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

Mark E Johnson, MD

Individual provider Emergency Medicine Physician · NPI 1669578357

Mark E Johnson, MD practises Emergency Medicine in Marysville, California. Graduated from Rush Medical College of Rush University in 2000, 26 years ago. Practices with Emergency Medicine Services of Tx, PLLC, a 358-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
26
Trained at
Rush Medical College of Rush University
Licensed in
WA
In the registry since
2006
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

724 5th St
Marysville, CA 95901-5646 Not confirmed with CMS for 11 years — call before visiting
Phone: (530) 749-3242
Fax: (530) 749-3248
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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 MD00044906 (WA)

Record details

NPI number1669578357
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 16, 2006
Last updated in NPPESJuly 2, 2015

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 2000 (26 years in practice)
Group practice Emergency Medicine Services Of Tx, Pllc — 358 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 patients60
Services billed 79 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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. Those with a page here are linked.

  • The Hospital At Westlake Medical Center Hospital · Austin, TX · listed as Westlake Surgical, LP
  • Methodist Hospital Hospital · San Antonio, TX
  • Methodist Hospital Stone Oak Hospital · San Antonio, TX

Colleagues at Emergency Medicine Services of Tx, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 358 clinicians in the practice; 12 are shown here.

Other providers in Marysville