2026 NPPES data Physician Assistant NPI 1205978632 P.A.-C, MMS
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LEIGH DUNN, P.A.-C, MMS

Physician Assistant in SAINT LOUIS, Missouri. 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
699
Medicare Part D claims · 244 beneficiaries · Physician Assistant avg: 790

What the federal data shows

LEIGH DUNN, P.A.-C, MMS filed 699 Medicare Part D claims in 2023 as a Physician Assistant in SAINT LOUIS, Missouri.

699
Part D claims, 2023

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.

LEIGH DUNN, P.A.-C, MMS's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

699 Top 31% higher than 69% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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

What does the federal data show about LEIGH DUNN, P.A.-C, MMS?

Quality data not reported

NPI registry status

Active

Issued 02/13/2007

NPI 1205978632

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

699 12% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Missouri

How Physician Assistant compares to other specialties among Missouri providers

Missouri providers

Physician Assistant share within Missouri

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within Missouri

Specialty board-certification context

Estimated specialty board-certified rate — Physician Assistant (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Physician Assistant ABMS/AOA estimate

Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

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).

LEIGH DUNN, P.A.-C, MMS is a Physician Assistant provider practicing in SAINT LOUIS, Missouri, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: P.A.-C, MMS. NPI: 1205978632. 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.

LEIGH DUNN, P.A.-C, MMS appears in the CMS NPPES registry as a Physician Assistant provider holding P.A.-C, MMS credentials at 3009 N BALLAS RD, SAINT LOUIS, MO, 63131, with a listed phone of (314) 996-5900. NPI 1205978632 was issued on 02/13/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DUNN 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 699 prescription claims written by this provider, covering 244 Medicare beneficiaries and totaling roughly $65K in drug spend. 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.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 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

3009 N BALLAS RD
SAINT LOUIS, MO 63131

Provider Details

NPI 1205978632
Specialty Physician Assistant
Credentials P.A.-C, MMS
Gender Female
NPI Issued 02/13/2007

Hospital and facility affiliations

Facilities where LEIGH DUNN, P.A.-C, MMS 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.

PHYSICIAN GROUPS LC
SAINT LOUIS, MO

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

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

699
Total Claims
$65K
Total Drug Cost
244
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,039
Total Day Supply
25,425
Generic Drug Cost
$8K
Antibiotic Claims
101

Patient Demographics

Average Patient Age
75.3 years
Avg HCC Risk Score
1.15
Gender Split
59% female / 41% 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
Prednisone
53
Ozempic
Semaglutide
26
Amlodipine Besylate
25
Metformin Hcl Er
Metformin Hcl
25
Cephalexin
24
Azithromycin
21
Doxycycline Hyclate
21
Irbesartan
21
Trazodone Hcl
21
Escitalopram Oxalate
19

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

Physician Assistant Overview

How LEIGH DUNN, P.A.-C, MMS fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

LEIGH DUNN, P.A.-C, MMS's 699 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in Missouri

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

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

Frequently Asked Questions

What is LEIGH DUNN, P.A.-C, MMS's specialty?
LEIGH DUNN, P.A.-C, MMS specializes in Physician Assistant and practices in SAINT LOUIS, Missouri. Credentials: P.A.-C, MMS.
How much does LEIGH DUNN, P.A.-C, MMS prescribe under Medicare Part D?
In 2023, LEIGH DUNN, P.A.-C, MMS wrote 699 Medicare Part D claims totaling $65K in drug costs for 244 beneficiaries.
Where is LEIGH DUNN, P.A.-C, MMS located?
LEIGH DUNN, P.A.-C, MMS is located at 3009 N BALLAS RD, SAINT LOUIS, MO, 63131. Phone: (314) 996-5900.
What is LEIGH DUNN, P.A.-C, MMS's NPI number?
LEIGH DUNN, P.A.-C, MMS's National Provider Identifier (NPI) is 1205978632, issued on 02/13/2007.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does LEIGH DUNN, P.A.-C, MMS prescribe most often?
Based on 2023 Medicare Part D data, LEIGH DUNN, P.A.-C, MMS's most frequently prescribed drugs include Prednisone, Ozempic, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LEIGH DUNN, P.A.-C, MMS accept Medicare?
LEIGH DUNN, P.A.-C, MMS appears in CMS Medicare data with 699 Part D claims and 244 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LEIGH DUNN, P.A.-C, MMS's credentials?
LEIGH DUNN, P.A.-C, MMS's NPI is 1205978632 with credentials P.A.-C, MMS. 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.
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