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

Derek Libby, CADC, MHRTC

Q: What is the NPI number for Derek Libby?

The National Provider Identifier (NPI) for Derek Libby is 1912685975, a Type 1 (individual) record in the CMS NPPES registry.

Addiction (Substance Use Disorder) Counselor in Chelsea, ME · enumerated 2023.

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

National Provider Identifier

1912685975

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Derek Libby

Credential CADC, MHRTC

Sex Male

Practice address Chelsea, ME, 04330

Phone (603) 204-4919

Enumeration date Jul 10, 2023

Last updated in NPPES Jul 10, 2023

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License CAC8536 (ME) 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 Derek Libby practice?

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

What is the NPI number for Derek Libby?

The National Provider Identifier (NPI) for Derek Libby is 1912685975, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-07-10.