Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron M.K. Butler, M.D.

Orthopaedic Surgery Physician in Tomah, WI · enumerated 2006.

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

National Provider Identifier

1962450775

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Registry record

Entity type Individual (Type 1)

Name Aaron M.K. Butler

Credential M.D.

Sex Male

Practice address 1330 N Superior Ave, Tomah, WI, 54660

Phone (608) 372-4111

Enumeration date May 4, 2006

Last updated in NPPES Feb 1, 2017

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 100241 (MN) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 45054 (WI) 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
097704700	Medicaid	MN	-

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 NPI 1962450775 active?

Yes, as of the latest NPPES snapshot, NPI 1962450775 is active (record last updated 2017-02-01).

How do I verify Aaron Butler's NPI record?

Cross-check NPI 1962450775 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Glenna Olson Medical Physician Assistant · Tomah, WI NPI 1588668024 Mark Steging Surgical Physician Assistant · Tomah, WI NPI 1477558831 Jill Mcmullen Family Medicine Physician · Tomah, WI NPI 1740285998 Rick Erdman Internal Medicine Physician · Tomah, WI NPI 1952306011 Nancy Heerens-Knudson Medical Physician Assistant · Tomah, WI NPI 1932104478 Ralph Knudson Family Medicine Physician · Tomah, WI NPI 1205832557 Joan Kortbein Registered Dietitian · Tomah, WI NPI 1245236538 Kelly Hodgson-Kline Pediatrics Physician · Tomah, WI NPI 1508862699

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-01.