CMS Quality Score (MIPS)

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

76.6692
Final Score
Measured-score avg: 83.5
58.2167
Quality
56.9092
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Thomas Stewart, 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.

Enloe Medical Center
Chico, 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 Thomas Stewart, M.D.. To verify Thomas Stewart, 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.

940
Total Claims
$32K
Total Drug Cost
309
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,826.767
Total Day Supply
49,687
Generic Drug Cost
$30K
Opioid Claims
42 (4.5% rate)
Antibiotic Claims
40

Patient Demographics

Average Patient Age
73.4 years
Avg HCC Risk Score
1.26
Gender Split
62% female / 38% male
Age Distribution
<65: 32, 65-74: 141, 75-84: 103, 85+: 33

Top Prescribed Drugs (Medicare Part D)

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

What Thomas Stewart, 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
Ipratropium Bromide
 193
Montelukast Sodium
 172
Fluticasone Propionate
 155
Azelastine Hcl
 131
Ofloxacin
 38
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
30
Ciprofloxacin-Dexamethasone
Ciprofloxacin Hcl/Dexameth
26
Levothyroxine Sodium
 25
Amoxicillin
 15
Mupirocin
 15

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

More Otolaryngology Physician in CA → All providers in California → Compare specialties →

Otolaryngology Physician Overview

How Thomas Stewart, M.D. fits within the Otolaryngology Physician landscape nationally.

11,060
Otolaryngology Physician Providers in US
54
States with Otolaryngology Physician
536
Avg Claims per Provider

Thomas Stewart, M.D.'s 940 claims are above the specialty average of 536.

Nationwide Otolaryngology Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (76.7 here).

Ricky Jensen 76.7 SD Sean Johnson 76.7 SD Patrick Munson 76.7 SD Diane Davis 76.7 GA

Same NPPES enumeration year (2007)

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

Sung-Won Kim Olympia, WA Ashli O'Rourke Charleston, SC Christopher Hetrick Mount Vernon, OH Bradley Byrne Texarkana, TX

Nearby Otolaryngology Physician Providers in California

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

One of 1,225 Otolaryngology Physician providers enrolled in California, 5 are shown here.

Dr. Arman Abdalkhani
MD
Palo Alto, CA
Ahmed Abdelmeguid
Palo Alto, CA
Dr. Rami Abdou
M.D.
Santa Rosa, CA
Eric Abello
Orange, CA
Dr. Mohamed Aboueisha
MD
Los Angeles, CA

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

Frequently Asked Questions

What is Thomas Stewart, M.D.'s specialty? ▼
Thomas Stewart, M.D. specializes in Otolaryngology Physician and practices in Chico, California. Credentials: M.D..
How much does Thomas Stewart, M.D. prescribe under Medicare Part D? ▼
In 2024, Thomas Stewart, M.D. wrote 940 Medicare Part D claims totaling $32K in drug costs for 309 beneficiaries.
What is Thomas Stewart, M.D.'s Medicare quality score? ▼
Thomas Stewart, M.D. has a CMS MIPS Final Score of 76.7/100 (Quality: 58.2, Cost: 56.9). 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 Stewart, M.D. located? ▼
Thomas Stewart, M.D. is located at 135 MISSION RANCH BLVD, Chico, CA, 95926. Phone: (530) 342-2411.
What is Thomas Stewart, M.D.'s NPI number? ▼
Thomas Stewart, M.D.'s National Provider Identifier (NPI) is 1558576371, issued on 05/14/2007.
Does Thomas Stewart, M.D. prescribe opioids? ▼
Yes, Thomas Stewart, M.D. had 42 opioid claims in 2024 with an opioid prescribing rate of 4.5%.
How many Otolaryngology Physician providers are there in the US? ▼
There are 11,060 Otolaryngology Physician providers across 54 states in the US. The average Otolaryngology Physician provider writes 536 Medicare Part D claims per year.
What drugs does Thomas Stewart, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Thomas Stewart, M.D.'s most frequently prescribed drugs include Ipratropium Bromide, Montelukast Sodium, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Stewart, M.D. accept Medicare? ▼
Thomas Stewart, M.D. appears in CMS Medicare data with 940 Part D claims and 309 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Stewart, M.D.'s credentials? ▼
Thomas Stewart, M.D.'s NPI is 1558576371 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.