William Michael Ahrens, MD
Family Medicine Physician · Grand Rapids, MI
William Michael Ahrens, MD is a family medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1417994088, issued on Jun 1, 2006. Check the license (Michigan 4301078260, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- William Michael Ahrens
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4301078260 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1471 E Beltline Ave NE, Grand Rapids, MI 49525
- Phone
- (616) 685-8620
- Enumerated
- Jun 1, 2006
- Record last updated
- Apr 12, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (616) 447-7674
- Medicare enrollment
- Enrolled (PECOS I20040820000796); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Human Medicine, 2001
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,013 in Michigan → Look up another NPI →
Also registered at 1471 E Beltline Ave NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Michael Ahrens in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301078260Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average family medicine physician in 2024
3,685 Medicare Part D claims for 275 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 262 claims were for opioids.
Most prescribed
- Atorvastatin Calcium245 claims
- Hydrocodone-Acetaminophen161 claims
- Lisinopril161 claims
- Levothyroxine Sodium150 claims
- Amlodipine Besylate139 claims
- Losartan Potassium113 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
- Advantage Health/saint Mary's Medical GroupCaledonia, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Michael Ahrens among 6,013 family medicine physician records in Michigan
William Michael Ahrens, MD is one of 6,013 family medicine physician records with a practice address in Michigan. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 56% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2001 · median 2008 among the 3,493 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
317 family medicine physician records list a practice address in Grand Rapids
They are 317 of the 18,005 NPPES records with a practice address in Grand Rapids, and 6,013 family medicine physician records in Michigan.
All 6,013 in Michigan → Every provider in Grand Rapids → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Philip Baty, MDGrand Rapids, MI 495251518918499
- Matthew Boutell, MDGrand Rapids, MI 495251043210818
- Jill Bultje, MDGrand Rapids, MI 495251568414241
- Mario Cesario, MDGrand Rapids, MI 495251124093679
- Diane Culik, MDGrand Rapids, MI 495251053378034
- John Duhn, DOGrand Rapids, MI 495251821043613
- Saleh Dyke, MDGrand Rapids, MI 495251477511145
- Paul Elsen, MDGrand Rapids, MI 495251073567178
Common questions
What is William Michael Ahrens, MD's NPI number?
William Michael Ahrens, MD's National Provider Identifier (NPI) is 1417994088, issued on Jun 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Michael Ahrens, MD located?
The NPPES record lists a practice address at 1471 E Beltline Ave NE, Grand Rapids, MI, 49525. Phone: (616) 685-8620. Providers update this record themselves, so call before visiting.
How can I verify William Michael Ahrens, MD's license?
NPPES lists Michigan license number 4301078260, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Michael Ahrens, MD prescribe under Medicare Part D?
In 2024, William Michael Ahrens, MD had 3,685 Medicare Part D claims for 275 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.