Randal E. Williams, P.A.-C
Medical Physician Assistant · Castle Rock, CO
Randal E. Williams, P.A.-C is a medical physician assistant with a practice address in Castle Rock, Colorado, and NPI 1811966385, issued on Mar 16, 2006. Check the license (Colorado PA.0001279, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Randal E. Williams
- Credential
- P.A.-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License numbers
- PA.0001279 CO
15-00965 KS
PA2010-0073 NM
Self-reported in NPPES; status is on the state search - Practice location
- 1001 S Perry St, Castle Rock, CO 80104
- Phone
- (303) 688-2228
- Enumerated
- Mar 16, 2006
- Record last updated
- Apr 24, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (303) 663-0640
- Medicaid IDs
- 71577289 NM
200362810A KS
95256237 CO - Medicare enrollment
- Enrolled (PECOS I20050419000149); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 1001 S Perry St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paige Schultz, LCSWClinical Social Worker1568784171
- Michael StowellPhysician Assistant1164063541
- Rita Thieme, M.D.Pediatric Adolescent Medicine Physician1932187804
Verify Randal E. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license PA.0001279Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average medical physician assistant in 2024
197 Medicare Part D claims for 147 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin24 claims
- Amoxicillin-Clavulanate Potass20 claims
- Mupirocin16 claims
- Paxlovid14 claims
- Nitrofurantoin Mono-Macro13 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.
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Poudre Valley Medical Group LLCCastle Rock, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Medical Physician Assistant providers in Colorado
There are 1,308 medical physician assistant records in Colorado.
Other medical physician assistant records in Colorado
- Jennifer Abraham, PA-CFort Collins, CO1194121657
- Timothy Adair, PADenver, CO1356485072
- Whitney Adair, MPAS, PA-CAurora, CO1972996890
- Ashley Adams, PA-CGlenwood Springs, CO1982258190
- Bryan Adams, PAAurora, CO1386225662
- Meagan Adams, PA-CAurora, CO1104532241
- Timothy Ahearne, PA-CAurora, CO1396148151
- Amy Akerman, PA-CAurora, CO1922326024
- Brooke Albert, PA-CGolden, CO1932622719
- Marcy Albert, PA-CDenver, CO1497177794
Common questions
What is Randal E. Williams, P.A.-C's NPI number?
Randal E. Williams, P.A.-C's National Provider Identifier (NPI) is 1811966385, issued on Mar 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Randal E. Williams, P.A.-C located?
The NPPES record lists a practice address at 1001 S Perry St, Castle Rock, CO, 80104. Phone: (303) 688-2228. Providers update this record themselves, so call before visiting.
How can I verify Randal E. Williams, P.A.-C's license?
NPPES lists Colorado license number PA.0001279, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
How much does Randal E. Williams, P.A.-C prescribe under Medicare Part D?
In 2024, Randal E. Williams, P.A.-C had 197 Medicare Part D claims for 147 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Randal E. Williams, P.A.-C's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.