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

Mark Abraham Marshall

Individual provider Emergency Medicine Physician · NPI 1457595001

Mark Abraham Marshall practises Emergency Medicine in Rosevill, California. Qualified in 2009, 17 years ago. Practices with Cep America - California, a 1,267-clinician group and accepts Medicare assignment. Licensed in California and Ohio.

Years since qualifying
17
Licensed in
CA, OH
In the registry since
2009
Specialties on file
3

Practice location Address checks out

3300 Douglas Blvd Ste 405 Emp
Rosevill, CA 95661 Not confirmed with CMS for 14 years — call before visiting
Phone: (330) 493-4443
Show map & directions

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

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 20A 12191 (CA)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 34. 010307 (OH)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1457595001
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedApril 27, 2009
Last updated in NPPESJuly 17, 2012

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice Cep America - California — 1267 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 patients356
Services billed 568 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 Cep America - California

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1267 clinicians in the practice; 12 are shown here.