Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Steven B.H. Timmis, M.D.

Interventional Cardiology Physician in Southfield, MI · enumerated 2006 · practices at Southfield Internists PC.

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

National Provider Identifier

1235189762

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Registry record

Entity type Individual (Type 1)

Name Dr. Steven B.H. Timmis

Credential M.D.

Sex Male

Practice address 16800 W 12 Mile Rd, Suite 102, Southfield, MI, 48076

Phone (248) 569-9797

Fax (248) 569-9780

Enumeration date May 12, 2006

Last updated in NPPES Nov 7, 2024

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 4301057715 (MI) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 4301057715 (MI) Secondary

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 4301057715 (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
4133551	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Steven Timmis?

The National Provider Identifier (NPI) for Steven Timmis is 1235189762, a Type 1 (individual) record in the CMS NPPES registry.

Where does Steven Timmis practice?

The practice location on file with NPPES is in Southfield, MI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Pratibha Modi Internal Medicine Physician · Southfield, MI NPI 1184614349 Peter Lipson Internal Medicine Physician · Southfield, MI NPI 1396729737 Southfield Internists PC Internal Medicine Physician · Southfield, MI NPI 1760573075 Amy Parker Pediatric Dentistry · Southfield, MI NPI 1639214935 Monica Lewis General Practice Dentistry · Southfield, MI NPI 1558495341 Gerard Housey Clinical Pathology/Laboratory Medicine Physician · Southfield, MI NPI 1093086951 Maegan Daughtery Pediatric Dentistry · Southfield, MI NPI 1942628250

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-07.