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John Edward Hartweger, MD

Internal Medicine Physician in Saint Peters, MO · enumerated 2005.

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

National Provider Identifier

1366443756

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Registry record

Entity type Individual (Type 1)
Name John Edward Hartweger
Credential MD
Sex Male
Practice address 10 Hospital Dr, Saint Peters, MO, 63376
Phone (314) 317-0600
Fax (314) 317-0606
Enumeration date Aug 9, 2005
Last updated in NPPES May 8, 2014

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 2001032147 (MO) Primary
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 2001032147 (MO) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 2001032147 (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
1366443756 Medicaid IL -
208450809 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

What is the NPI number for John Hartweger?
The National Provider Identifier (NPI) for John Hartweger is 1366443756, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Hartweger practice?
The practice location on file with NPPES is in Saint Peters, MO. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-08.