Stefan Keyser
NPI 1235477423 · Marriage & Family Therapist · Grass Valley, CA
Enrolled with Medicare as Practitioner - Marriage and Family Therapist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stefan Keyser is a Marriage & Family Therapist provider in Grass Valley, CA (NPI 1235477423).
Provider details
- NPI number
- 1235477423
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Mental Health Counselor101YM0800X
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
13 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 3800 Coolidge AveOakland, CA 94602-3311Phone: (510) 485-5381Fax: (510) 530-2047
Registry dates
- Enumerated
- 2013-01-22
- Last updated
- 2021-02-01
- Certified
- 2021-02-01
Frequently asked questions
- What is Stefan Keyser's NPI number?
- Stefan Keyser's National Provider Identifier (NPI) is 1235477423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stefan Keyser's specialty?
- Stefan Keyser is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Stefan Keyser located?
- Stefan Keyser's practice location on file with NPPES is 500 Crown Point Cir Ste 100, Grass Valley, CA 95945-9561.
- What is Stefan Keyser's phone number?
- The practice phone number listed in the NPPES registry for Stefan Keyser is (530) 273-5440.
- Does Stefan Keyser accept Medicare?
- Stefan Keyser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stefan Keyser's NPI active?
- Yes — Stefan Keyser's NPI (1235477423) is active in the NPPES registry as of the last update on 2021-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.