Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert W. Neilson, M.D.

Internal Medicine Physician in Winona, MN · enumerated 2005.

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

National Provider Identifier

1952390338

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Registry record

Entity type Individual (Type 1)

Name Robert W. Neilson

Credential M.D.

Sex Male

Practice address 855 Mankato Ave, Winona, MN, 55987

Phone (507) 454-3650

Fax (507) 474-3392

Enumeration date Oct 18, 2005

Last updated in NPPES Feb 29, 2012

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License L4594 (TX) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 52693 (MN) 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
78718	Other	NM	PRESBYTERIAN COMMERCIAL
86723Z	Other	TX	HMO BLUE
151183401	Medicaid	TX	-
77871367	Medicaid	NM	-
100159800A	Medicaid	OK	-
131010101	Other	TX	FIRSTCARE COMMERCIAL
A535	Other	NM	TRIWEST
8B2602	Other	TX	BC/BS
78718	Medicaid	NM	-
131010100	Medicaid	TX	-

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

What specialty is Robert Neilson?

Robert Neilson is registered in NPPES with the primary taxonomy of Internal Medicine 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-29.