Nisha Viswanathan, MD

Nisha Viswanathan, MD

  • Internal Medicine
Average rating: 4.9
| 56 ratings
UCLA Health Santa Monica Extensivist | 1245 16th Street, Suite 305, Santa Monica, CA 90404


Dr. Nisha Viswanathan is a primary care and extensivist physician who practices in Santa Monica and Westwood. She works with medically complex patients and coordinates their care between the inpatient/hospital setting and the outpatient/clinic setting. She is Co-director of the UCLA Health COVID-19 ambulatory monitoring program and Director of the UCLA Long COVID program. She is a Fellow in the American College of Physicians, and is board certified in internal medicine.

Dr. Viswanathan received her medical degree from the University of Arkansas for Medical Sciences. She then completed her internal medicine residency at Mount Sinai Hospital in New York City. She earlier received her Bachelor of Science degree in biology from the University of Miami.

Dr. Viswanathan is a clinical instructor in the David Geffen School of Medicine at UCLA and is involved in resident education. She also researches gender-based differences in the medical profession, such as barriers that keep women from reaching leadership positions and why female physicians are promoted at a lower rate.

Dr. Viswanathan was raised in Little Rock, Arkansas. She speaks fluent Tamil and conversational Spanish. When not working, she enjoys outdoor activities, such as hiking and swimming, as well as traveling, reading, and hanging out with her husband and fluffy Shih Tzu.


English, Tamil


Medical Board Certification

Internal Medicine, American Board of Internal Medicine, 2015


Internal Medicine, Mount Sinai Medical Center, 2015


MD, University of Arkansas for Medical Sciences, 2012


  • Super Doctors® Southern California Rising Stars, 2023, 2024

Hospital Affiliations

Ronald Reagan UCLA Medical Center

UCLA Santa Monica Medical Center

Medical Services

Areas of Focus



  • Factors Associated with Post-Acute Sequelae of SARS-CoV-2 (PASC) After Diagnosis of Symptomatic COVID-19 in the Inpatient and Outpatient Setting in a Diverse Cohort. Link to


  • Aetna
  • Anthem Blue Cross
  • Blue Shield of California
  • Centivo
  • Cigna
  • First Health
  • Health Net of California
  • Interplan (part of HealthSmart)
  • L.A. Care
  • MultiPlan
  • UFCM Health System
  • Prime Health Services
  • Private Healthcare Systems (PHCS)
  • UnitedHealthcare

The list of health care plans above may not be comprehensive and could change. 
Please contact your benefits coordinator or health insurance company directly to verify coverage.

Visit our health insurance information page for more details.


  • Super Doctors® Southern California Rising Stars, 2023, 2024