Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Mark Allan Nagel, M.A., LMFT

Q: What is the NPI number for Mark Nagel?

The National Provider Identifier (NPI) for Mark Nagel is 1700959657, a Type 1 (individual) record in the CMS NPPES registry.

Marriage & Family Therapist in Westminster, CO · enumerated 2006.

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

National Provider Identifier

1700959657

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark Allan Nagel

Credential M.A., LMFT

Sex Male

Practice address Westminster, CO, 80031

Phone (303) 668-1697

Fax (303) 430-5306

Enumeration date Nov 16, 2006

Last updated in NPPES Jan 12, 2010

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

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 162 (CO) Primary

LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

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 Mark Nagel practice?

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

What is the NPI number for Mark Nagel?

The National Provider Identifier (NPI) for Mark Nagel is 1700959657, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-12.