2026 NPPES data Specialist NPI 1336653567 PA-C
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IWONA GASIOR, PA-C

Specialist in GREENWOOD, 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 · 339 beneficiaries · Specialist avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$85.93
4 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: IWONA GASIOR, PA-C is a Specialist ([object Object]) practicing in GREENWOOD, South Carolina with a Medicare Part D prescribing footprint of 1K claims across 339 beneficiaries — 9% brand-name prescribing . Industry payments of $85.93 across 4 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: IWONA GASIOR, PA-C filed 1,476 Medicare Part D claims in 2023 across GREENWOOD, South Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

IWONA GASIOR, PA-C at a glance

Quality data not reported

NPI registry status

Active

Issued 11/27/2017

NPI 1336653567

Primary specialty

Specialist

High-volume

69,658 US NPIs in this specialty

Medicare Part D claims

1,476 0% vs specialty avg

2023 prescription claims

Specialty avg: 1,474

Specialty distribution in South Carolina

How Specialist compares to other specialties among South Carolina providers

South Carolina providers

Specialist share within South Carolina

1. Specialist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Specialist share within South Carolina

Specialty board-certification context

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

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

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

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

IWONA GASIOR, PA-C is a Specialist provider practicing in GREENWOOD, South Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1336653567. 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.

IWONA GASIOR, PA-C appears in the CMS NPPES registry as a Specialist provider holding PA-C credentials at 210 OVERLAND DR, GREENWOOD, SC, 29646, with a listed phone of (833) 365-7246. NPI 1336653567 was issued on 11/27/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GASIOR 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 1,476 prescription claims written by this provider, covering 339 Medicare beneficiaries and totaling roughly $114K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 72.1%. 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.

Specialist is a high-volume specialty nationwide, with 69,658 enrolled providers across 55 states and an average of 1,474 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

210 OVERLAND DR
GREENWOOD, SC 29646

Provider Details

NPI 1336653567
Specialty Specialist
Credentials PA-C
Gender Female
NPI Issued 11/27/2017

Hospital and facility affiliations

Facilities where IWONA GASIOR, 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.

PREMIER PAIN SOLUTIONS PLLC
EASLEY, 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 IWONA GASIOR, PA-C. Source: openpaymentsdata.cms.gov.

Total received

$86

Largest payer

Salix Pharmaceuticals, a division of Bausch Health US, 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 · Generic-heavy

IWONA GASIOR, PA-C — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 1,476 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.

1,476
Total Claims
$114K
Total Drug Cost
339
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,497
Total Day Supply
41,948
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$74K
Generic Drug Cost
$40K
Opioid Claims
1,064 (72.1% rate)

Patient Demographics

Average Patient Age
64.6 years
Avg HCC Risk Score
1.75
Gender Split
65% female / 35% male
Age Distribution
<65: 150, 65-74: 136, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
493
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
193
Oxycodone Hcl
98
Gabapentin
70
Tizanidine Hcl
55
Morphine Sulfate Er
Morphine Sulfate
53
Pregabalin
51
Cyclobenzaprine Hcl
47
Buprenorphine
44
Xtampza Er
Oxycodone Myristate
37

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

Specialist Overview

How IWONA GASIOR, PA-C fits within the Specialist landscape nationally.

69,658
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider

IWONA GASIOR, PA-C's 1,476 claims are above the specialty average of 1,474.

Nearby Specialist Providers in South Carolina

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

Compare Specialist nationally: see state-by-state distribution →

Frequently Asked Questions

What is IWONA GASIOR, PA-C's specialty?
IWONA GASIOR, PA-C specializes in Specialist and practices in GREENWOOD, South Carolina. Credentials: PA-C.
How much does IWONA GASIOR, PA-C prescribe under Medicare Part D?
In 2023, IWONA GASIOR, PA-C wrote 1,476 Medicare Part D claims totaling $114K in drug costs for 339 beneficiaries.
Where is IWONA GASIOR, PA-C located?
IWONA GASIOR, PA-C is located at 210 OVERLAND DR, GREENWOOD, SC, 29646. Phone: (833) 365-7246.
What is IWONA GASIOR, PA-C's NPI number?
IWONA GASIOR, PA-C's National Provider Identifier (NPI) is 1336653567, issued on 11/27/2017.
Does IWONA GASIOR, PA-C prescribe more brand-name or generic drugs?
IWONA GASIOR, PA-C's prescribing is 9% brand-name and 91% generic drugs by claim count, with $74K in brand drug costs.
Does IWONA GASIOR, PA-C prescribe opioids?
Yes, IWONA GASIOR, PA-C had 1,064 opioid claims in 2023 with an opioid prescribing rate of 72.1%.
How many Specialist providers are there in the US?
There are 69,658 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does IWONA GASIOR, PA-C prescribe most often?
Based on 2023 Medicare Part D data, IWONA GASIOR, PA-C's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does IWONA GASIOR, PA-C accept Medicare?
IWONA GASIOR, PA-C appears in CMS Medicare data with 1,476 Part D claims and 339 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify IWONA GASIOR, PA-C's credentials?
IWONA GASIOR, PA-C's NPI is 1336653567 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