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2026 NPPES data Pulmonary Disease Physician NPI 1104169978 M.D.
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Paul Simpson, M.D.

Pulmonary Disease Physician in Fullerton, 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 9,647 in Pulmonary Disease 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
200
Medicare Part D claims · 37 beneficiaries · Pulmonary Disease Physician avg: 1K
Generic prescribing
0%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
6.6/100
▼ 77 pts below national avg 83.5 · Penalty band
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Paul Simpson, M.D. reported a CMS MIPS final score of 6.6/100 - below the 83.5 national average - and filed 200 Medicare Part D claims in 2024.

6.6/100
MIPS score · -77 vs avg
200
Part D claims, 2024
0%
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.

Federal trust snapshot

What official records show about Paul Simpson, 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 1104169978), first enumerated 03/31/2013.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 200 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 6.6/100 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 Paul Simpson, 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 1104169978 · Pulmonary Disease Physician

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

  • NPI-10 1104169978
  • ENUM-MID 2013
  • TAX-MID 10K Pulmonary Disease
  • MIPS-LOW 6.6/100
  • RX-LIGHT 200
  • BOOK-LIGHT 905 in California
  • PHOTO-FINISH Marshall Irby, M.D. · ±0.7

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

Paul Simpson, 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.

7 ≥ 2nd percentile 2% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). This entry sits in this band. 10–20: 3,008 measured providers (1%). Above this entry. 20–30: 3,069 measured providers (1%). Above this entry. 30–40: 2,746 measured providers (1%). Above this entry. 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 Paul Simpson, M.D. sits

This provider among pulmonary disease physician peers

Across the 2,467 pulmonary disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Paul Simpson, M.D. writes more Part D claims than 18% of them and scores higher on MIPS quality than 0% - 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: 58 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 85Paul Simpson, M.D., Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 0
Part D claim volume vs MIPS quality, by specialty percentile

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

✓
Board certification likely (heuristic, not verified)

Paul Simpson, 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 Paul Simpson, M.D.?

Below national average

NPI registry status

Active

Issued 03/31/2013

NPI 1104169978

Primary specialty

Pulmonary Disease Physician

Mid-sized

9,647 US NPIs in this specialty

Medicare Part D claims

200 87% vs specialty avg

2024 prescription claims

Specialty avg: 1,498

MIPS final score

6.6/100 76.9 pts vs avg

Penalty band band

vs 83.5 national avg

Specialty distribution in California

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

Medicare quality performance, MIPS

Paul Simpson, M.D.'s 2023 MIPS final score plotted against the Pulmonary Disease Physician national average

Below national average
MIPS Final Score
6.6/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%6.6%
MIPS final score (Pulmonary Disease Physician) - 6.6/100 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

2501 E CHAPMAN AVE STE 225
Fullerton, CA 92831
(714) 481-0172

Provider Details

NPI 1104169978
Specialty Pulmonary Disease Physician
Credentials M.D.
Gender Male
NPI Issued 03/31/2013

CMS Quality Score (MIPS)

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

6.5578
Final Score
Measured-score avg: 83.5
0
Quality
21.8593
Cost

Reporting: Individual

Hospital and facility affiliations

Facilities where Paul Simpson, 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.

Saadah Alrajab MD Mph Inc
La Mirada, 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 Paul Simpson, M.D.. To verify Paul Simpson, 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.

Brand vs generic prescribing mix · Brand-heavy

Paul Simpson, M.D. - brand share 53.0%
Pulmonary Disease Physician average

53% brand-name claims vs 0% generic, on 200 2024 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 2024.

200
Total Claims
$49K
Total Drug Cost
37
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
245.667
Total Day Supply
6,102
Brand vs Generic
53% brand / 0% generic
Brand Drug Cost
$45K

Patient Demographics

Average Patient Age
73.8 years
Avg HCC Risk Score
2.58
Gender Split
51% female / 49% male

Top Prescribed Drugs (Medicare Part D)

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

What Paul Simpson, 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
Trelegy Ellipta
Fluticasone/Umeclidin/Vilanter
38
Acetylcysteine
 19
Fluticasone Propionate
 19
Ventolin Hfa
Albuterol Sulfate
18
Albuterol Sulfate Hfa
Albuterol Sulfate
14
Montelukast Sodium
 12

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

More Pulmonary Disease Physician in CA → All providers in California → Compare specialties →

Pulmonary Disease Physician Overview

How Paul Simpson, M.D. fits within the Pulmonary Disease Physician landscape nationally.

9,647
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,498
Avg Claims per Provider

Paul Simpson, M.D.'s 200 claims are below the specialty average of 1,498.

Nationwide Pulmonary Disease Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (6.6 here).

Marshall Irby 5.9 LA Laurene Dipasquale 7.4 NJ Gregory Mauldin 5.5 GA Jonathan Evans 8.3 ME

Same NPPES enumeration year (2013)

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

Nimeh Najjar Hamilton, NJ Gustavo Fernandez Romero Philadelphia, PA Megan Conroy Westerville, OH Becky Lou Temple, TX

Nearby Pulmonary Disease Physician Providers in California

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

One of 905 Pulmonary Disease Physician providers enrolled in California, 5 are shown here.

Dr. Manoochehr Abadian Sharifabad
M.D.
Fountain Valley, CA
Dr. Mohamad Abdelfattah
MD
Fullerton, CA
Zainab Abdulsada
MBCHB
Sacramento, CA
Dr. Ayham Aboeed
M.D.
Bakersfield, CA
Dr. Babak Abrishami
D.O.
Los Angeles, CA

Compare Pulmonary Disease Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Paul Simpson, M.D.'s specialty? ▼
Paul Simpson, M.D. specializes in Pulmonary Disease Physician and practices in Fullerton, California. Credentials: M.D..
How much does Paul Simpson, M.D. prescribe under Medicare Part D? ▼
In 2024, Paul Simpson, M.D. wrote 200 Medicare Part D claims totaling $49K in drug costs for 37 beneficiaries.
What is Paul Simpson, M.D.'s Medicare quality score? ▼
Paul Simpson, M.D. has a CMS MIPS Final Score of 6.6/100 (Quality: 0, Cost: 21.9). 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 Paul Simpson, M.D. located? ▼
Paul Simpson, M.D. is located at 2501 E CHAPMAN AVE STE 225, Fullerton, CA, 92831. Phone: (714) 481-0172.
What is Paul Simpson, M.D.'s NPI number? ▼
Paul Simpson, M.D.'s National Provider Identifier (NPI) is 1104169978, issued on 03/31/2013.
Does Paul Simpson, M.D. prescribe more brand-name or generic drugs? ▼
Paul Simpson, M.D.'s prescribing is 53% brand-name and 0% generic drugs by claim count, with $45K in brand drug costs.
How many Pulmonary Disease Physician providers are there in the US? ▼
There are 9,647 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,498 Medicare Part D claims per year.
What drugs does Paul Simpson, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Paul Simpson, M.D.'s most frequently prescribed drugs include Trelegy Ellipta, Acetylcysteine, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Paul Simpson, M.D. accept Medicare? ▼
Paul Simpson, M.D. appears in CMS Medicare data with 200 Part D claims and 37 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Paul Simpson, M.D.'s credentials? ▼
Paul Simpson, M.D.'s NPI is 1104169978 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.