Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael J Butler, M.D.

Cardiovascular Disease Physician in Siloam Springs, AR · enumerated 2006.

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

National Provider Identifier

1962440701

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael J Butler

Credential M.D.

Sex Male

Practice address 603-2 N Progress Ave Ste 400, Siloam Springs Cardiology, Siloam Springs, AR, 72761

Phone (479) 215-3060

Fax (479) 549-4044

Enumeration date Jun 3, 2006

Last updated in NPPES Mar 25, 2014

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 25MA05045100 (NJ) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License E-7929 (AR) Primary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 30125 (OK) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 9701266 (NC) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 0101050127 (VA) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License MD044769E (PA) Secondary

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
60022220	Other	-	HORIZON NJ HEALTH
001007591	Other	-	AMERICHOICE
0013846	Medicaid	NJ	-
3K5951	Other	-	HEALTHNET
P00390944	Other	-	RR MEDICARE
42419	Other	-	UNIVERSITY HEALTHPLAN
1168522	Other	-	AETNA
P3722693	Other	-	OXFORD
2341853	Other	-	UNITED HEALTHCARE
955491	Other	PA	PA BLUE SHIELD

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

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 Michael Butler?

Michael Butler is registered in NPPES with the primary taxonomy of Cardiovascular Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-25.