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

Dr. John B Costello, M.D.

Internal Medicine Physician in Saint Louis, MO · enumerated 2006.

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

National Provider Identifier

1417062563

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Registry record

Entity type Individual (Type 1)

Name Dr. John B Costello

Credential M.D.

Sex Male

Practice address Saint Louis, MO, 63131

Phone (314) 995-9988

Fax (866) 847-8598

Enumeration date Aug 20, 2006

Last updated in NPPES Jul 15, 2013

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License R9162 (MO) Primary

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License R9162 (MO) 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
2154714	Other	-	AETNA SPECIALIST
87043	Other	-	FIRST HEALTH
5502	Other	-	BLUE CROSS BLUE SHIELD MO
112155277	Other	-	RAILROAD MEDICARE
951692	Other	-	AETNA
130260	Other	-	GHP

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 John Costello?

John Costello 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.

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