Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Charles P Hammer, DDS

Dentist in Ottumwa, IA · enumerated 2006 · practices at Hammer and Brechon DDS PC.

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

National Provider Identifier

1922181585

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles P Hammer

Credential DDS

Sex Male

Practice address 1302 N Elm St, Ottumwa, IA, 52501

Phone (641) 684-8636

Fax (641) 684-0686

Enumeration date Oct 24, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

122300000X Dentist Dental Providers · License 7799 (IA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
52241	Other	IA	BLUE CROSS BLUE SHIELD

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

Where does Charles Hammer practice?

The practice location on file with NPPES is in Ottumwa, IA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Charles Hammer?

The National Provider Identifier (NPI) for Charles Hammer is 1922181585, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Hammer and Brechon DDS PC Dentist · Ottumwa, IA NPI 1124101787

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.