William Henry Baer, M.D.
Internal Medicine Physician · Grand Rapids, MI
William Henry Baer, M.D. is an internal medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1184731333, issued on Aug 24, 2006. Check the license (Michigan 4301065896, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- William Henry Baer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301065896 MI
Self-reported in NPPES; status is on the state search - Practice location
- 260 Jefferson Ave SE, Grand Rapids, MI 49503
- Phone
- (616) 685-3100
- Enumerated
- Aug 24, 2006
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (616) 685-3111
- Medicaid ID
- 3471741 MI
- Medicare enrollment
- Enrolled (PECOS I20100916000449); accepts Medicare assignment
- Medical or professional school
- West Virginia University School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 260 Jefferson Ave SE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa AlfriendClinical Social Worker1912278433
- Gabrielle Grace, LMSWClinical Social Worker1649900689
- Amanda Graves, LLMSWSocial Worker1316774037
- Rebecca Luders, NP-CFamily Nurse Practitioner1114172921
- Soumya Madala, M.D.Sleep Medicine (Internal Medicine) Physician1043334527
- Emily Soto, PSSPeer Specialist1346030400
Verify William Henry Baer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301065896Check 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% more Medicare Part D claims than the average internal medicine physician in 2024
3,411 Medicare Part D claims for 181 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 65 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium189 claims
- Levothyroxine Sodium183 claims
- Atorvastatin Calcium147 claims
- Trazodone Hcl111 claims
- Amlodipine Besylate107 claims
- Pantoprazole Sodium71 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: $447.80
42 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 Physical Rehabilitation And Therapy LPGrand Rapids, MI
- Center For Physical Rehabilitation IncGrand Rapids, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Henry Baer among 5,735 internal medicine physician records in Michigan
William Henry Baer, M.D. is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1995 · median 2006 among the 3,564 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
451 internal medicine physician records list a practice address in Grand Rapids
They are 451 of the 18,005 NPPES records with a practice address in Grand Rapids, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Grand Rapids → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vikas Bajpai, MDGrand Rapids, MI 495031407854458
- Jayne Courts, M.D.Grand Rapids, MI 495031518931500
- Josip Divic, MDGrand Rapids, MI 495031770587305
- Mark Evenhouse, M.D.Grand Rapids, MI 495031053386367
- Robert Jarve, MDGrand Rapids, MI 495031285639161
- Rajendra Katragadda, MDGrand Rapids, MI 495031811974017
- Patricia Lagrand, MDGrand Rapids, MI 495031215931258
- Gerald Lee, MDGrand Rapids, MI 495031265437420
Common questions
What is William Henry Baer, M.D.'s NPI number?
William Henry Baer, M.D.'s National Provider Identifier (NPI) is 1184731333, issued on Aug 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Henry Baer, M.D. located?
The NPPES record lists a practice address at 260 Jefferson Ave SE, Grand Rapids, MI, 49503. Phone: (616) 685-3100. Providers update this record themselves, so call before visiting.
How can I verify William Henry Baer, M.D.'s license?
NPPES lists Michigan license number 4301065896, 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 Henry Baer, M.D. prescribe under Medicare Part D?
In 2024, William Henry Baer, M.D. had 3,411 Medicare Part D claims for 181 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.