Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William R. Felten, MD

Interventional Cardiology Physician in Midland, MI · enumerated 2006.

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

National Provider Identifier

1235119702

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Registry record

Entity type Individual (Type 1)

Name Dr. William R. Felten

Credential MD

Sex Male

Practice address 301 W Wackerly St, Midland, MI, 48640

Phone (989) 832-0900

Enumeration date Jan 19, 2006

Last updated in NPPES May 3, 2012

Taxonomy & licenses

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 4301062964 (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
4526512	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 William Felten?

The National Provider Identifier (NPI) for William Felten is 1235119702, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Felten practice?

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

Other providers at this practice address

Browse all →

Waleed Doghmi Cardiovascular Disease Physician · Midland, MI NPI 1023010204 Robert Genovese Cardiovascular Disease Physician · Midland, MI NPI 1427038900 Susan Sallach Cardiovascular Disease Physician · Midland, MI NPI 1659338630 Michael Lauer Interventional Cardiology Physician · Midland, MI NPI 1407890536 Kenneth Vansumeren Physician Assistant · Midland, MI NPI 1750399986 Andrzej Boguszewski Interventional Cardiology Physician · Midland, MI NPI 1063580595 Loabat Amiri Endocrinology, Diabetes & Metabolism Physician · Midland, MI NPI 1295959104 Ashley Dailey Adult Health Nurse Practitioner · Midland, MI NPI 1790936128

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-05-03.