Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jack Pieniazek, DO

Family Medicine Physician in Conroe, TX · enumerated 2005.

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

National Provider Identifier

1164426870

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Registry record

Entity type Individual (Type 1)

Name Dr. Jack Pieniazek

Credential DO

Sex Male

Practice address 690 S Loop 336 W, Ste 222, Conroe, TX, 77304

Phone (936) 756-6661

Fax (936) 756-6681

Enumeration date Jun 9, 2005

Last updated in NPPES Jun 15, 2021

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License K0541 (TX) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
043624803	Medicaid	TX	-

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

What is the NPI number for Jack Pieniazek?

The National Provider Identifier (NPI) for Jack Pieniazek is 1164426870, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jack Pieniazek practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-15.