IndividualActive
Katherine Twohy, PH D
NPI 1316993439 · Clinical Psychologist · Norwalk, CA
Katherine Twohy, PH D is a Clinical Psychologist provider in Norwalk, CA (NPI 1316993439).
Provider details
- NPI number
- 1316993439
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH D
- Sex
- Female
- License
- PSY15089 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
11401 South Bloomfield Avenue
Norwalk, CA 90650
Phone: (562) 863-7011
Fax: (562) 864-4560
Street-level locationGet directions
Mailing address
1600 9th Street
Sacramento, CA 95814-6414
Registry dates
- Enumerated
- 2006-05-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Katherine Twohy's NPI number?
- Katherine Twohy's National Provider Identifier (NPI) is 1316993439, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Twohy's specialty?
- Katherine Twohy is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Katherine Twohy located?
- Katherine Twohy's practice location on file with NPPES is 11401 South Bloomfield Avenue, Norwalk, CA 90650.
- What is Katherine Twohy's phone number?
- The practice phone number listed in the NPPES registry for Katherine Twohy is (562) 863-7011.
- Is Katherine Twohy's NPI active?
- Yes — Katherine Twohy's NPI (1316993439) 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.