Alexandra Sideroff, LMFT, LMHC
NPI 1356599831 · Marriage & Family Therapist · Berkeley, CA
Alexandra Sideroff, LMFT, LMHC is a Marriage & Family Therapist provider in Berkeley, CA (NPI 1356599831).
Provider details
- NPI number
- 1356599831
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT, LMHC
- Sex
- Female
- Sole proprietor
- Yes
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
17 yrs 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
Mailing address
Registry dates
- Enumerated
- 2008-09-09
- Last updated
- 2022-01-11
- Certified
- 2022-01-11
Frequently asked questions
- What is Alexandra Sideroff's NPI number?
- Alexandra Sideroff's National Provider Identifier (NPI) is 1356599831, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexandra Sideroff's specialty?
- Alexandra Sideroff is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Alexandra Sideroff located?
- Alexandra Sideroff's practice location on file with NPPES is 1918 Bonita Ave Ste 200, Berkeley, CA 94704-1014.
- What is Alexandra Sideroff's phone number?
- The practice phone number listed in the NPPES registry for Alexandra Sideroff is (415) 944-7685.
- Is Alexandra Sideroff's NPI active?
- Yes — Alexandra Sideroff's NPI (1356599831) is active in the NPPES registry as of the last update on 2022-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.