2026 NPPES data Physician Assistant NPI 1821689597 PA-C
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NEIL WINDHAM, PA-C

Physician Assistant in DARLINGTON, 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
3K
Medicare Part D claims · 670 beneficiaries · Physician Assistant avg: 790
Industry payments
$2.5K
156 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

NEIL WINDHAM, PA-C filed 3,244 Medicare Part D claims in 2023 as a Physician Assistant in DARLINGTON, South Carolina.

3K
Part D claims, 2023
$2.5K
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.

NEIL WINDHAM, PA-C's Medicare Part D volume vs every U.S. prescriber

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

3,244 Top 11% higher than 89% 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%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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 NEIL WINDHAM, PA-C?

Quality data not reported

NPI registry status

Active

Issued 01/26/2021

NPI 1821689597

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

3,244 311% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in South Carolina

How Physician Assistant compares to other specialties among South Carolina providers

South Carolina providers

Physician Assistant share within South Carolina

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

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).

NEIL WINDHAM, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 300 STEEL MILL RD, DARLINGTON, SC, 29540, with a listed phone of (843) 395-8613. NPI 1821689597 was issued on 01/26/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WINDHAM 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 3,244 prescription claims written by this provider, covering 670 Medicare beneficiaries and totaling roughly $180K in drug spend, with an opioid prescribing rate of 6.7%. 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

300 STEEL MILL RD
DARLINGTON, SC 29540

Provider Details

NPI 1821689597
Specialty Physician Assistant
Credentials PA-C
Gender Male
NPI Issued 01/26/2021

Hospital and facility affiliations

Facilities where NEIL WINDHAM, 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.

HARTSVILLE MEDICAL GROUP LLC
HARTSVILLE, 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 NEIL WINDHAM, PA-C. Source: openpaymentsdata.cms.gov.

Total received

$2.5K

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.

Medicare Part D Prescribing Data

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

3,244
Total Claims
$180K
Total Drug Cost
670
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,112
Total Day Supply
126,759
Generic Drug Cost
$43K
Opioid Claims
217 (6.7% rate)
Antibiotic Claims
495

Patient Demographics

Average Patient Age
72.1 years
Avg HCC Risk Score
1.07
Gender Split
60% female / 40% male
Age Distribution
<65: 81, 65-74: 329, 75-84: 217, 85+: 43

Top Prescribed Drugs (Medicare Part D)

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

What NEIL WINDHAM, PA-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
Azithromycin
182
Alprazolam
172
Dexamethasone
139
Prednisone
90
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
88
Tizanidine Hcl
79
Fluconazole
75
Levothyroxine Sodium
72
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
71
Doxycycline Monohydrate
68

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

Physician Assistant Overview

How NEIL WINDHAM, PA-C fits within the Physician Assistant landscape nationally.

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

NEIL WINDHAM, PA-C's 3,244 claims are above the specialty average of 790.

Nearby 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 WINDHAM.

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

Frequently Asked Questions

What is NEIL WINDHAM, PA-C's specialty?
NEIL WINDHAM, PA-C specializes in Physician Assistant and practices in DARLINGTON, South Carolina. Credentials: PA-C.
How much does NEIL WINDHAM, PA-C prescribe under Medicare Part D?
In 2023, NEIL WINDHAM, PA-C wrote 3,244 Medicare Part D claims totaling $180K in drug costs for 670 beneficiaries.
Where is NEIL WINDHAM, PA-C located?
NEIL WINDHAM, PA-C is located at 300 STEEL MILL RD, DARLINGTON, SC, 29540. Phone: (843) 395-8613.
What is NEIL WINDHAM, PA-C's NPI number?
NEIL WINDHAM, PA-C's National Provider Identifier (NPI) is 1821689597, issued on 01/26/2021.
Does NEIL WINDHAM, PA-C prescribe opioids?
Yes, NEIL WINDHAM, PA-C had 217 opioid claims in 2023 with an opioid prescribing rate of 6.7%.
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 NEIL WINDHAM, PA-C prescribe most often?
Based on 2023 Medicare Part D data, NEIL WINDHAM, PA-C's most frequently prescribed drugs include Azithromycin, Alprazolam, Dexamethasone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NEIL WINDHAM, PA-C accept Medicare?
NEIL WINDHAM, PA-C appears in CMS Medicare data with 3,244 Part D claims and 670 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NEIL WINDHAM, PA-C's credentials?
NEIL WINDHAM, PA-C's NPI is 1821689597 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.
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