Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Hamilton

Counselor in Littleton, CO · enumerated 2018 · practices at Karla Hallacy Counseling.

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

National Provider Identifier

1346712510

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mark Hamilton

Sex Male

Practice address 621 Southpark Dr Ste 300, Littleton, CO, 80120

Phone (303) 909-8277

Enumeration date Dec 27, 2018

Last updated in NPPES Dec 27, 2018

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License LPC.0011808 (CO) Primary

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 Mark Hamilton?

The National Provider Identifier (NPI) for Mark Hamilton is 1346712510, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Hamilton practice?

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

Other providers at this practice address

Browse all →

Hunter Powell Physician Assistant · Littleton, CO NPI 1689215857 Karla Hallacy Counseling Professional Counselor · Littleton, CO NPI 1962097824

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-12-27.