Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Timothy Mark Rittenour, M.D.

General Practice Physician in Thief River Falls, MN · enumerated 2006.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1104881572

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Registry record

Entity type Individual (Type 1)

Name Dr. Timothy Mark Rittenour

Credential M.D.

Sex Male

Practice address Thief River Falls, MN, 56701

Phone (218) 683-5118

Fax (218) 683-5228

Enumeration date Apr 19, 2006

Last updated in NPPES Jul 21, 2022

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 33334 (MN) Primary

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

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 specialty is Timothy Rittenour?

Timothy Rittenour is registered in NPPES with the primary taxonomy of General Practice Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-07-21.