Andrea Margaret Williams, PA-C
Physician Assistant · Thornton, CO
Andrea Margaret Williams, PA-C is a physician assistant with a practice address in Thornton, Colorado, and NPI 1639957871, issued on Sep 19, 2023. Check the license (Colorado PA.0007992, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Andrea Margaret Williams
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA.0007992 CO
Self-reported in NPPES; status is on the state search - Practice location
- 9005 Grant St Ste 200, Thornton, CO 80229
- Phone
- (303) 287-2800
- Enumerated
- Sep 19, 2023
- Record last updated
- Apr 23, 2026
- Fax
- (303) 287-7357
- Medicare enrollment
- Enrolled (PECOS I20231031003913); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,767 in Colorado → Look up another NPI →
Also registered at 9005 Grant St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Al-Attar, MDOrthopaedic Surgery of the Spine Physician1871013714
- Jennifer Beck, MDSports Medicine (Orthopaedic Surgery) Physician1184887069
- Natalia BehnkenPhysician Assistant1689293557
- William Buck, PT, DPTPhysical Therapist1962869131
- Michael Cain, M.D.Orthopaedic Surgery Physician1366706129
- Alexander Cotter, MDPain Medicine (Physical Medicine & Rehabilitation) Physician1326435835
Verify Andrea Margaret 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.0007992Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average physician assistant in 2024
859 Medicare Part D claims for 269 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims. 224 claims were for opioids.
Most prescribed
- Meloxicam225 claims
- Oxycodone Hcl120 claims
- Amoxicillin78 claims
- Tramadol Hcl74 claims
- Ondansetron Odt63 claims
- Methocarbamol61 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: $210.08
9 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. 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.
Bills Medicare through 2 group practices
- Center For Spine And Orthopedics PCThornton, CO
- Select Physical Therapy OF West Denver Limited PartnershipDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrea Margaret Williams among 3,767 physician assistant records in Colorado
Andrea Margaret Williams, PA-C is one of 3,767 physician assistant records with a practice address in Colorado. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 84% of them.
- NPI issued2023 · 84% of these records are older, 11% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2023 · median 2017 among the 2,351 with a school on file
- Record last updated2026 · 40% 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 Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
61 physician assistant records list a practice address in Thornton
They are 61 of the 2,234 NPPES records with a practice address in Thornton, and 3,767 physician assistant records in Colorado.
All 3,767 in Colorado → Every provider in Thornton → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Emily Battista, PA-CThornton, CO 802291639329568
- Robert Botnick, PAThornton, CO 802291275620155
- Ana Burrows, PA-CThornton, CO 802291740335801
- Megan CrawfordThornton, CO 802291508958539
- Ryan Mansholt, PACThornton, CO 802291366514127
- Deterri RockwellThornton, CO 802291275518540
- Darren Roth, PA-CThornton, CO 802291164689519
- Catherine Salguero, PAThornton, CO 802291861535494
Common questions
What is Andrea Margaret Williams, PA-C's NPI number?
Andrea Margaret Williams, PA-C's National Provider Identifier (NPI) is 1639957871, issued on Sep 19, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Andrea Margaret Williams, PA-C located?
The NPPES record lists a practice address at 9005 Grant St Ste 200, Thornton, CO, 80229. Phone: (303) 287-2800. Providers update this record themselves, so call before visiting.
How can I verify Andrea Margaret Williams, PA-C's license?
NPPES lists Colorado license number PA.0007992, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
How much does Andrea Margaret Williams, PA-C prescribe under Medicare Part D?
In 2024, Andrea Margaret Williams, PA-C had 859 Medicare Part D claims for 269 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.