Michael Tonjum, PH.D.
NPI 1104849728 · Clinical Psychologist · Santa Rosa, CA
Michael Tonjum, PH.D. is a Clinical Psychologist provider in Santa Rosa, CA (NPI 1104849728).
Provider details
- NPI number
- 1104849728
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY13055 (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
- 2006-07-25
- Last updated
- 2007-07-08
Frequently asked questions
- What is Michael Tonjum's NPI number?
- Michael Tonjum's National Provider Identifier (NPI) is 1104849728, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Tonjum's specialty?
- Michael Tonjum is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Michael Tonjum located?
- Michael Tonjum's practice location on file with NPPES is 1200 College Ave, Santa Rosa, CA 95404-3908.
- What is Michael Tonjum's phone number?
- The practice phone number listed in the NPPES registry for Michael Tonjum is (707) 568-2300.
- Is Michael Tonjum's NPI active?
- Yes — Michael Tonjum's NPI (1104849728) 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.