Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Nicholas Onaca, M.D.

Transplant Surgery Physician in Fort Worth, TX · enumerated 2006.

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

National Provider Identifier

1043267941

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Registry record

Entity type Individual (Type 1)

Name Dr. Nicholas Onaca

Credential M.D.

Sex Male

Practice address 1400 8th Ave, Transplant, Fort Worth, TX, 76104

Phone (817) 922-4650

Fax (817) 922-4655

Enumeration date May 27, 2006

Last updated in NPPES Oct 21, 2014

Taxonomy & licenses

204F00000X Transplant Surgery Physician Allopathic & Osteopathic Physicians · License L8869 (TX) 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
182476502	Medicaid	TX	-
182476501	Medicaid	TX	-
8V8580	Other	TX	BCBS

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 Nicholas Onaca?

Nicholas Onaca is registered in NPPES with the primary taxonomy of Transplant Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-10-21.