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

Dr. Shamsundar Ramrattan, DO

Individual provider Internal Medicine Physician · NPI 1598968844

Dr. Shamsundar Ramrattan, DO is an Internal Medicine in Canyon Country, California. Graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 1993, 33 years ago. Practices with Choice Urgent Care, a 12-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
33
Trained at
Des Moines University of Osteopathic Medicine and Health Sciences
Licensed in
CA
In the registry since
2007
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

28504 Colhary Ct
Canyon Country, CA 91387-5316
Phone: (661) 252-7580
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2OA6991 (CA)

Record details

NPI number1598968844
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedJune 6, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolDES MOINES UNIVERSITY OF OSTEOPATHIC MEDICINE AND HEALTH SCIENCES
Graduated 1993 (33 years in practice)
Group practice Choice Urgent Care — 12 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Canyon Country