Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Jo Chaffee, LMHC,LADC,CAS

Addiction (Substance Use Disorder) Counselor in Jamaica Plain, MA · enumerated 2007.

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

National Provider Identifier

1356565386

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Registry record

Entity type Individual (Type 1)

Name Ms. Jo Chaffee

Credential LMHC,LADC,CAS

Sex Female

Practice address 31 Heath St, Jamaica Plain, MA, 02130

Phone (617) 523-6400

Fax (617) 622-1086

Enumeration date Apr 12, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 162 (MA) Secondary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 4244 (MA) Primary

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 3805 (MA) Secondary

Other identifiers

Identifier	Type	State	Issuer
1303414	Medicaid	MA	-

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 specialty is Jo Chaffee?

Jo Chaffee is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.