Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Colleen Ann Johnson, MD

Individual provider Emergency Medicine Physician · NPI 1720079049

Colleen Ann Johnson, MD practises Emergency Medicine in Pleasanton, California. Graduated from Stanford University School of Medicine in 2001, 25 years ago. Practices with Pleasanton Emergency Medical Group, a 38-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
25
Trained at
Stanford University School of Medicine
Licensed in
CA
In the registry since
2005
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

5555 W Las Positas Blvd
Pleasanton, CA 94588-4000
Phone: (209) 342-2300
Fax: (209) 524-4240
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A81584 (CA)

Record details

NPI number1720079049
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 4, 2005
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolSTANFORD UNIVERSITY SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Group practice Pleasanton Emergency Medical Group — 38 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients317
Services billed 431 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Pleasanton Emergency Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 38 clinicians in the practice; 12 are shown here.

Other providers in Pleasanton