Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nathaniel P Clark, LCPC-C

Professional Counselor in Portland, ME · enumerated 2016 · practices at Catholic Charities Maine.

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

National Provider Identifier

1891155792

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Registry record

Entity type Individual (Type 1)

Name Nathaniel P Clark

Credential LCPC-C

Sex Male

Practice address 11 Baxter Blvd, Portland, ME, 04101

Phone (207) 774-8700

Fax (207) 422-7268

Enumeration date Mar 4, 2016

Last updated in NPPES Jan 9, 2024

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License CC5420 (ME) Primary

101Y00000X Counselor Behavioral Health & Social Service Providers · License XL4658 (ME) Secondary

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 Nathaniel Clark?

The National Provider Identifier (NPI) for Nathaniel Clark is 1891155792, a Type 1 (individual) record in the CMS NPPES registry.

Where does Nathaniel Clark practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-09.