Courtney Derosia, M.S.
NPI 1548600562 · Marriage & Family Therapist · Fontana, CA
Courtney Derosia, M.S. is a Marriage & Family Therapist provider in Fontana, CA (NPI 1548600562).
Provider details
- NPI number
- 1548600562
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- M.S.
- Sex
- Female
- Sole proprietor
- No
- License
- 87985 (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
12 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
- 2013-07-05
- Last updated
- 2020-01-10
- Certified
- 2020-01-10
Frequently asked questions
- What is Courtney Derosia's NPI number?
- Courtney Derosia's National Provider Identifier (NPI) is 1548600562, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Courtney Derosia's specialty?
- Courtney Derosia is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Courtney Derosia located?
- Courtney Derosia's practice location on file with NPPES is 9310 Sierra Ave, Fontana, CA 92335-5711.
- What is Courtney Derosia's phone number?
- The practice phone number listed in the NPPES registry for Courtney Derosia is (866) 205-3595.
- Is Courtney Derosia's NPI active?
- Yes — Courtney Derosia's NPI (1548600562) is active in the NPPES registry as of the last update on 2020-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.