NPPES file of Aug 9, 2026

Brian William Nielsen, M.D.

Obstetrics & Gynecology Physician · Kalamazoo, MI

Brian William Nielsen, M.D. is an obstetrics & gynecology physician with a practice address in Kalamazoo, Michigan, and NPI 1851342349, issued on May 12, 2006. Check the license (Michigan 4301078174, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1851342349
Name
Brian William Nielsen
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License numbers
4301078174 MI
C2939 KY
21228 ND
042.0012157 VT
Self-reported in NPPES; status is on the state search
Practice location
601 John St Ste N1100, Kalamazoo, MI 49007
Phone
(269) 341-7887
Enumerated
May 12, 2006
Record last updated
Aug 14, 2024
Medicare enrollment
Enrolled (PECOS I20240913002577); accepts Medicare assignment
Medical or professional school
Wayne State University School Of Medicine, 2001
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 601 John St Ste N1100

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Emily Bunce, MDMaternal & Fetal Medicine Physician1952626061
  2. William Mundle, MD FRCSCMaternal & Fetal Medicine Physician1326648577
  3. Andrea Noud, RDRegistered Dietitian1275152688
  4. Nicole Wright, MSGenetic Counselor (M.S.)1922992338

Verify Brian William Nielsen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301078174    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Michigan license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Community Medical Associates IncLouisville, KY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Obstetrics & Gynecology Physician providers in Michigan

There are 1,776 obstetrics & gynecology physician records in Michigan.

All 1,776 in Michigan → Every provider in Kalamazoo →

Other obstetrics & gynecology physician records in Michigan

  1. Bryan Aaron, MDAnn Arbor, MI1578307724
  2. Mushtak Abbou, MDRoyal Oak, MI1093796922
  3. Youstina Abdallah, MDGrand Rapids, MI1679325062
  4. Adib Abdelrahman, D.O.Pontiac, MI1679889406
  5. Anan Abdelrahman, MDPontiac, MI1760472740
  6. Charlene Abernethy, DOWilliamsburg, MI1447305016
  7. Andrea Abessinio, D.O.Saint Clair Shores, MI1144237926
  8. Carmela Abessinio, D.O.Grosse Pointe, MI1174661763
  9. Joelle Abood, M.D.Troy, MI1063724813
  10. Margot Abundis, M.D.Roseville, MI1396746194

Common questions

What is Brian William Nielsen, M.D.'s NPI number?

Brian William Nielsen, M.D.'s National Provider Identifier (NPI) is 1851342349, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Brian William Nielsen, M.D. located?

The NPPES record lists a practice address at 601 John St Ste N1100, Kalamazoo, MI, 49007. Phone: (269) 341-7887. Providers update this record themselves, so call before visiting.

How can I verify Brian William Nielsen, M.D.'s license?

NPPES lists Michigan license number 4301078174, 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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.