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JAMES CALVIN NIEWENHUIS M.D.
NPI 1356367924
Pathology - Anatomic Pathology & Clinical Pathology in Grand Haven, MI

Active since July 15, 2006PECOS Enrolled
83.88/100
CMS Quality Rating
1309 SHELDON RD, GRAND HAVEN, MI 49417(616) 847-5257(419) 866-5453 Get Directions Write a Review

NPPES record last updated: June 16, 2014. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About James Calvin Niewenhuis M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JAMES CALVIN NIEWENHUIS M.D. (NPI 1356367924) is an individual anatomic pathology & clinical pathology provider in Grand Haven, Michigan, licensed in Michigan (4301055088) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356367924
Entity TypeIndividualMale
Primary Taxonomy207ZP0102X
Provider Legal NameJAMES CALVIN NIEWENHUISCredential: M.D.
Location Address1309 SHELDON RDGrand Haven, MI 49417-2404
Mailing Address5700 Southwyck BlvdToledo, OH 43614-1509 · (800) 288-8325 · Fax (419) 866-5453
Phone(616) 847-5257
Fax(419) 866-5453
Sole ProprietorNo
Enumeration DateJuly 15, 2006
Last NPPES UpdateJune 16, 2014
✔ NPI 1356367924 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in MI · 4301055088
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
1309 SHELDON RD, Grand Haven, MI 49417
Open in Google Maps ↗

Other Identifiers 9

Other220A360250MI · Bcbsm
Medicare UPINF86665MI
Medicare ID-Type Unspecified0A36025008MI · Medicare
Other220B376060MI · Bcbsm
Medicare ID-Type Unspecified0A36018007MI · Medicare
Medicaid4197568MI
Other220A360180MI · Bcbsm
Medicare ID-Type Unspecified0B37606005MI · Medicare
Medicare ID-Type Unspecified0M17120005MI · Medicare

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

James Calvin Niewenhuis M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show James Niewenhuis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Michigan Pathology Specialists PC
29 mi
Anatomic Pathology & Clinical Pathology
35 MICHIGAN ST NE
Grand Rapids, MI 49503
  • Reassigned Medicare billing, Michigan enrollment
  • 39 clinicians in this Medicare group
NPI 1033193875 (616) 267-2660
Patholgy Services Of Kalamazoo, PC
62 mi
Anatomic Pathology & Clinical Pathology
601 JOHN ST
Kalamazoo, MI 49007
  • Reassigned Medicare billing, Michigan enrollment
  • 20 clinicians in this Medicare group
NPI 1548243595 (269) 341-7654

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
266 services137 patients
Pathology examination of tissue using a microscope, moderately high complexity 88307
A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.
44 services22 patients
Pathology examination of tissue using a microscope, moderately low complexity 88304
A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49417 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.15 typical visit price
range $54.34 – $166.68
Typical copayment $31.53 (range $13.58 – $41.67)
Most-billed visit code 99204
Established Patient
$96.44 typical visit price
range $17.09 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

83.88/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality86.28
Improvement Activities40
Cost67.44

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JASON ALLAN MAY PA
Physician Assistant
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 842-3600
KAYTLIN JESSICA SCHWEDA LMSW
Social Worker (Clinical)
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 847-5330
MUHAMMAD AZAM MD
Pathology (Anatomic Pathology & Clinical Pathology)
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 847-5200
CANDENCE A DIEFENDORF RD
Dietitian, Registered (Nutrition, Renal)
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 847-5547
JENNIFER SUE MATUZESKI LMSW
Social Worker (Clinical)
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 847-5330
BRIAN TOPPEN RPH
Pharmacist
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 847-5227
NORTH OTTAWA COMMUNITY HOSPITAL
General Acute Care Hospital
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 842-3600
BENJAMIN ESH-NAUTA LMSW
Social Worker (Clinical)
1309 SHELDON RD
GRAND HAVEN, MI 49417
Ottawa County (616) 842-3600

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is James Niewenhuis's NPI number?

The NPI number for James Niewenhuis is 1356367924. It was assigned to this individual provider in the NPPES registry on July 15, 2006.

Where is James Niewenhuis located?

James Niewenhuis practices at 1309 Sheldon Rd, Grand Haven, MI 49417. The listed phone number is (616) 847-5257.

What is James Niewenhuis's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is James Niewenhuis enrolled in Medicare?

Yes. James Niewenhuis is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for James Niewenhuis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Niewenhuis reassigns Medicare benefits to 2 organizations: Michigan Pathology Specialists PC (Grand Rapids, MI) and Patholgy Services Of Kalamazoo, PC (Kalamazoo, MI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for James Niewenhuis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for James Niewenhuis was last updated on June 16, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.