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

Individual provider Emergency Medicine Physician · NPI 1891717427

Christopher Joseph Markus, DO practises Emergency Medicine in Roseville, California. Qualified in 1993, 33 years ago. Practices with Vituity-California Observation Services PC, a 84-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
33
Licensed in
CA
In the registry since
2006
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.

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Practice location Address checks out

1 Medical Plaza Dr
Roseville, CA 95661-3037 Not confirmed with CMS for 19 years — call before visiting
Phone: (916) 781-1000
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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 20A7300 (CA)

Record details

NPI number1891717427
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 24, 2006
Last updated in NPPESOctober 26, 2007

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice Vituity-California Observation Services Pc — 84 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 patients135
Services billed 152 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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 Vituity-California Observation Services PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 84 clinicians in the practice; 12 are shown here.

Other providers in Roseville