Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patrick Paul Litonjua, MD

Endocrinology, Diabetes & Metabolism Physician in Janesville, WI · enumerated 2006.

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

National Provider Identifier

1831297308

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Registry record

Entity type Individual (Type 1)

Name Patrick Paul Litonjua

Credential MD

Sex Male

Practice address 3524 E Milwaukee St, Janesville, WI, 53546

Phone (608) 756-7100

Fax (608) 756-4700

Enumeration date Sep 20, 2006

Last updated in NPPES Sep 10, 2012

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 52852-020 (WI) 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
LITONPAT	Other	WI	MERCYCARE INSURANCE
60949	Other	WI	DEAN HEALTH INSURANCE
1831297308	Medicaid	WI	-

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 Patrick Litonjua?

Patrick Litonjua is registered in NPPES with the primary taxonomy of Endocrinology, Diabetes & Metabolism 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 2012-09-10.