Karl John Arellano, RN
NPI 1023907516 · Child & Adolescent Psychiatric/Mental Health Registered Nurse · Martinez, CA
Karl John Arellano, RN is a Child & Adolescent Psychiatric/Mental Health Registered Nurse provider in Martinez, CA (NPI 1023907516).
Provider details
- NPI number
- 1023907516
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatric/Mental Health Registered NurseNursing Service Providers
- Credential
- RN
- Sex
- Male
- Sole proprietor
- Yes
- License
- 95350239 (CA)
Specialties & taxonomies
Nursing Service Providers
Nursing Service Providers
Nursing Service Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% 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)
- 1340 Arnold Dr Ste 200Martinez, CA 94553-4189Phone: (510) 630-0312
Registry dates
- Enumerated
- 2025-06-30
- Last updated
- 2025-06-30
- Certified
- 2025-06-30
Frequently asked questions
- What is Karl John Arellano's NPI number?
- Karl John Arellano's National Provider Identifier (NPI) is 1023907516, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl John Arellano's specialty?
- Karl John Arellano is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatric/Mental Health Registered Nurse (Nursing Service Providers).
- Where is Karl John Arellano located?
- Karl John Arellano's practice location on file with NPPES is 1340 Arnold Dr Ste 200, Martinez, CA 94553-4189.
- What is Karl John Arellano's phone number?
- The practice phone number listed in the NPPES registry for Karl John Arellano is (510) 630-0312.
- Is Karl John Arellano's NPI active?
- Yes — Karl John Arellano's NPI (1023907516) is active in the NPPES registry as of the last update on 2025-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.