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

Mark S Penner, DO

Individual provider Emergency Medicine Physician · NPI 1689602500

Mark S Penner, DO practises Emergency Medicine in San Jose, California. Graduated from Western University of Health Sciences College of Dental Med in 1994, 32 years ago. Practices with Emergency Physicians Associates San Jose PC, a 133-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
32
Trained at
Western University of Health Sciences College of Dental Med
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

2105 Forest Ave
San Jose, CA 95128-1425 Not confirmed with CMS for 19 years — call before visiting
Phone: (408) 947-2500
Fax: (818) 587-2493
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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 20A8037 (CA)

Record details

NPI number1689602500
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 29, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolWESTERN UNIVERSITY OF HEALTH SCIENCES COLLEGE OF DENTAL MED
Graduated 1994 (32 years in practice)
Group practice Emergency Physicians Associates San Jose Pc — 133 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 patients419
Services billed 612 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 Emergency Physicians Associates San Jose PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 133 clinicians in the practice; 12 are shown here.

Other providers in San Jose