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

Ms. Catherine Lynn Milliken, LCSW, LADC, CCS

Addiction (Substance Use Disorder) Counselor in Portland, ME · enumerated 2006.

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

National Provider Identifier

1235204348

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Registry record

Entity type Individual (Type 1)

Name Ms. Catherine Lynn Milliken

Credential LCSW, LADC, CCS

Sex Female

Practice address Portland, ME, 04102

Phone (207) 233-4654

Enumeration date Nov 22, 2006

Last updated in NPPES Dec 10, 2021

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

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License CCS3670 (ME) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LC8123 (ME) Secondary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License LC3437 Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

What is the NPI number for Catherine Milliken?

The National Provider Identifier (NPI) for Catherine Milliken is 1235204348, a Type 1 (individual) record in the CMS NPPES registry.

Where does Catherine Milliken practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-10.