Robert Rex Williams, PA-C
Medical Physician Assistant · Puyallup, WA
Robert Rex Williams, PA-C is a medical physician assistant with a practice address in Puyallup, Washington, and NPI 1548685902, issued on Feb 21, 2014. Check the license with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Robert Rex Williams
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- Practice location
- 11102 Sunrise Blvd E, Puyallup, WA 98374
- Phone
- (253) 848-8797
- Enumerated
- Feb 21, 2014
- Record last updated
- Feb 21, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20230510000013); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 1,068 in Washington → Look up another NPI →
Also registered at 11102 Sunrise Blvd E
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Rex Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average medical physician assistant in 2024
113 Medicare Part D claims for 91 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone28 claims
- Amoxicillin-Clavulanate Potass17 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 practice group's MIPS final score for 2023 (Medicare payment program): 89.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $86.79
2 payments; by number, the most common kind was travel and lodging; the largest payer was Stryker Corporation. The 16,165 providers of this specialty with any payment received $1,055.00 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 one group practice
- Doctx1 PLLCLufkin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Rex Williams among 1,068 medical physician assistant records in Washington
Robert Rex Williams, PA-C is one of 1,068 medical physician assistant records with a practice address in Washington. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 67% of them.
- NPI issued2014 · 67% of these records are older, 28% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2013 · median 2013 among the 581 with a school on file
- Record last updated2014 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in Washington
There are 1,068 medical physician assistant records in Washington.
All 1,068 in Washington → Every provider in Puyallup → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Ngim Carmichael, PA-CPuyallup, WA 983741346522752
- Dorothy Gasner, PA-CPuyallup, WA 983741275258774
- Ryan Gonce, MPAS, PA-CPuyallup, WA 983741659643534
- Denise Gruchalla, PA-CPuyallup, WA 983741083653414
- Robert Hays, PA-CPuyallup, WA 983741427118801
- Karl Hilsenberg, PA-CPuyallup, WA 983741134140262
- Kyle Lewis, PA-CPuyallup, WA 983741457741688
- Scott NelsonPuyallup, WA 983741003218611
Common questions
What is Robert Rex Williams, PA-C's NPI number?
Robert Rex Williams, PA-C's National Provider Identifier (NPI) is 1548685902, issued on Feb 21, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Robert Rex Williams, PA-C located?
The NPPES record lists a practice address at 11102 Sunrise Blvd E, Puyallup, WA, 98374. Phone: (253) 848-8797. Providers update this record themselves, so call before visiting.
How can I verify Robert Rex Williams, PA-C's license?
Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Robert Rex Williams, PA-C prescribe under Medicare Part D?
In 2024, Robert Rex Williams, PA-C had 113 Medicare Part D claims for 91 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Robert Rex Williams, PA-C's MIPS final score?
The 2023 MIPS final score is 89.7 of 100, reported for the practice group. 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.