Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David M Butler, MD

Internal Medicine Physician in Casper, WY · enumerated 2006.

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

National Provider Identifier

1699861518

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Registry record

Entity type Individual (Type 1)

Name David M Butler

Credential MD

Sex Male

Practice address 1233 E 2nd St, Casper, WY, 82601

Phone (800) 822-7201

Fax (888) 464-8483

Enumeration date Oct 5, 2006

Last updated in NPPES Sep 30, 2019

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License ME139309 (FL) Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License ME139309 (FL) Secondary

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 01082890A (IN) Secondary

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License ME139309 (FL) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A90360 (CA) 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.

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Frequently asked questions

What specialty is David Butler?

David Butler 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 2019-09-30.