Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Timothy M Johnson, MD

MOHS-Micrographic Surgery Physician in Ann Arbor, MI · enumerated 2006 · practices at Laura K Ganger, M.D. P.C..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1255428025

Verified

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Registry record

Entity type Individual (Type 1)

Name Timothy M Johnson

Credential MD

Sex Male

Practice address 1979 Huron Pkwy, Ann Arbor, MI, 48104

Phone (734) 344-4567

Fax (734) 669-1104

Enumeration date Oct 5, 2006

Last updated in NPPES Oct 12, 2020

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 4301053410 (MI) Secondary

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License 4301053410 (MI) Secondary

207ND0101X MOHS-Micrographic Surgery Physician Allopathic & Osteopathic Physicians · License 4301053410 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1927590	Medicaid	MI	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1255428025 active?

Yes, as of the latest NPPES snapshot, NPI 1255428025 is active (record last updated 2020-10-12).

How do I verify Timothy Johnson's NPI record?

Cross-check NPI 1255428025 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Laura Ganger Dermatology Physician · Ann Arbor, MI NPI 1568671535 Thy Thy Do Dermatology Physician · Ann Arbor, MI NPI 1184887606 Laura K Ganger, M.D. P.C. Dermatology Physician · Ann Arbor, MI NPI 1720347248 Julie Natoli Physician Assistant · Ann Arbor, MI NPI 1932512688 Miriam Sagher Family Nurse Practitioner · Ann Arbor, MI NPI 1831610153 Nicoletta Ciraulo Dermatology Physician · Ann Arbor, MI NPI 1326674441

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-12.