NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark R Lees, CADC-CAS

Addiction (Substance Use Disorder) Counselor in Oceanside, CA · enumerated 2007 · practices at Mission Treatment Services, Inc..

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

National Provider Identifier

1477672699

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mark R Lees
Credential CADC-CAS
Sex Male
Practice address 1905 Apple St Ste 3, Oceanside, CA, 92054
Phone (760) 547-1280
Enumeration date Mar 28, 2007
Last updated in NPPES Apr 9, 2020

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Secondary
106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 75237 (CA) Secondary
101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 01-069225 (CA) 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

Where does Mark Lees practice?
The practice location on file with NPPES is in Oceanside, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Lees?
The National Provider Identifier (NPI) for Mark Lees is 1477672699, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-09.