Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARTIN P. GREYDANUS M.D.
NPI 1043215544
Specialist in Grand Rapids, MI

Q: What is Martin Greydanus's NPI number?

The NPI number for Martin Greydanus is 1043215544. It was assigned to this individual provider in the NPPES registry on June 20, 2005.

Q: What is Martin Greydanus's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for Martin Greydanus was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.

Active since June 20, 2005PECOS Enrolled

310 LAFAYETTE AVE SE, STE 400, GRAND RAPIDS, MI 49503(616) 752-6525(616) 752-6556 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Martin P. Greydanus M.d. NPPES

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

DR. MARTIN P. GREYDANUS M.D. (NPI 1043215544) is an individual specialist in Grand Rapids, Michigan, licensed in Michigan (4301048500) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1043215544

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. MARTIN P. GREYDANUSCredential: M.D.

Location Address310 LAFAYETTE AVE SE, STE 400Grand Rapids, MI 49503-4693

Mailing Address310 Lafayette Ave Se, Ste 400Grand Rapids, MI 49503-4693 · (616) 752-6525 · Fax (616) 752-6556

Phone(616) 752-6525

Fax(616) 752-6556

Sole ProprietorNo

Enumeration DateJune 20, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1043215544 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in MI · 4301048500

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

310 LAFAYETTE AVE SE, Grand Rapids, MI 49503

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Other Identifiers 1

Medicaid2701613MI

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Martin P. Greydanus 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.

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.

PAUL D HARRIS DO

Internal Medicine (Pulmonary Disease)

310 LAFAYETTE AVE SE, STE 415
GRAND RAPIDS, MI 49503

Kent County (616) 685-5666

GRAND RIVER ENDOSCOPY CENTER, L.L.C.

Clinic/Center (Ambulatory Surgical)

310 LAFAYETTE AVE SE, SUITE 200
GRAND RAPIDS, MI 49503

Kent County (616) 752-5890

ORENA J KIRCHNER FNP

Nurse Practitioner (Family)

310 LAFAYETTE AVE SE, SUITE 400
GRAND RAPIDS, MI 49503

Kent County (616) 752-6525

CHRISTOPHER JOHN MURPHY MD

Internal Medicine (Gastroenterology)

310 LAFAYETTE AVE SE
GRAND RAPIDS, MI 49503

Kent County (216) 536-1528

LUCY LEDESMA NP

Nurse Practitioner (Adult Health)

310 LAFAYETTE AVE SE, STE 410
GRAND RAPIDS, MI 49503

Kent County (616) 685-8200

DR. LENNOX HUGH FORREST PH.D.

Psychologist (Counseling)

310 LAFAYETTE AVE SE, SUITE 325
GRAND RAPIDS, MI 49503

Kent County (616) 249-8486

GRAND RIVER GASTROENTEROLOGY PC

Internal Medicine (Gastroenterology)

310 LAFAYETTE AVE SE, SUITE 400
GRAND RAPIDS, MI 49503

Kent County (616) 752-6525

JENNIFER J LACKMAN PA

Physician Assistant

310 LAFAYETTE AVE SE
GRAND RAPIDS, MI 49503

Kent County (616) 685-8200

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 Martin Greydanus's NPI number?

The NPI number for Martin Greydanus is 1043215544. It was assigned to this individual provider in the NPPES registry on June 20, 2005.

Where is Martin Greydanus located?

Martin Greydanus practices at 310 Lafayette Ave SE Ste 400, Grand Rapids, MI 49503. The listed phone number is (616) 752-6525.

What is Martin Greydanus's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Martin Greydanus enrolled in Medicare?

Yes. Martin Greydanus is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Martin Greydanus was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.