Leonard Donk, PHD
NPI 1942420591 · Clinical Child & Adolescent Psychologist · Cupertino, CA
Leonard Donk, PHD is a Clinical Child & Adolescent Psychologist provider in Cupertino, CA (NPI 1942420591).
Provider details
- NPI number
- 1942420591
- Entity type
- Individual
- Primary specialty
- Clinical Child & Adolescent PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 9064 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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 Leonard Donk's NPI number?
- Leonard Donk's National Provider Identifier (NPI) is 1942420591, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Donk's specialty?
- Leonard Donk is listed in the NPPES registry with a primary specialty of Clinical Child & Adolescent Psychologist (Behavioral Health & Social Service Providers).
- Where is Leonard Donk located?
- Leonard Donk's practice location on file with NPPES is 20111 Stevens Creek Blvd, Cupertino, CA 95014-2399.
- What is Leonard Donk's phone number?
- The practice phone number listed in the NPPES registry for Leonard Donk is (408) 366-9910.
- Is Leonard Donk's NPI active?
- Yes — Leonard Donk's NPI (1942420591) 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.