Caroline M. Keyser, PA
Physician Assistant · Winchester, VA
Caroline M. Keyser, PA is a physician assistant with a practice address in Winchester, Virginia, and NPI 1609338078, issued on Apr 3, 2019. Check the license (Virginia 0110-006606, as entered in NPPES) with the Virginia board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Caroline M. Keyser
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 0110-006606 VA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Campus Blvd Ste 210, Winchester, VA 22601
- Phone
- (540) 536-3470
- Enumerated
- Apr 3, 2019
- Record last updated
- Apr 24, 2023
- Fax
- (540) 536-3471
- Medicare enrollment
- Enrolled (PECOS I20190615000226); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,408 in Virginia → Look up another NPI →
Also registered at 400 Campus Blvd Ste 210
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Caroline M. Keyser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Virginia board licenses this profession
Search for license 0110-006606Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average physician assistant in 2024
297 Medicare Part D claims for 105 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 35 claims were for opioids.
Most prescribed
- Metronidazole35 claims
- Neomycin Sulfate31 claims
- Oxycodone Hcl30 claims
- Creon27 claims
- Enoxaparin Sodium26 claims
- Promethazine Hcl24 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $29.77
1 payment: food and beverage; the largest payer was Avita Medical Americas, Llc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Winchester Medical CenterWinchester, VA · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Caroline M. Keyser among 4,408 physician assistant records in Virginia
Caroline M. Keyser, PA is one of 4,408 physician assistant records with a practice address in Virginia. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 54% of them.
- NPI issued2019 · 54% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2019 · median 2018 among the 2,885 with a school on file
- Record last updated2023 · 33% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
217 physician assistant records list a practice address in Winchester
They are 217 of the 2,762 NPPES records with a practice address in Winchester, and 4,408 physician assistant records in Virginia.
All 4,408 in Virginia → Every provider in Winchester → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jill Bethlehem, PAWinchester, VA 226011548216971
- Tammy Earhart, PA-CWinchester, VA 226011275552622
- Dondrea Garrison, PA-CWinchester, VA 226011558323253
- Alyson Humphreys, PA-CWinchester, VA 226011508874033
- Thomas Kidd, PACWinchester, VA 226011053321075
- Michael Lapp, PAWinchester, VA 226011295789469
- Tamara McDaniel, PA-CWinchester, VA 226011154349801
- Jennifer Miller, PA-CWinchester, VA 226011801828702
Common questions
What is Caroline M. Keyser, PA's NPI number?
Caroline M. Keyser, PA's National Provider Identifier (NPI) is 1609338078, issued on Apr 3, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Caroline M. Keyser, PA located?
The NPPES record lists a practice address at 400 Campus Blvd Ste 210, Winchester, VA, 22601. Phone: (540) 536-3470. Providers update this record themselves, so call before visiting.
How can I verify Caroline M. Keyser, PA's license?
NPPES lists Virginia license number 0110-006606, as entered by the provider. Search the Virginia board that licenses this profession; the NPPES record confirms identity only.
How much does Caroline M. Keyser, PA prescribe under Medicare Part D?
In 2024, Caroline M. Keyser, PA had 297 Medicare Part D claims for 105 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.