2026 NPPES data Medical Physician Assistant NPI 1508001397 PA-C
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MARY ANNE ROBINSON, PA-C

Medical Physician Assistant in LEWES, Delaware. 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
718
Medicare Part D claims · 349 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
77.7395/100
▼ 5 pts below national avg 83.1 · [object Object]
Industry payments
$2.1K
111 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: MARY ANNE ROBINSON, PA-C is a Medical Physician Assistant ([object Object]) practicing in LEWES, Delaware with a Medicare Part D prescribing footprint of 718 claims across 349 beneficiaries — 5% brand-name prescribing . Their CMS MIPS Final Score of 77.7395/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $2.1K across 111 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: MARY ANNE ROBINSON, PA-C reported a CMS MIPS final score of 77.7395 out of 100, below the 83.1 national average, and filed 718 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

MARY ANNE ROBINSON, PA-C at a glance

Below national average

NPI registry status

Active

Issued 12/08/2008

NPI 1508001397

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

718 33% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

MIPS final score

77.7395/100 5.360499999999988% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Delaware

How Medical Physician Assistant compares to other specialties among Delaware providers

Delaware providers

Medical Physician Assistant share within Delaware

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

Medicare quality performance — MIPS

MARY ANNE ROBINSON, PA-C's 2023 MIPS final score plotted against the Medical Physician Assistant national average

Below national average
MIPS Final Score
77.7395/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Medical Physician Assistant) — 77.7395/100 vs national avg 83.1

0%100%National avg83%77.7%
MIPS final score (Medical Physician Assistant) — 77.7395/100 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).

MARY ANNE ROBINSON, PA-C is a Medical Physician Assistant provider practicing in LEWES, Delaware, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1508001397. 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.

MARY ANNE ROBINSON, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 750 KINGS HWY, LEWES, DE, 19958, with a listed phone of (302) 644-6400. NPI 1508001397 was issued on 12/08/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ROBINSON 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 718 prescription claims written by this provider, covering 349 Medicare beneficiaries and totaling roughly $147K in drug spend, split 5% brand-name and 95% generic by claim count. 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 77.7395/100 for the 2023 performance year (Quality 94.043, Cost 33.741), compared with the national average of 83.1.

Medical Physician Assistant is a mid-sized specialty nationwide, with 40,527 enrolled providers across 55 states and an average of 1,077 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

750 KINGS HWY
LEWES, DE 19958

Provider Details

NPI 1508001397
Specialty Medical Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 12/08/2008

CMS Quality Score (MIPS)

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

77.7395
Final Score
Avg: 83.1
94.043
Quality
33.741
Cost

Reporting: Group practice

Hospital and facility affiliations

Facilities where MARY ANNE ROBINSON, PA-C 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.

EASTON DERMATOLOGY ASSOCIATES, LLC
EASTON, MD

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 MARY ANNE ROBINSON, PA-C. Source: openpaymentsdata.cms.gov.

Total received

$2.1K

Largest payer

Janssen Biotech, 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.

Brand vs generic prescribing mix · Generic-heavy

MARY ANNE ROBINSON, PA-C — brand share 5.0%
Specialty average (est.)

5% brand-name claims vs 95% generic, on 718 2023 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 2023.

718
Total Claims
$147K
Total Drug Cost
349
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
829
Total Day Supply
21,326
Brand vs Generic
5% brand / 95% generic
Brand Drug Cost
$118K
Generic Drug Cost
$29K
Antibiotic Claims
64

Patient Demographics

Average Patient Age
73.6 years
Avg HCC Risk Score
0.94
Gender Split
64% female / 36% male
Age Distribution
<65: 24, 65-74: 165, 75-84: 128, 85+: 32

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Clobetasol Propionate
142
Triamcinolone Acetonide
136
Ketoconazole
53
Ciclopirox
Ciclopirox Olamine
38
Metronidazole
34
Doxycycline Hyclate
32
Hydrocortisone
30
Mupirocin
30
Valacyclovir
Valacyclovir Hcl
18
Betamethasone Dipropionate
17

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

Medical Physician Assistant Overview

How MARY ANNE ROBINSON, PA-C fits within the Medical Physician Assistant landscape nationally.

40,527
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider

MARY ANNE ROBINSON, PA-C's 718 claims are below the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in Delaware

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

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

Frequently Asked Questions

What is MARY ANNE ROBINSON, PA-C's specialty?
MARY ANNE ROBINSON, PA-C specializes in Medical Physician Assistant and practices in LEWES, Delaware. Credentials: PA-C.
How much does MARY ANNE ROBINSON, PA-C prescribe under Medicare Part D?
In 2023, MARY ANNE ROBINSON, PA-C wrote 718 Medicare Part D claims totaling $147K in drug costs for 349 beneficiaries.
What is MARY ANNE ROBINSON, PA-C's Medicare quality score?
MARY ANNE ROBINSON, PA-C has a CMS MIPS Final Score of 77.7395/100 (Quality: 94.043, Cost: 33.741). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is MARY ANNE ROBINSON, PA-C located?
MARY ANNE ROBINSON, PA-C is located at 750 KINGS HWY, LEWES, DE, 19958. Phone: (302) 644-6400.
What is MARY ANNE ROBINSON, PA-C's NPI number?
MARY ANNE ROBINSON, PA-C's National Provider Identifier (NPI) is 1508001397, issued on 12/08/2008.
Does MARY ANNE ROBINSON, PA-C prescribe more brand-name or generic drugs?
MARY ANNE ROBINSON, PA-C's prescribing is 5% brand-name and 95% generic drugs by claim count, with $118K in brand drug costs.
How many Medical Physician Assistant providers are there in the US?
There are 40,527 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does MARY ANNE ROBINSON, PA-C prescribe most often?
Based on 2023 Medicare Part D data, MARY ANNE ROBINSON, PA-C's most frequently prescribed drugs include Clobetasol Propionate, Triamcinolone Acetonide, Ketoconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARY ANNE ROBINSON, PA-C accept Medicare?
MARY ANNE ROBINSON, PA-C appears in CMS Medicare data with 718 Part D claims and 349 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARY ANNE ROBINSON, PA-C's credentials?
MARY ANNE ROBINSON, PA-C's NPI is 1508001397 with credentials PA-C. 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