Meet The Team

Diente Dental Team 

Elena Heredia, DDS

Dr. Elena Heredia is a native Californian who attended the University of California, Davis where she majored in Biological Studies. She obtained her Doctor of Dental Surgery degree from The University of California, San Francisco. Upon her graduation, she was recognized as the Dean's scholar for demonstrating outstanding academic achievement and community service. Since her graduation from dental school, Dr. Heredia strives to provide quality dental care with genuine commitment to the overall well-being of her patients. Dr. Heredia maintains professional memberships with the American Dental Association, California Dental Association, Academy of General Dentistry, and the San Francisco Dental Society. Dr. Heredia was born and raised in Los Angeles, California. She later relocated to Sacramento where she discovered her passion for dentistry. She is fluent is Spanish and resides in San Francisco with her family. 

Kathleen Marcelo, DDS

Dr. Marcelo grew up in Los Angeles, CA. She graduated from the University of California, Irvine with a Bachelor’s degree in Biological Sciences. She then continued her studies at the University of California, San Francisco (UCSF) where she earned her Doctor of Dental Surgery (DDS) degree. Afterwards, she completed a General Practice Residency at Cambridge Health Alliance/Harvard School of Dental Medicine in Boston, MA. During her residency, she participated in numerous dental public-health and community outreach events to serve the needs of the local community. She is also currently conducting dental research at the Department of Dentistry at Boston Children’s Hospital.

Dr. Marcelo provides quality dental care to help her patients achieve a healthy smile. More so, she holds great value and commitment to patient education, prevention and comprehensive dental care. Dr. Marcelo is a member of the American Dental Association and the California Dental Association.

In her free time, she enjoys going on group hiking trips and currently resides in Berkeley.  

Nanditha Ranganathan, DDS

Dr. Nanditha Ranganathan loves catering to the needs of our patients! She takes pride in providing patients with dental care that best suits their oral needs. Dr. Ranganathan earned her dental degree from Ohio State University. She was chief resident during her general practice residency at Miami Valley Hospital. She believes in listening to each patient and creating a partnership to maintain and improve lifelong oral health. Dr. Ranganathan is an active member of the San Francisco Dental Society, American Dental Association, and the CA Dental Association. Her outside interests include cooking and playing the piano. 


Office Manager

Cristina is dedicated to providing our patients with an amazing experience, beginning with the first phone call and continuing on throughout their visits.  She grew up in Napa Valley and has been in the dental field for over nineteen years and loves it! The best part of her job is helping patients understand how important oral health care is. She is also a fabulous dental assistant. Cristina makes sure everyone feels at home and leaves the office with a smile. She loves to joke around. In her free time, she enjoys football and camping with her family and friends.


Registered Dental Assistant

Helen Alfaro Ruiz was born and raised in the Excelsior District of San Francisco and graduated from San Francisco State University. She obtained her Bachelor of Arts in Dance and later pursued science which motivated her to become a Registered Dental Assistant. Helen is bilingual in Spanish and is a wonderful translator to our Spanish speaking patients. She has a passion for dancing and has been a part of the Brazilian group called Fogo Na Roupa for many years. In her free time she enjoys running, music, art and traveling.  



Insurance Coordinator

Raquel is a people person whose favorite part of the day is interacting with our patients and facilitating a positive experience with them. She has been in the dental field for over four years now. She is funny and makes everyone laugh! She works closely with all team members and patients to provide the ultimate care. Her goal with every patient is to help them become comfortable with the office and help them understand insurance benefits. She is a proud San Francisco native and a huge SF Giants fan. In her free time she loves to read, draw and go to concerts with friends



Dental Assistant

Ana Guadalupe Calero was born and raised in Nicaragua. She graduated from UNIJJAR in Managua, Nicaragua as a Dentist and managed her own clínic for a year. She recently moved to San Francisco where she is able to keep working in the field as a Dental Assistant. One of her goals is to continue learning in the dental field so she can continue educating our patients. Ana is bilingual in Spanish and she loves serving her community by helping others. Her hobbies include spending time with family, listening to music, dancing, and traveling to new places.


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Office Location

  • San Francisco
  • 2460 Mission St #102
  • San Francisco, California
  • 94110
  • Map & Directions
  • Call: (415) 282-8462