Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Yvona M. Trnka, MD

Q: What is the NPI number for Yvona Trnka?

The National Provider Identifier (NPI) for Yvona Trnka is 1427143957, a Type 1 (individual) record in the CMS NPPES registry.

Gastroenterology Physician in Boston, MA · enumerated 2006.

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

National Provider Identifier

1427143957

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Registry record

Entity type Individual (Type 1)

Name Yvona M. Trnka

Credential MD

Sex Female

Practice address 133 Brookline Avenue, Boston, MA, 02215

Phone (617) 421-1380

Fax (617) 421-1303

Enumeration date Oct 3, 2006

Last updated in NPPES Jun 3, 2011

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 40734 (MA) 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
0003082	Other	MA	NEIGHBORHOOD HEALTH PLAN
3179605	Medicaid	MA	-
M167	Other	MA	HARVARD PILGRIM
729764	Other	MA	TUFTS HEALTH PLAN
E05238	Other	MA	BLUE CROSS
P00074246	Other	MA	MEDICARE RAILROAD
3227393-002	Other	MA	CIGNA

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 Yvona Trnka practice?

The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Yvona Trnka?

The National Provider Identifier (NPI) for Yvona Trnka is 1427143957, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-03.