JOHN GRABOWSKI, M.D., P.L.L.C.
NPI 1487378113
Psychiatry & Neurology - Psychiatry in Warren, MI

Q: What is John Grabowski, M.D., P.L.L.C.'s NPI number?

The NPI number for John Grabowski, M.D., P.L.L.C. is 1487378113. It was assigned to this organization in the NPPES registry on September 27, 2022.

Q: What is John Grabowski, M.D., P.L.L.C.'s specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Active since September 27, 2022

27550 SCHOENHERR, SUITE 300, WARREN, MI 48088(586) 582-7979(586) 582-7981 Get Directions Write a Review

NPPES record last updated: September 27, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About John Grabowski, M.d., P.l.l.c. NPPES

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

JOHN GRABOWSKI, M.D., P.L.L.C. (NPI 1487378113) is a healthcare organization registered as a psychiatry in Warren, Michigan and active in the NPI registry since September 2022. The organization lists John Grabowski, Physician, as its authorized official.

NPPES Registry Identity

NPI1487378113

Entity TypeOrganization

Primary Taxonomy2084P0800X

Legal Business NameJOHN GRABOWSKI, M.D., P.L.L.C.

Location Address27550 SCHOENHERR, SUITE 300Warren, MI 48088

Mailing AddressP.o. Box 361038Grosse Pointe Farms, MI 48236 · (586) 775-0357 · Fax (586) 775-0357

Phone(586) 582-7979

Fax(586) 582-7981

Organization SubpartNo

Authorized OfficialJohn GrabowskiPhysician · (586) 582-7979

Enumeration DateSeptember 27, 2022

NPPES CertifiedSeptember 27, 2022

✔ NPI 1487378113 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

27550 SCHOENHERR, Warren, MI 48088

Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John Grabowski, M.d., P.l.l.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to John Grabowski, M.D., P.L.L.C., which bills Medicare for the services this clinician delivers.

Clinician (1)

John Grabowski, M.D

Psychiatry

NPI 1477517191

4646 JOHN R ST
Detroit, MI 48201

(313) 576-4906

✔ PECOS✔ Accepts Medicare3.9 mi

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

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 John Grabowski, M.D., P.L.L.C.'s NPI number?

The NPI number for John Grabowski, M.D., P.L.L.C. is 1487378113. It was assigned to this organization in the NPPES registry on September 27, 2022.

Where is John Grabowski, M.D., P.L.L.C. located?

John Grabowski, M.D., P.L.L.C. is located at 27550 Schoenherr Suite 300, Warren, MI 48088. The listed phone number is (586) 582-7979.

What is John Grabowski, M.D., P.L.L.C.'s specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is John Grabowski, M.D., P.L.L.C. enrolled in Medicare?

Yes. John Grabowski, M.D., P.L.L.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through John Grabowski, M.D., P.L.L.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Psychiatry) reassigns their Medicare billing to John Grabowski, M.D., P.L.L.C.. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does John Grabowski, M.D., P.L.L.C. accept?

Health plans from Blue Care Network of Michigan list John Grabowski, M.D., P.L.L.C. as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for John Grabowski, M.D., P.L.L.C. was last updated on September 27, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.