THOMAS EUGENE HARTWIG M.D.
NPI 1982865382
Psychiatry & Neurology - Psychiatry in Ann Arbor, MI

Q: What is Thomas Hartwig's NPI number?

The NPI number for Thomas Hartwig is 1982865382. It was assigned to this individual provider in the NPPES registry on June 19, 2008.

Q: What is Thomas Hartwig's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Thomas Hartwig was last updated on January 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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 19, 2008PECOS Enrolled

1500 E MEDICAL CENTER DR, MCHC, F6135, ANN ARBOR, MI 48109(734) 615-0199 Get Directions Write a Review

NPPES record last updated: January 26, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Jan 26, 2026, Dec 21, 2020 (2 updates tracked since 2020).

On this page

About Thomas Eugene Hartwig M.d. NPPES

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

THOMAS EUGENE HARTWIG M.D. (NPI 1982865382) is an individual psychiatry provider in Ann Arbor, Michigan, licensed in Michigan (4301092465) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1982865382

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameTHOMAS EUGENE HARTWIGCredential: M.D.

Location Address1500 E MEDICAL CENTER DR, MCHC, F6135Ann Arbor, MI 48109-5000

Mailing Address24114 Eton AveDearborn Heights, MI 48125-1918 · (313) 617-6557

Phone(734) 615-0199

Sole ProprietorNo

Enumeration DateJune 19, 2008

Last NPPES UpdateJanuary 26, 20262 updates tracked since enumeration

NPPES CertifiedJanuary 26, 2026

✔ NPI 1982865382 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in MI · 4301092465

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.

1500 E MEDICAL CENTER DR, Ann Arbor, MI 48109

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Secondary Practice Locations 2

Location 1400 Hobart StCadillac, MI 49601-2331 · Phone (231) 935-6380

Location 21105 Sixth StTraverse City, MI 49684-2345 · Phone (231) 935-6380

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Priority Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Thomas Eugene Hartwig 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

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

Munson Healthcare Cadillac

151 mi

Rural Health

100 N ROLAND ST
Mc Bain, MI 49657

Reassigned Medicare billing, Michigan enrollment
156 clinicians in this Medicare group

NPI 1336539063 (231) 825-8101

Munson Medical Center

193 mi

Gynecologic Oncology

1105 SIXTH ST
Traverse City, MI 49684

Reassigned Medicare billing, Michigan enrollment
Also billed through NPI 1386672665 (Michigan)
492 clinicians in this Medicare group

NPI 1013222587 (231) 935-5000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48109 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

$177.36 typical visit price

range $58.04 – $177.36

Typical copayment $44.34 (range $14.51 – $44.34)

Most-billed visit code 99205

Established Patient

$72.38 typical visit price

range $18.32 – $143.49

Typical copayment $18.09 (range $4.58 – $35.87)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

LOKMAN SUNG MD

Pathology (Forensic Pathology)

1500 E MEDICAL CENTER DR, 2ND FLOOR UNIVERSITY HOSPITAL RECP PATHOLOGY
ANN ARBOR, MI 48109

Washtenaw County (800) 862-7284

SAMEER DEV SAINI M.D.

Internal Medicine (Gastroenterology)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

KYLE DAVID PERRY MD

Pathology (Cytopathology)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

DR. DAVID ALEXANDER STEWART M.D.

Pediatrics

1500 E MEDICAL CENTER DR, 12TH FLOOR C.S. MOTT CHILDREN'S HOSPITAL ROOM 525
ANN ARBOR, MI 48109

Washtenaw County (734) 763-5302

DR. MICHAEL EDMUND WATSON MD

Pediatrics (Pediatric Infectious Diseases)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

CARRIE KRAEGER PORTER PA-C

Physician Assistant

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-6666

DENISE LYNN BERRY CRNA

Nurse Anesthetist, Certified Registered

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

KETTI SOPHIA PETERSEN MD

Family Medicine (Hospice and Palliative Medicine)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

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 Thomas Hartwig's NPI number?

The NPI number for Thomas Hartwig is 1982865382. It was assigned to this individual provider in the NPPES registry on June 19, 2008.

Where is Thomas Hartwig located?

Thomas Hartwig practices at 1500 E Medical Center Dr Mchc, F6135, Ann Arbor, MI 48109. The listed phone number is (734) 615-0199.

What is Thomas Hartwig's specialty?

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

Is Thomas Hartwig enrolled in Medicare?

Yes. Thomas Hartwig is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Thomas Hartwig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Hartwig reassigns Medicare benefits to 2 organizations: Munson Healthcare Cadillac (Mc Bain, MI) and Munson Medical Center (Traverse City, 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 Thomas Hartwig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Hartwig accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Thomas Hartwig 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 Thomas Hartwig was last updated on January 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.