Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William S. Clark, DO

Individual provider Emergency Medicine Physician · NPI 1770690430

Dr. William S. Clark, DO is an Emergency Medicine in Escalon, California. Graduated from Chicago College of Osteopathy in 2000, 26 years ago. Practices with Cep America - California, a 1,267-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Indiana.

Years since qualifying
26
Trained at
Chicago College of Osteopathy
Licensed in
CA, IN
In the registry since
2006
Specialties on file
4
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

1631 4th St
Escalon, CA 95320-2007
Phone: (209) 838-3434
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1235 McHenry Ave, Modesto, CA 95350-5370 — (818) 398-8527

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 20A8748 (CA)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 02002521A (IN)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence 20A8748 (CA)
General Practice Physician Taxonomy 208D00000X · Licence 20A8748 (CA)

Record details

NPI number1770690430
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedAugust 25, 2006
Last updated in NPPESMay 12, 2022
Certification dateMay 12, 2022
Mailing address1235 McHenry Ave, Modesto, CA 95350-5370

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolCHICAGO COLLEGE OF OSTEOPATHY
Graduated 2000 (26 years in practice)
Group practice Cep America - California — 1267 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare