NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Paul Greving, DO

Internal Medicine Physician in Hannibal, MO · enumerated 2006 · practices at Hannibal Regional Healthcare System, Inc.

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

National Provider Identifier

1043388036

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. John Paul Greving
Credential DO
Sex Male
Practice address 6500 Hospital Dr, Hannibal, MO, 63401
Phone (573) 629-3400
Fax (573) 629-3414
Enumeration date Nov 30, 2006
Last updated in NPPES Oct 7, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 2006005512 (MO) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
204917702 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for John Greving?
The National Provider Identifier (NPI) for John Greving is 1043388036, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Greving practice?
The practice location on file with NPPES is in Hannibal, MO. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-07.