Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew John Nielsen, M.D.

Surgery Physician in Bemidji, MN · enumerated 2010.

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

National Provider Identifier

1235442575

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Matthew John Nielsen

Credential M.D.

Sex Male

Practice address 1300 Anne St Nw, Bemidji, MN, 56601

Phone (218) 333-5000

Fax (218) 333-5360

Enumeration date Jul 15, 2010

Last updated in NPPES Mar 25, 2022

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License RL 11620 (ND) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 59768 (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

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.

What specialty is Matthew Nielsen?

Matthew Nielsen is registered in NPPES with the primary taxonomy of Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-25.