NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Adam Joseph Gratz, D.O.

General Practice Physician in Hawi, HI · enumerated 2007.

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

National Provider Identifier

1598895351

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Registry record

Entity type Individual (Type 1)
Name Dr. Adam Joseph Gratz
Credential D.O.
Sex Male
Practice address Hawi, HI, 96719
Phone (808) 960-3311
Fax (866) 263-1889
Enumeration date Mar 7, 2007
Last updated in NPPES Mar 7, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License DOS-1090 (HI) 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
E07702 Other HI CERTIFICATE OF REGISTRATION FOR CONTROLLED SUBSTANCES

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 Adam Gratz practice?
The practice location on file with NPPES is in Hawi, HI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Adam Gratz?
The National Provider Identifier (NPI) for Adam Gratz is 1598895351, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.