Mary Ann Kassier, LCSW
NPI 1285850990 · Clinical Social Worker · Walnut Creek, CA
Mary Ann Kassier, LCSW is a Clinical Social Worker provider in Walnut Creek, CA (NPI 1285850990).
Provider details
- NPI number
- 1285850990
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- LCS10164 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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
Mailing address
Registry dates
- Enumerated
- 2007-04-18
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Ann Kassier's NPI number?
- Mary Ann Kassier's National Provider Identifier (NPI) is 1285850990, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ann Kassier's specialty?
- Mary Ann Kassier is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Ann Kassier located?
- Mary Ann Kassier's practice location on file with NPPES is 1849 Bonanza St, Walnut Creek, CA 94596-4317.
- What is Mary Ann Kassier's phone number?
- The practice phone number listed in the NPPES registry for Mary Ann Kassier is (925) 746-2624.
- Is Mary Ann Kassier's NPI active?
- Yes — Mary Ann Kassier's NPI (1285850990) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.