2.3
59 Ratings with 19 written Reviews

Overview based on verified provider data
![]() | ![]() | ![]() | ![]() |
| Dr. Surianarayanan Karthikeyan, MD | Theresa Obonyano, APRN | Rachel Oliver, APRN | Ashley Anderson, APRN |
| Gastroenterology | Gastroenterology | Gastroenterology | Gastroenterology |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | Accepts New Patients |
| 48 Years of Experience | |||
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English | Speaks English | Speaks English | Speaks English |
| Oswego , NY | Sacramento , CA | Sacramento , CA | Sacramento , CA |
| Med School: MADRAS MEDICAL COLLEGE | Med School: The University of Texas Health Science Center at Houston | Med School: University of South Alabama | Med School: East Tennessee State University - Quillen College of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Dr. Surianarayanan Karthikeyan holds active and expired medical licenses in the states of North Dakota and New York.
Medical Doctor with an active medical license in the state of North Dakota that expires in 2026 and an expired medical license in the state of New York that expired in 2026.
Graduated from MADRAS MEDICAL COLLEGE in 1979 and Madras Medical College in 1978.
Dr. Karthikeyan's NPI number is 1881725836.










This provider profile is built using data from:
Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.