Donald Tessmer, PSY.D.
NPI 1740400530 · School Psychologist · Los Angeles, CA
Donald Tessmer, PSY.D. is a School Psychologist provider in Los Angeles, CA (NPI 1740400530).
Provider details
- NPI number
- 1740400530
- Entity type
- Individual
- Primary specialty
- School PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- LEP (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
- 2007-04-26
- Last updated
- 2025-09-11
Frequently asked questions
- What is Donald Tessmer's NPI number?
- Donald Tessmer's National Provider Identifier (NPI) is 1740400530, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Tessmer's specialty?
- Donald Tessmer is listed in the NPPES registry with a primary specialty of School Psychologist (Behavioral Health & Social Service Providers).
- Where is Donald Tessmer located?
- Donald Tessmer's practice location on file with NPPES is 10436 Santa Monica Blvd, Los Angeles, CA 90025-6933.
- What is Donald Tessmer's phone number?
- The practice phone number listed in the NPPES registry for Donald Tessmer is (310) 393-2626.
- Is Donald Tessmer's NPI active?
- Yes — Donald Tessmer's NPI (1740400530) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.