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

Margaret A Butler, MD

Surgery Physician in Tempe, AZ · enumerated 2006.

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

National Provider Identifier

1841279270

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Registry record

Entity type Individual (Type 1)

Name Margaret A Butler

Credential MD

Sex Female

Practice address Tempe, AZ, 85282

Phone (480) 820-1919

Fax (480) 304-9047

Enumeration date Jan 13, 2006

Last updated in NPPES May 15, 2013

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

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 22499 (AZ) 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
170217	Medicaid	AZ	-

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 is the NPI number for Margaret Butler?

The National Provider Identifier (NPI) for Margaret Butler is 1841279270, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Butler practice?

The practice location on file with NPPES is in Tempe, AZ. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-15.