2026 NPPES data Medical Physician Assistant NPI 1013081256 P.A.-C
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ERIN STEWART, P.A.-C

Medical Physician Assistant in AIKEN, South Carolina. 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
1K
Medicare Part D claims · 376 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$189.1
10 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ERIN STEWART, P.A.-C filed 1,340 Medicare Part D claims in 2023 as a Medical Physician Assistant in AIKEN, South Carolina, prescribing 87% generic.

1K
Part D claims, 2023
87%
generic prescribing
$189.1
industry payments (Sunshine Act)

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.

ERIN STEWART, P.A.-C's Medicare Part D volume vs every U.S. prescriber

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

1,340 Top 21% higher than 79% 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%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). This entry sits in this band. 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 ERIN STEWART, P.A.-C?

Quality data not reported

NPI registry status

Active

Issued 11/20/2006

NPI 1013081256

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

1,340 24% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

Specialty distribution in South Carolina

How Medical Physician Assistant compares to other specialties among South Carolina providers

South Carolina providers

Medical Physician Assistant share within South Carolina

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Medical 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).

ERIN STEWART, P.A.-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding P.A.-C credentials at 131 RINEHART WAY, AIKEN, SC, 29803, with a listed phone of (803) 335-2200. NPI 1013081256 was issued on 11/20/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what STEWART 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 1,340 prescription claims written by this provider, covering 376 Medicare beneficiaries and totaling roughly $117K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 1.9%. 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.

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

131 RINEHART WAY
AIKEN, SC 29803

Provider Details

NPI 1013081256
Specialty Medical Physician Assistant
Credentials P.A.-C
Gender Female
NPI Issued 11/20/2006

Hospital and facility affiliations

Facilities where ERIN STEWART, P.A.-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.

CENTER FOR PRIMARY CARE PC
NORTH AUGUSTA, SC

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 ERIN STEWART, P.A.-C. Source: openpaymentsdata.cms.gov.

Total received

$189

Largest payer

Lilly USA, LLC

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 · Typical

ERIN STEWART, P.A.-C — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 1,340 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.

1,340
Total Claims
$117K
Total Drug Cost
376
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,394
Total Day Supply
64,422
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$98K
Generic Drug Cost
$19K
Opioid Claims
25 (1.9% rate)
Antibiotic Claims
130

Patient Demographics

Average Patient Age
73.9 years
Avg HCC Risk Score
1.22
Gender Split
72% female / 28% male
Age Distribution
<65: 36, 65-74: 169, 75-84: 129, 85+: 42

Top Prescribed Drugs (Medicare Part D)

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

What ERIN STEWART, P.A.-C prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Prednisone
55
Eliquis
Apixaban
52
Levothyroxine Sodium
49
Metoprolol Succinate
43
Fluticasone Propionate
38
Losartan Potassium
34
Famotidine
33
Hydrochlorothiazide
32
Lisinopril
29
Nitrofurantoin Mono-Macro
Nitrofurantoin Monohyd/M-Cryst
29

* 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 ERIN STEWART, P.A.-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

ERIN STEWART, P.A.-C's 1,340 claims are above the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in South Carolina

Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as STEWART.

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

Frequently Asked Questions

What is ERIN STEWART, P.A.-C's specialty?
ERIN STEWART, P.A.-C specializes in Medical Physician Assistant and practices in AIKEN, South Carolina. Credentials: P.A.-C.
How much does ERIN STEWART, P.A.-C prescribe under Medicare Part D?
In 2023, ERIN STEWART, P.A.-C wrote 1,340 Medicare Part D claims totaling $117K in drug costs for 376 beneficiaries.
Where is ERIN STEWART, P.A.-C located?
ERIN STEWART, P.A.-C is located at 131 RINEHART WAY, AIKEN, SC, 29803. Phone: (803) 335-2200.
What is ERIN STEWART, P.A.-C's NPI number?
ERIN STEWART, P.A.-C's National Provider Identifier (NPI) is 1013081256, issued on 11/20/2006.
Does ERIN STEWART, P.A.-C prescribe more brand-name or generic drugs?
ERIN STEWART, P.A.-C's prescribing is 13% brand-name and 87% generic drugs by claim count, with $98K in brand drug costs.
Does ERIN STEWART, P.A.-C prescribe opioids?
Yes, ERIN STEWART, P.A.-C had 25 opioid claims in 2023 with an opioid prescribing rate of 1.9%.
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 ERIN STEWART, P.A.-C prescribe most often?
Based on 2023 Medicare Part D data, ERIN STEWART, P.A.-C's most frequently prescribed drugs include Prednisone, Eliquis, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ERIN STEWART, P.A.-C accept Medicare?
ERIN STEWART, P.A.-C appears in CMS Medicare data with 1,340 Part D claims and 376 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ERIN STEWART, P.A.-C's credentials?
ERIN STEWART, P.A.-C's NPI is 1013081256 with credentials P.A.-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.
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