NPI registry status
Active
2026 NPPES data Surgical Physician Assistant NPI 1780241539 PA-C
Verify on CMS → Caroline Williams, PA-C
Surgical Physician Assistant in Knoxville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,119 in Surgical 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
199
Medicare Part D claims · 117 beneficiaries · Surgical Physician Assistant avg: 316
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
82.3/100
▼ 1 pts below national avg 83.1 · Above neutral
Industry payments
$81.95
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Caroline Williams, PA-C reported a CMS MIPS final score of 82.3/100 - below the 83.1 national average - and filed 199 Medicare Part D claims in 2023.
- 82.3/100
- MIPS score · -1 vs avg
- 199
- Part D claims, 2023
- 88%
- generic prescribing
- $81.95
- 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.
Caroline Williams, PA-C's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
82 39th percentile higher than 39% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Caroline Williams, PA-C sits
This provider among surgical physician assistant peers
Across the 3,708 surgical physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Caroline Williams, PA-C writes more Part D claims than 61% of them and scores higher on MIPS quality than 35% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one surgical physician assistant peer from a representative sample of 60; the gold marker is Caroline Williams, PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Caroline Williams, PA-C?
Near national averagePrimary specialty
Surgical Physician Assistant
Medicare Part D claims
199 37% vs specialty avg
MIPS final score
82.3/100 0.8 pts vs avg
Specialty distribution in Tennessee
How Surgical Physician Assistant compares to other specialties among Tennessee providers
Medicare quality performance, MIPS
Caroline Williams, PA-C's 2023 MIPS final score plotted against the Surgical Physician Assistant national average
- MIPS Final Score
- 82.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Surgical Physician Assistant) - 82.3/100 vs national avg 83.1
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).
Caroline Williams, PA-C appears in the CMS NPPES registry as a Surgical Physician Assistant provider holding PA-C credentials at 6408 PAPERMILL DR, Knoxville, TN, 37919, with a listed phone of (865) 588-8229. NPI 1780241539 was issued on 05/28/2019.
Medicare Part D records for calendar year 2023 show 199 prescription claims written by this provider, covering 117 Medicare beneficiaries and totaling roughly $16K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 36.7%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 82.3/100 for the 2023 performance year (Quality 77.1, Cost 70.9), compared with the national average of 83.1.
Surgical Physician Assistant is a mid-sized specialty nationwide, with 16,119 enrolled providers across 54 states and an average of 316 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 | 1780241539 |
|---|---|
| Specialty | Surgical Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 05/28/2019 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
82.3437
Final Score
Avg: 83.1
77.1485
Quality
70.8919
Cost
86
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Caroline Williams, 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 Surgical Associates PLLC
Knoxville, TN
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 Caroline Williams, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$82
Largest payer
ShockWave Medical, 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 · Typical
Caroline Williams, PA-C - brand share 12.0%
Surgical Physician Assistant average
12% brand-name claims vs 88% generic, on 199 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.
199
Total Claims
$16K
Total Drug Cost
117
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 279
- Total Day Supply
- 5,797
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $14K
- Generic Drug Cost
- $2K
- Opioid Claims
- 73 (36.7% rate)
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 1.82
- Gender Split
- 44% female / 56% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Caroline Williams, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clopidogrel
Clopidogrel
62 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
30 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
29 claims
- Eliquis 14
Eliquis
14 claims
- Tramadol Hcl 11
Tramadol Hcl
11 claims
| Drug | Claims |
|---|---|
| Clopidogrel Clopidogrel Bisulfate | 62 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 30 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 29 |
| Eliquis Apixaban | 14 |
| Tramadol Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgical Physician Assistant Overview
How Caroline Williams, PA-C fits within the Surgical Physician Assistant landscape nationally.
16,119
Surgical Physician Assistant Providers in US
54
States with Surgical Physician Assistant
316
Avg Claims per Provider
Caroline Williams, PA-C's 199 claims are below the specialty average of 316.
Nearby Surgical Physician Assistant Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Williams.
Mattye Adams
Nashville, TN
Katiuska Alvarado
Brentwood, TN
Dr. Carla Anderson
PA-C
Memphis, TN
Dr. Morgan Anderson
PA-C
Knoxville, TN
Dr. Erica Angelino
PA-C
Chattanooga, TN
Compare Surgical 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 Tennessee medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Surgical 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 Caroline Williams, PA-C's specialty? ▼
Caroline Williams, PA-C specializes in Surgical Physician Assistant and practices in Knoxville, Tennessee. Credentials: PA-C.
How much does Caroline Williams, PA-C prescribe under Medicare Part D? ▼
In 2023, Caroline Williams, PA-C wrote 199 Medicare Part D claims totaling $16K in drug costs for 117 beneficiaries.
What is Caroline Williams, PA-C's Medicare quality score? ▼
Caroline Williams, PA-C has a CMS MIPS Final Score of 82.3/100 (Quality: 77.1, Cost: 70.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Caroline Williams, PA-C located? ▼
Caroline Williams, PA-C is located at 6408 PAPERMILL DR, Knoxville, TN, 37919. Phone: (865) 588-8229.
What is Caroline Williams, PA-C's NPI number? ▼
Caroline Williams, PA-C's National Provider Identifier (NPI) is 1780241539, issued on 05/28/2019.
Does Caroline Williams, PA-C prescribe more brand-name or generic drugs? ▼
Caroline Williams, PA-C's prescribing is 12% brand-name and 88% generic drugs by claim count, with $14K in brand drug costs.
Does Caroline Williams, PA-C prescribe opioids? ▼
Yes, Caroline Williams, PA-C had 73 opioid claims in 2023 with an opioid prescribing rate of 36.7%.
How many Surgical Physician Assistant providers are there in the US? ▼
There are 16,119 Surgical Physician Assistant providers across 54 states in the US. The average Surgical Physician Assistant provider writes 316 Medicare Part D claims per year.
What drugs does Caroline Williams, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Caroline Williams, PA-C's most frequently prescribed drugs include Clopidogrel, Oxycodone-Acetaminophen, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Caroline Williams, PA-C accept Medicare? ▼
Caroline Williams, PA-C appears in CMS Medicare data with 199 Part D claims and 117 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Caroline Williams, PA-C's credentials? ▼
Caroline Williams, PA-C's NPI is 1780241539 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
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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.