Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Clay F Hallberg, DO

Family Medicine Physician in Oelwein, IA · enumerated 2006.

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

National Provider Identifier

1811975691

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Clay F Hallberg

Credential DO

Sex Male

Practice address 204 8th Ave Se, Oelwein, IA, 50662

Phone (319) 283-2651

Fax (319) 283-1430

Enumeration date Jan 3, 2006

Last updated in NPPES Oct 22, 2007

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 02321 (IA) 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
1059535	Medicaid	IA	-

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

Is NPI 1811975691 active?

Yes, as of the latest NPPES snapshot, NPI 1811975691 is active (record last updated 2007-10-22).

How do I verify Clay Hallberg's NPI record?

Cross-check NPI 1811975691 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-22.