Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Christian Umhau, MD

Addiction Medicine (Family Medicine) Physician in Whiteriver, AZ · enumerated 2009 · practices at Whiteriver Service Unit - Ihs.

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

National Provider Identifier

1316276140

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Registry record

Entity type Individual (Type 1)

Name Dr. John Christian Umhau

Credential MD

Sex Male

Practice address 200 West Hospital Dr, Whiteriver, AZ, 85941

Phone (928) 338-3555

Fax (928) 338-5508

Enumeration date Dec 7, 2009

Last updated in NPPES Feb 7, 2014

Taxonomy & licenses

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License D28090 (MD) Primary

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
HSZ962RBU	Other	-	WHITERIVER
846790	Medicaid	AZ	-
020561	Medicaid	AZ	-

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 specialty is John Umhau?

John Umhau is registered in NPPES with the primary taxonomy of Addiction Medicine (Family Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-02-07.