Steven Westerhof, PAC
Physician Assistant · Muskegon, MI
Steven Westerhof, PAC is a physician assistant with a practice address in Muskegon, Michigan, and NPI 1508843251, issued on Dec 23, 2005. Check the license (Michigan 5601002123, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Steven Westerhof
- Credential
- PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 5601002123 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1223 Mercy Dr, Muskegon, MI 49444
- Phone
- (231) 672-3177
- Enumerated
- Dec 23, 2005
- Record last updated
- Aug 16, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101122000356); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 6,989 in Michigan → Look up another NPI →
Also registered at 1223 Mercy Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Valerie ConradFamily Medicine Physician1205020088
- Steven Dewit, FNPFamily Nurse Practitioner1063127108
- Ashley Dorton, PA-CPhysician Assistant1003300310
- Kathleen Gray, PAPhysician Assistant1578798096
Verify Steven Westerhof in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 5601002123Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.7 times the Medicare Part D claims of the average physician assistant in 2024
6,368 Medicare Part D claims for 374 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 525 claims were for opioids.
Most prescribed
- Atorvastatin Calcium261 claims
- Hydrocodone-Acetaminophen250 claims
- Gabapentin204 claims
- Lisinopril164 claims
- Omeprazole154 claims
- Albuterol Sulfate Hfa148 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.
Bills Medicare through one group practice
- Mercy Physician NetworkMuskegon, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Westerhof among 6,989 physician assistant records in Michigan
Steven Westerhof, PAC 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 98% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1992 · median 2017 among the 4,739 with a school on file
- Record last updated2012 · 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).
139 physician assistant records list a practice address in Muskegon
They are 139 of the 2,646 NPPES records with a practice address in Muskegon, and 6,989 physician assistant records in Michigan.
All 6,989 in Michigan → Every provider in Muskegon → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Brian Akre, PACNorton Shores, MI 494441629055405
- Angela Beezley, PACNorton Shores, MI 494441669424719
- Daniel Caldwell, PACMuskegon, MI 494441548247323
- Matthew Dundon, P.A.C.Muskegon, MI 494441770546194
- John Foss, PA-CMuskegon, MI 494441285680991
- Adam Geller, PACMuskegon, MI 494441285633172
- Dean Kendziera, PA-CMuskegon, MI 494441750382735
- Holly Knowles, PA-CMuskegon, MI 494441073549044
Common questions
What is Steven Westerhof, PAC's NPI number?
Steven Westerhof, PAC's National Provider Identifier (NPI) is 1508843251, issued on Dec 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Steven Westerhof, PAC located?
The NPPES record lists a practice address at 1223 Mercy Dr, Muskegon, MI, 49444. Phone: (231) 672-3177. Providers update this record themselves, so call before visiting.
How can I verify Steven Westerhof, PAC's license?
NPPES lists Michigan license number 5601002123, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Steven Westerhof, PAC prescribe under Medicare Part D?
In 2024, Steven Westerhof, PAC had 6,368 Medicare Part D claims for 374 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.