Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diane Mary Pettko, MS, LCADC

Addiction (Substance Use Disorder) Counselor in Prince Frederick, MD · enumerated 2015.

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

National Provider Identifier

1942694278

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Registry record

Entity type Individual (Type 1)

Name Diane Mary Pettko

Credential MS, LCADC

Sex Female

Practice address 280 Stafford Rd, Prince Frederick, MD, 20678

Phone (410) 535-3079

Fax (410) 535-2220

Enumeration date Mar 25, 2015

Last updated in NPPES Nov 29, 2022

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers 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.

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Frequently asked questions

What specialty is Diane Pettko?

Diane Pettko 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 2022-11-29.