Nav Singh, MD, FACOG
Dr. Singh moved to Las Vegas in September of 2017 with his wife, two children, two dogs and three cats. He also has two adult sons, an interest in music and photography and enjoys trying out all of the culinary delights Las Vegas has to offer.
He started in practice in Cincinnati, Ohio. While in Cincinnati he was recipient of numerous patient care awards. He received the Patients Choice Award from 2011 to 2015 and Most Compassionate Doctor 2012 through 2015. In 2015, he was voted Top 10 Doctors of Cincinnati. In Las Vegas, he practiced at New Beginnings for two years before accepting the offer to take over for retiring physician, Dr. Gex. Dr. Singh loves running his own practice and is grateful for this opportunity to make WHASN Southwest a valued part of the Las Vegas healthcare community.
Dr. Singh's mission is to provide compassionate care through all stages of a women’s life with the highest level of medical expertise.
EDUCATION, CERTIFICATION & POSTS
- Undergraduate Degree: Northwestern University
- Medical School: The Ohio State University
- Residency in Obstetrics and Gynecology: University of Cincinnati Medical Center
- Board Certified: American Board of Obstetrics and Gynecology
- Fellow, American College of Obstetricians and Gynecologists
- Chairman Department of Obstetrics and Gynecology at Dignity Health - St. Rose Dominican Hospital, San Martin Campus 2020-2022
- Vice Chief of Staff, St. Rose Dominican Hospital, San Martin Campus. 2022-2023
- National speaker for Hologic Medical Devices 2010-current
- National speak for Natera, and CBR
- Chief of Obstetrics at Southern Hills Hospital 2023-current
Alex Ross, MD
Dr. Alexandra Ross is an OB/GYN who is passionate about providing comprehensive, compassionate care to women throughout every stage of life. She believes in creating a comfortable, supportive environment where every patient feels heard and empowered in their healthcare decisions.
Originally from Atlanta, Georgia, Dr. Ross earned her Bachelor of Science in Biology and Psychology as a double major from the University of Georgia in 2017. She went on to attend the University of South Carolina School of Medicine, where her clinical rotations confirmed her passion for obstetrics and gynecology and her desire to care for women through some of the most meaningful moments of their lives.
In 2022, Dr. Ross relocated to Las Vegas with her husband and began her OB/GYN residency at the University of Nevada, Las Vegas (UNLV). She completed her residency training in June of 2026 and is excited to continue caring for the Las Vegas community she has come to call home.
Dr. Ross is dedicated to providing individualized, evidence-based care while building lasting relationships with her patients. Outside of the office, she enjoys traveling, reading books, spending time with her husband, and exploring all that Las Vegas and the surrounding area have to offer.
Tamaris Cotta, nurse practitioner
- My name is Tamaris Cotta, APRN and I’m a native Nevadan. I received my Bachelor’s of Science in Nursing from The University of Nevada Las Vegas in 2008 and my Master’s degree in Nursing (specializing in Women's Healthcare) from the University of Cincinnati in 2012. After working 2 years as a Registered Nurse in long-term care, I decided to pursue my passion in women’s healthcare as it allows me to be an advocate for women through the various stages of their lives. I started as a Women's Health Nurse Practitioner working in one of the busiest women’s clinics in Fresno, California and gained a vast amount of experience and knowledge working with the underserved community there. I worked for clinics in both Northern and Southern Nevada before joining the organization of WHASN. I’ve now been a part of WHASN since 2017. I love hiking, traveling, and spending time with my husband and son.
Education and Certifications
- University Nevada Las Vegas - Bachelor's of Science in Nursing 2008
- University of Cincinnati - Master's of Science in Nursing (Women's Healthcare) 2012
- Certified Women's Health Care Nurse Practitioner through the National Certification Corporation 2013
Olga Dorlon, physician's assistant
Olga Dorlon, PA-C is a Board Certified Physician Assistant with more than 16 years experience in the medical profession. Originally from Eastern Europe, she received her Doctor of Medicine from Kiev National Medical University and completed her residency at Kiev Obstetrical Hospital #3. She moved to Las Vegas/Henderson in 2003 and received her Masters of Physician Assistant from Touro University. She has been a provider with WHASN Southwest since 2015.
Educational Background
- Kiev National Medical University, Kiev,
- Ukraine Degree – Doctor of Medicine University –
- Touro University, Henderson, Nevada
- Degree – Masters of Physician Assistant
- Residency – Kiev Obstetrical Hospital Number Three (Obstetrics and Gynecology)
Board Certifications
- National Commission on Certification of Physician Assistants
My Mission
- I specialize in all aspects of women’s health care, treating patients with individualized compassionate care, focusing on the whole woman and her needs until healing is complete.
Clinical special interests
- abnormal PAP f/u, colposcopy diagnostic and treatment plans
- long term reversible contraception – Intrauterine device/Nexplanon implant insertions and removal
- reproductive endocrinology
- postmenopausal hormone replacement therapy
Personal interests
- I enjoy hiking/camping, skiing, exercising, and spending quality time with my twin sons.