NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1013986009 P.A.
Verify on CMS → Mark Sink, P.A.
Physician Assistant in Aiken, South Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,974 in Physician Assistant, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
355
Medicare Part D claims · 180 beneficiaries · Physician Assistant avg: 790
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mark Sink, P.A. filed 355 Medicare Part D claims in 2023 as a Physician Assistant in Aiken, South Carolina, prescribing 96% generic.
- 355
- Part D claims, 2023
- 96%
- generic prescribing
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.
Mark Sink, P.A.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
355 Top 43% higher than 57% of 1,370,886 prescribers
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 Mark Sink, P.A.?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
355 55% vs specialty avg
Specialty distribution in South Carolina
How Physician Assistant compares to other specialties among South Carolina providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Physician Assistant. Verify directly:
How MIPS and board certification work
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).
Mark Sink, P.A. appears in the CMS NPPES registry as a Physician Assistant provider holding P.A. credentials at 302 UNIVERSITY PKWY, Aiken, SC, 29801, with a listed phone of (803) 641-5100. NPI 1013986009 was issued on 03/14/2006.
Medicare Part D records for calendar year 2023 show 355 prescription claims written by this provider, covering 180 Medicare beneficiaries and totaling roughly $5K in drug spend, split 4% brand-name and 96% generic by claim count, with an opioid prescribing rate of 25.1%.
Physician Assistant is a high-volume specialty nationwide, with 150,974 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
Provider Details
| NPI | 1013986009 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | P.A. |
| Gender | Male |
| NPI Issued | 03/14/2006 |
Brand vs generic prescribing mix · Generic-heavy
Mark Sink, P.A. - brand share 4.0%
Physician Assistant average
4% brand-name claims vs 96% generic, on 355 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.
355
Total Claims
$5K
Total Drug Cost
180
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 359
- Total Day Supply
- 3,463
- Brand vs Generic
- 4% brand / 96% generic
- Brand Drug Cost
- $2K
- Generic Drug Cost
- $3K
- Opioid Claims
- 89 (25.1% rate)
- Antibiotic Claims
- 83
Patient Demographics
- Average Patient Age
- 68.8 years
- Avg HCC Risk Score
- 1.42
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 51, 65-74: 73, 75-84: 39, 85+: 17
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Sink, P.A. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
73 claims
- Prednisone
Prednisone
37 claims
- Cephalexin
Cephalexin
35 claims
- Meloxicam 19
Meloxicam
19 claims
- Amoxicillin-Clavul… 16
Amoxicillin-Clavulanate Potass
16 claims
- Doxycycline Monohy… 11
Doxycycline Monohydrate
11 claims
- Ondansetron Odt 11
Ondansetron Odt
11 claims
- Orphenadrine Citra… 11
Orphenadrine Citrate Er
11 claims
| Drug | Claims |
|---|---|
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 73 |
| Prednisone | 37 |
| Cephalexin | 35 |
| Meloxicam | 19 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 16 |
| Doxycycline Monohydrate | 11 |
| Ondansetron Odt Ondansetron | 11 |
| Orphenadrine Citrate Er Orphenadrine Citrate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Mark Sink, P.A. fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Mark Sink, P.A.'s 355 claims are below 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 Sink.
Dr. Linda Aanonsen
PA
Conway, SC
Rund Abdelnabi
Piedmont, SC
Dr. Caitlin Abdullah
PA
Greenville, SC
Lana Abunijem
Greenville, SC
Dr. Megan Ackerson
PA-C
Columbia, SC
Compare Physician Assistant nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the South Carolina medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physician Assistant peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Mark Sink, P.A.'s specialty? ▼
Mark Sink, P.A. specializes in Physician Assistant and practices in Aiken, South Carolina. Credentials: P.A..
How much does Mark Sink, P.A. prescribe under Medicare Part D? ▼
In 2023, Mark Sink, P.A. wrote 355 Medicare Part D claims totaling $5K in drug costs for 180 beneficiaries.
Where is Mark Sink, P.A. located? ▼
Mark Sink, P.A. is located at 302 UNIVERSITY PKWY, Aiken, SC, 29801. Phone: (803) 641-5100.
What is Mark Sink, P.A.'s NPI number? ▼
Mark Sink, P.A.'s National Provider Identifier (NPI) is 1013986009, issued on 03/14/2006.
Does Mark Sink, P.A. prescribe more brand-name or generic drugs? ▼
Mark Sink, P.A.'s prescribing is 4% brand-name and 96% generic drugs by claim count, with $2K in brand drug costs.
Does Mark Sink, P.A. prescribe opioids? ▼
Yes, Mark Sink, P.A. had 89 opioid claims in 2023 with an opioid prescribing rate of 25.1%.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 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 Mark Sink, P.A. prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Sink, P.A.'s most frequently prescribed drugs include Oxycodone-Acetaminophen, Prednisone, Cephalexin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Sink, P.A. accept Medicare? ▼
Mark Sink, P.A. appears in CMS Medicare data with 355 Part D claims and 180 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Sink, P.A.'s credentials? ▼
Mark Sink, P.A.'s NPI is 1013986009 with credentials P.A.. 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
View source datasets and methodology notes
- 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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.