Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen Mark Sundby, PH.D., LPC, CDC I

Counselor in Cordova, AK · enumerated 2007.

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

National Provider Identifier

1609907393

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen Mark Sundby

Credential PH.D., LPC, CDC I

Sex Male

Practice address 602 Chase Ave, Cordova, AK, 99574

Phone (907) 424-8300

Fax (907) 424-8645

Enumeration date Mar 7, 2007

Last updated in NPPES Jul 1, 2010

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License 245 (AK) Primary

101Y00000X Counselor Behavioral Health & Social Service Providers · License 16231 (TX) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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 Stephen Sundby practice?

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

What is the NPI number for Stephen Sundby?

The National Provider Identifier (NPI) for Stephen Sundby is 1609907393, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-01.