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

Dr. Mary C Gessner-Peterson, DO

Individual provider Internal Medicine Physician · NPI 1861662884

Dr. Mary C Gessner-Peterson, DO is an Internal Medicine in Alpine, California. Graduated from Philadelphia College of Osteopathic Medicine in 2005, 21 years ago. Practices with Mary Gessner-Peterson Medical Group Inc, a 4-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Pennsylvania.

Years since qualifying
21
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
CA, PA
In the registry since
2008
Specialties on file
2
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.

See every abbreviation used in this directory →

Practice location Address checks out

2710 Alpine Blvd # 205
Alpine, CA 91901-2276
Phone: (619) 326-4445
Show map & directions

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

Additional practice locations (1)

  • 1730 Alpine Blvd Ste 109b, Alpine, CA 91901-3877 — (619) 326-4445

Specialties & licences

Emergency Medical Services (Emergency Medicine) Physician (primary) Taxonomy 207PE0004X · Licence OS014103 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 20A1174 (CA)

Record details

NPI number1861662884
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorYes
NPI enumeratedMarch 5, 2008
Last updated in NPPESSeptember 26, 2018

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2005 (21 years in practice)
Group practice Mary Gessner-Peterson Medical Group Inc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Alpine