NPPES file of Aug 9, 2026

James Calvin Niewenhuis, M.D.

Anatomic Pathology & Clinical Pathology Physician · Grand Haven, MI

James Calvin Niewenhuis, M.D. is an anatomic pathology & clinical pathology physician with a practice address in Grand Haven, Michigan, and NPI 1356367924, issued on Jul 15, 2006. Check the license (Michigan 4301055088, 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 · Medicare files 2023 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1356367924
Name
James Calvin Niewenhuis
Credential
M.D.
Primary taxonomy
Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
License number
4301055088 MI
Self-reported in NPPES; status is on the state search
Practice location
1309 Sheldon RD, Grand Haven, MI 49417
Phone
(616) 847-5257
Enumerated
Jul 15, 2006
Record last updated
Jun 16, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(419) 866-5453
Medicaid ID
4197568 MI
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 1309 Sheldon RD

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

  1. Muhammad Azam, MDAnatomic Pathology & Clinical Pathology Physician1043204696
  2. Carrie Brondyke, LMSWSocial Worker1730593831
  3. Laura BuitenhuisClinical Social Worker1720484538
  4. Mary Cole, RDRegistered Dietitian1881657351
  5. Mary Cunningham, R.D., CDERegistered Dietitian1801055827
  6. Lee Demeester, MDAnatomic Pathology & Clinical Pathology Physician1821017724

Verify James Calvin Niewenhuis 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 4301055088    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

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The practice group's MIPS final score for 2023 (Medicare payment program): 83.9 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score86.3
  2. Costout of 100 · 30%67.4
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Anatomic Pathology & Clinical Pathology Physician providers in Michigan

There are 561 anatomic pathology & clinical pathology physician records in Michigan.

All 561 in Michigan → Every provider in Grand Haven →

Other anatomic pathology & clinical pathology physician records in Michigan

  1. Kay Aardema, MDGrand Rapids, MI1407840051
  2. Omar Abbas, MDDetroit, MI1417687450
  3. Nour Abd AlmohsenDetroit, MI1104359983
  4. Michael Abrash, M.D.Farmington Hills, MI1033152681
  5. Monroe Adams, DOMount Clemens, MI1437103769
  6. Aamir Ahsan, MDGrand Blanc, MI1386832640
  7. Beena Ahsan, M.DDetroit, MI1841653250
  8. Stephanie Akins, M.D.Rochester, MI1457670135
  9. Mousa Al-Abbadi, MDDetroit, MI1023056124
  10. Basim Al-Khafaji, MDDetroit, MI1386758571

Common questions

What is James Calvin Niewenhuis, M.D.'s NPI number?

James Calvin Niewenhuis, M.D.'s National Provider Identifier (NPI) is 1356367924, issued on Jul 15, 2006. An NPI identifies a provider in billing; it is not a license.

Where is James Calvin Niewenhuis, M.D. located?

The NPPES record lists a practice address at 1309 Sheldon RD, Grand Haven, MI, 49417. Phone: (616) 847-5257. Providers update this record themselves, so call before visiting.

How can I verify James Calvin Niewenhuis, M.D.'s license?

NPPES lists Michigan license number 4301055088, 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.

What is James Calvin Niewenhuis, M.D.'s MIPS final score?

The 2023 MIPS final score is 83.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.