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

Mr. Clark Lewis Johnson, LMFT

Marriage & Family Therapist in Keene, NH · enumerated 2008.

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

National Provider Identifier

1528239399

Verified

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Registry record

Entity type Individual (Type 1)

Name Mr. Clark Lewis Johnson

Credential LMFT

Sex Male

Practice address Keene, NH, 03431

Phone (603) 357-1180

Fax (603) 357-1185

Enumeration date Mar 19, 2008

Last updated in NPPES Feb 18, 2010

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

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 0029 (NH) Primary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 100-0000013 (VT) Secondary

LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

Other identifiers

Identifier	Type	State	Issuer
30426647	Medicaid	NH	-

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 Clark Johnson practice?

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

What is the NPI number for Clark Johnson?

The National Provider Identifier (NPI) for Clark Johnson is 1528239399, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Erica Zinter Social Worker · Keene, NH NPI 1023087988 Karen Rodden Periodontics · Keene, NH NPI 1023187929 Jeffrey Rodden Periodontics · Keene, NH NPI 1811066814 Keene Periodontic Specialists LLC Periodontics · Keene, NH NPI 1275602179 Paula-Ayn Phillips Mental Health Counselor · Keene, NH NPI 1780755157 Carin Torp Mental Health Counselor · Keene, NH NPI 1720143993 Janet Rounds Acupuncturist · Keene, NH NPI 1891821450 Charles Gorsuch Chiropractor · Keene, NH NPI 1588793020

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-18.