Timmen Cermak, M.D.
NPI 1235341330 · Addiction Psychiatry Physician · Mill Valley, CA
Timmen Cermak, M.D. is a Addiction Psychiatry Physician provider in Mill Valley, CA (NPI 1235341330).
Provider details
- NPI number
- 1235341330
- Entity type
- Individual
- Primary specialty
- Addiction Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G-31376 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2007-05-03
- Last updated
- 2007-07-08
Frequently asked questions
- What is Timmen Cermak's NPI number?
- Timmen Cermak's National Provider Identifier (NPI) is 1235341330, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timmen Cermak's specialty?
- Timmen Cermak is listed in the NPPES registry with a primary specialty of Addiction Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Timmen Cermak located?
- Timmen Cermak's practice location on file with NPPES is 239 Miller Avenue, Mill Valley, CA 94941.
- What is Timmen Cermak's phone number?
- The practice phone number listed in the NPPES registry for Timmen Cermak is (415) 381-4009.
- Is Timmen Cermak's NPI active?
- Yes — Timmen Cermak's NPI (1235341330) 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.