Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Mr. James William Isherwood III, LCSW

Individual provider Clinical Social Worker · NPI 1861801151

Mr. James William Isherwood III, LCSW is a Clinical Social Worker in Clearlake, California. Qualified in 2015, 11 years ago. Practices with Adventist Health Clearlake Hospital Inc, a 86-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
11
Licensed in
CA
In the registry since
2014
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

15230 Lakeshore Dr
Clearlake, CA 95422-8107
Phone: (707) 995-4545
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 128618 (CA)

Record details

NPI number1861801151
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedAugust 12, 2014
Last updated in NPPESJanuary 8, 2026
Certification dateJanuary 8, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Adventist Health Clearlake Hospital Inc. — 86 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Colleagues at Adventist Health Clearlake Hospital Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 86 clinicians in the practice; 12 are shown here.

Other providers in Clearlake