Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Allen St. John, M.D.

Cardiovascular Disease Physician in Hot Springs, AR · enumerated 2005 · practices at National Park Cardiology Services, LLC.

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

National Provider Identifier

1124023056

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Allen St. John

Credential M.D.

Sex Male

Practice address 130 Medical Park Pl, Hot Springs, AR, 71901

Phone (501) 625-3400

Fax (501) 625-3402

Enumeration date Jun 16, 2005

Last updated in NPPES Jan 27, 2015

Taxonomy & licenses

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License C-7977 (AR) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License C-7977 (AR) 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
5J344	Other	AR	BCBS OF AR
060025716	Other	AR	RAILROAD MEDICARE
124898001	Medicaid	AR	-

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 specialty is Gregory St. John?

Gregory St. John 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.

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.

Other providers at this practice address

Browse all →

Martin Koehn Family Medicine Physician · Hot Springs, AR NPI 1548249196 Karol Palczynski Family Medicine Physician · Hot Springs, AR NPI 1174552210 Daniel Mccoy Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Hot Springs, AR NPI 1174558001 Tasha Binns Acute Care Nurse Practitioner · Hot Springs, AR NPI 1942452883 National Park Cardiology Services, LLC Cardiovascular Disease Physician · Hot Springs, AR NPI 1154556025

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-27.