Mary O'Neil, M.S., MFT
NPI 1699827782 · Marriage & Family Therapist · Walnut Creek, CA
Mary O'Neil, M.S., MFT is a Marriage & Family Therapist provider in Walnut Creek, CA (NPI 1699827782).
Provider details
- NPI number
- 1699827782
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- M.S., MFT
- Sex
- Female
- Sole proprietor
- No
- License
- 17024 (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
- 2007-01-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary O'Neil's NPI number?
- Mary O'Neil's National Provider Identifier (NPI) is 1699827782, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary O'Neil's specialty?
- Mary O'Neil is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mary O'Neil located?
- Mary O'Neil's practice location on file with NPPES is 710 S Broadway, Walnut Creek, CA 94596-5294.
- What is Mary O'Neil's phone number?
- The practice phone number listed in the NPPES registry for Mary O'Neil is (925) 295-5371.
- Is Mary O'Neil's NPI active?
- Yes — Mary O'Neil's NPI (1699827782) 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.