Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

James H Petersen, M.D.

Gastroenterology Physician in Lake St Louis, MO · enumerated 2006.

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

National Provider Identifier

1831169275

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Registry record

Entity type Individual (Type 1)

Name James H Petersen

Credential M.D.

Sex Male

Practice address 200 Brevco Plz, Suite 208, Lake St Louis, MO, 63367

Phone (636) 561-9020

Enumeration date Jan 26, 2006

Last updated in NPPES Jul 18, 2014

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License MOR7B69 (MO) 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
1831169275	Medicaid	MO	-
P01021819	Other	MO	RAILROAD MEDICARE
24528	Other	MO	BC/BS MISSOURI
202263828	Medicaid	MO	-

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 James Petersen?

James Petersen is registered in NPPES with the primary taxonomy of Gastroenterology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Michael Zerega Gastroenterology Physician · Lake St Louis, MO NPI 1073505178 Digestive Disease Medical Consultants, PC Gastroenterology Physician · Lake St Louis, MO NPI 1407960107 Total Renal Care Inc End-Stage Renal Disease (ESRD) Treatment Clinic/Center · Lake Saint Louis, MO NPI 1396074597

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-07-18.