Margarethe M. Maciulis, MD
Endocrinology, Diabetes & Metabolism Physician · Bay City, MI
Margarethe M. Maciulis, MD is an endocrinology, diabetes & metabolism physician with a practice address in Bay City, Michigan, and NPI 1689650103, issued on Dec 16, 2005. Check the license (Michigan 4301056636, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Margarethe M. Maciulis
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 4301056636 MI
Self-reported in NPPES; status is on the state search - Practice location
- 200 S Wenona St, Bay City, MI 48706
- Phone
- (989) 894-6040
- Enumerated
- Dec 16, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (989) 892-3983
- Medicaid ID
- 2665811 MI
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 270 in Michigan → Look up another NPI →
Also registered at 200 S Wenona St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cynthia Hack, LMSW, CSWClinical Social Worker1255393153
- Robert Lee, MDSpecialist1801957915
- Sang Oh, MDObstetrics & Gynecology Physician1467468959
Verify Margarethe M. Maciulis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301056636Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
11 Medicare Part D claims, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Margarethe M. Maciulis among 270 endocrinology, diabetes & metabolism physician records in Michigan
Margarethe M. Maciulis, MD is one of 270 endocrinology, diabetes & metabolism physician 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, 93% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2007 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Michigan
There are 270 endocrinology, diabetes & metabolism physician records in Michigan.
All 270 in Michigan → Every provider in Bay City → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Lavinia Boboc, MDBay City, MI 487061760407308
- Loabat Amiri, MDMidland, MI 486401295959104
- Sujay Madduri, M.D.Midland, MI 486401962738351
- Rachel Usala, M.D.Alma, MI 488011477086510
- Amer Issa, MDSaginaw, MI 486041326302712
- Zeina Habib, M.D.Saginaw, MI 486021720297328
- Vivek Variar, M.D.Saginaw, MI 486021942430574
- Ahmad Abu Limon, MDEast Lansing, MI 488231881080406
Common questions
What is Margarethe M. Maciulis, MD's NPI number?
Margarethe M. Maciulis, MD's National Provider Identifier (NPI) is 1689650103, issued on Dec 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Margarethe M. Maciulis, MD located?
The NPPES record lists a practice address at 200 S Wenona St, Bay City, MI, 48706. Phone: (989) 894-6040. Providers update this record themselves, so call before visiting.
How can I verify Margarethe M. Maciulis, MD's license?
NPPES lists Michigan license number 4301056636, 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 Margarethe M. Maciulis, MD prescribe under Medicare Part D?
In 2024, Margarethe M. Maciulis, MD had 11 Medicare Part D claims; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.