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

William Johnston, MD

Individual provider Emergency Medicine Physician · NPI 1417366584

William Johnston, MD is an Emergency Medicine in Palo Alto, California. Qualified in 2013, 13 years ago. Practices with Cep America - California, a 1,267-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
13
Licensed in
CA
In the registry since
2014
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3801 Miranda Ave
Palo Alto, CA 94304-1207
Phone: (650) 493-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 222 W 39th Ave, San Mateo, CA 94403-4364 — (650) 573-2222
  • 1200 El Camino Real, South San Francisco, CA 94080-3208 — (650) 742-2000
  • 30 Prospect Ave, Hackensack, NJ 07601-1914 — (551) 996-2000
  • 30 Prospect Ave, Hackensack, NJ 07601-1914 — (551) 996-2000

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A138944 (CA)

Record details

NPI number1417366584
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 3, 2014
Last updated in NPPESAugust 12, 2021
Certification dateAugust 12, 2021

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Cep America - California — 1267 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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