Mr. Jan Michael Veselak III

Mr. Jan Michael Veselak III is a Addiction (Substance Use Disorder) Counselor provider (Counselor) practicing in Aurora, CO, registered in the NPPES registry with NPI 1366622821 since 2007.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1366622821
Entity type	Individual (Type 1)
Name	Mr. Jan Michael Veselak III
Sex	Male
Practice address	Aurora, CO, 80012
Phone	3037186853
Enumeration date	2007-11-13
Last updated in NPPES	2007-11-13

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
101YA0400X	Addiction (Substance Use Disorder) Counselor	Primary	136	CO

Copy-ready billing details

Provider: Jan Veselak
NPI: 1366622821
Taxonomy: 101YA0400X (Addiction (Substance Use Disorder) Counselor)
Address: Aurora, CO, 80012

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1992704795	Steven Rush	Individual	General Practice Dentistry	Aurora, CO
1275534257	Barry Wohlgemuth	Individual	General Practice Dentistry	Aurora, CO
1770590879	Tanya Accurso	Individual	Physical Therapist	Aurora, CO
1417030842	Christina Veselak	Individual	Marriage & Family Therapist	Aurora, CO
1356514293	Sharron Milliron	Individual	Mental Health Counselor	Aurora, CO
1326372665	Virginia Nigro	Individual	Counselor	Aurora, CO
1770817025	John Cogley	Individual	Forensic Psychologist	Aurora, CO
1710206982	Pamela Mills	Individual	Mental Health Counselor	Aurora, CO

Verify this record

Cross-check NPI 1366622821 against the authoritative CMS record: view Mr. Jan Michael Veselak III on the official NPPES registry .

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 or validate an NPI number.

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 Jan Veselak?

Jan Veselak is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-11-13.