What is Karen Mahan's NPI number?

Karen Mahan's National Provider Identifier (NPI) is 1992679039, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Karen Mahan's specialty?

Karen Mahan is listed in the NPPES registry with a primary specialty of School Counselor (Behavioral Health & Social Service Providers).

Where is Karen Mahan located?

Karen Mahan's practice location on file with NPPES is 4700 Sand Creek Road, Antioch, CA 94531.

What is Karen Mahan's phone number?

The practice phone number listed in the NPPES registry for Karen Mahan is (925) 779-7540.

Is Karen Mahan's NPI active?

Yes — Karen Mahan's NPI (1992679039) is active in the NPPES registry as of the last update on 2025-10-01.

IndividualActive

Karen Mahan

NPI 1992679039 · School Counselor · Antioch, CA

Karen Mahan is a School Counselor provider in Antioch, CA (NPI 1992679039).

Provider details

NPI number: 1992679039
Entity type: Individual
Primary specialty: School CounselorBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: Yes

Specialties & taxonomies

School CounselorPrimary101YS0200X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(47/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

4700 Sand Creek Road

Antioch, CA 94531

Phone: (925) 779-7540

Fax: (925) 779-7542

Approximate (ZIP-level) locationGet directions

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Mailing address