Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Joseph Klontz, MD

Psychiatry Physician in Joplin, MO · enumerated 2005 · practices at Grand Falls Center for Recovery LLC.

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

National Provider Identifier

1922001635

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Registry record

Entity type Individual (Type 1)

Name Dr. William Joseph Klontz

Credential MD

Sex Male

Practice address 5615 W 32nd St, Joplin, MO, 64804

Phone (417) 627-8400

Fax (417) 623-1787

Enumeration date May 27, 2005

Last updated in NPPES Mar 13, 2015

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License R4D32 (MO) 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
201882701	Medicaid	MO	-
100081340F	Medicaid	KS	-
100197560A	Medicaid	OK	-

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

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.

What specialty is William Klontz?

William Klontz is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Novella Keyler Clinical Social Worker · Joplin, MO NPI 1750444063 Patrick Stangeby Psychiatry Physician · Joplin, MO NPI 1083834873 Tammy Axtell Clinical Social Worker · Joplin, MO NPI 1326365891 Amber Penn Social Worker · Joplin, MO NPI 1811217193 Tina Nelson Social Worker · Joplin, MO NPI 1962851709 Grand Falls Center for Recovery LLC Substance Abuse Rehabilitation Facility · Joplin, MO NPI 1396460788 Katey Fallis Addiction (Substance Use Disorder) Counselor · Joplin, MO NPI 1932959327 Courtney Rice Social Worker · Joplin, MO NPI 1538911151

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-03-13.