Castyn Rose Williams, PA
Physician Assistant · Grand Rapids, MI
Castyn Rose Williams, PA is a physician assistant with a practice address in Grand Rapids, Michigan, and NPI 1306329776, issued on Sep 12, 2018. Check the license (Michigan 5601008889, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Castyn Rose Williams
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 5601008889 MI
Self-reported in NPPES; status is on the state search - Practice location
- 221 Michigan St NE Ste 300, Grand Rapids, MI 49503
- Phone
- (616) 459-7258
- Enumerated
- Sep 12, 2018
- Record last updated
- Apr 3, 2023
- Medicare enrollment
- Enrolled (PECOS I20181205003329); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 6,989 in Michigan → Look up another NPI →
Also registered at 221 Michigan St NE Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Castyn Rose Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 5601008889Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 100 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).
Industry payments in 2024: $125.07
1 payment: food and beverage; the largest payer was Atricure, 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 one group practice
- Spectrum Health Primary Care PartnersGrand Rapids, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Castyn Rose Williams among 6,989 physician assistant records in Michigan
Castyn Rose Williams, PA is one of 6,989 physician assistant records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 56% of them.
- NPI issued2018 · 56% of these records are older, 39% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2018 · median 2017 among the 4,739 with a school on file
- Record last updated2023 · 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
913 physician assistant records list a practice address in Grand Rapids
They are 913 of the 18,005 NPPES records with a practice address in Grand Rapids, and 6,989 physician assistant records in Michigan.
All 6,989 in Michigan → Every provider in Grand Rapids → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Lisa Berger, P.A.Grand Rapids, MI 495031497729172
- Barbara Blakely, PA-CGrand Rapids, MI 495031649255563
- Sarah Bleyenberg, PA-CGrand Rapids, MI 495031174504088
- Laura Bolenz-Geesin, PA-CGrand Rapids, MI 495031811982283
- Joel Heagle, PA-CGrand Rapids, MI 495031962497990
- John Hendricks, PA-CGrand Rapids, MI 495031992705610
- Carrie Jerow, MPAS, PA-CGrand Rapids, MI 495031033190285
- Jacqueline Johanson, P.A.-CGrand Rapids, MI 495031952304982
Common questions
What is Castyn Rose Williams, PA's NPI number?
Castyn Rose Williams, PA's National Provider Identifier (NPI) is 1306329776, issued on Sep 12, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Castyn Rose Williams, PA located?
The NPPES record lists a practice address at 221 Michigan St NE Ste 300, Grand Rapids, MI, 49503. Phone: (616) 459-7258. Providers update this record themselves, so call before visiting.
How can I verify Castyn Rose Williams, PA's license?
NPPES lists Michigan license number 5601008889, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
What is Castyn Rose Williams, PA's MIPS final score?
The 2023 MIPS final score is 100 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.