James Isherwood, LCSW
NPI 1861801151 · Clinical Social Worker · Clearlake, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Isherwood, LCSW is a Clinical Social Worker provider in Clearlake, CA (NPI 1861801151).
Provider details
- NPI number
- 1861801151
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 128618 (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
11 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
- 2014-08-12
- Last updated
- 2026-01-08
- Certified
- 2026-01-08
Frequently asked questions
- What is James Isherwood's NPI number?
- James Isherwood's National Provider Identifier (NPI) is 1861801151, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Isherwood's specialty?
- James Isherwood is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is James Isherwood located?
- James Isherwood's practice location on file with NPPES is 15230 Lakeshore Dr, Clearlake, CA 95422-8107.
- What is James Isherwood's phone number?
- The practice phone number listed in the NPPES registry for James Isherwood is (707) 995-4545.
- Does James Isherwood accept Medicare?
- James Isherwood is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Isherwood's NPI active?
- Yes — James Isherwood's NPI (1861801151) is active in the NPPES registry as of the last update on 2026-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.