Mary Leff, M.S.
NPI 1053434902 · Marriage & Family Therapist · Berkeley, CA
Mary Leff, M.S. is a Marriage & Family Therapist provider in Berkeley, CA (NPI 1053434902).
Provider details
- NPI number
- 1053434902
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- M.S.
- Sex
- Female
- Sole proprietor
- Yes
- License
- MFC15417 (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
- 2007-04-07
- Last updated
- 2017-04-26
Frequently asked questions
- What is Mary Leff's NPI number?
- Mary Leff's National Provider Identifier (NPI) is 1053434902, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Leff's specialty?
- Mary Leff is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mary Leff located?
- Mary Leff's practice location on file with NPPES is 1409 Edith St, Berkeley, CA 94703-1121.
- What is Mary Leff's phone number?
- The practice phone number listed in the NPPES registry for Mary Leff is (510) 526-4246.
- Is Mary Leff's NPI active?
- Yes — Mary Leff's NPI (1053434902) is active in the NPPES registry as of the last update on 2017-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.