Haley Zimmer, M.D.
Internal Medicine Physician · Grand Rapids, MI
Haley Zimmer, M.D. is an internal medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1932580883, issued on Jun 17, 2015. Check the license (Michigan 4301107547, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Haley Zimmer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301107547 MI
Self-reported in NPPES; status is on the state search - Practice location
- 25 Michigan St NE, Grand Rapids, MI 49503
- Phone
- (616) 391-3777
- Enumerated
- Jun 17, 2015
- Record last updated
- Oct 29, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 25 Michigan St NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amal Ashraf, M.D.Internal Medicine Physician1164653275
Verify Haley Zimmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301107547Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,682 Medicare Part D claims for 131 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 46 claims were for opioids.
Most prescribed
- Lisinopril91 claims
- Atorvastatin Calcium83 claims
- Amlodipine Besylate78 claims
- Hydrochlorothiazide63 claims
- Omeprazole61 claims
- Levothyroxine Sodium58 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.
Haley Zimmer among 5,735 internal medicine physician records in Michigan
Haley Zimmer, 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 2015, is newer than 66% of them.
- NPI issued2015 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2019 · 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 Haley Zimmer, M.D.'s NPI number?
Haley Zimmer, M.D.'s National Provider Identifier (NPI) is 1932580883, issued on Jun 17, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Haley Zimmer, M.D. located?
The NPPES record lists a practice address at 25 Michigan St NE, Grand Rapids, MI, 49503. Phone: (616) 391-3777. Providers update this record themselves, so call before visiting.
How can I verify Haley Zimmer, M.D.'s license?
NPPES lists Michigan license number 4301107547, 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 Haley Zimmer, M.D. prescribe under Medicare Part D?
In 2024, Haley Zimmer, M.D. had 1,682 Medicare Part D claims for 131 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.