What is Mary John's NPI number?

Mary John's National Provider Identifier (NPI) is 1841081973, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mary John's specialty?

Mary John is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).

Where is Mary John located?

Mary John's practice location on file with NPPES is 956 Natchez Dr, Walnut Creek, CA 94598-4434.

What is Mary John's phone number?

The practice phone number listed in the NPPES registry for Mary John is (925) 212-5204.

Is Mary John's NPI active?

Yes — Mary John's NPI (1841081973) is active in the NPPES registry as of the last update on 2025-05-16.

IndividualActive

Mary John

NPI 1841081973 · Addiction (Substance Use Disorder) Counselor · Walnut Creek, CA

Mary John is a Addiction (Substance Use Disorder) Counselor provider in Walnut Creek, CA (NPI 1841081973).

Provider details

NPI number: 1841081973
Entity type: Individual
Primary specialty: Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: No

Specialties & taxonomies

Addiction (Substance Use Disorder) CounselorPrimary101YA0400X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(48/100 index)

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

Registry tenure38% of score
1 yr in NPPES 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

956 Natchez Dr

Walnut Creek, CA 94598-4434

Phone: (925) 212-5204

Street-level locationGet directions

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Mailing address