We welcome you to Clark-N-Oak Animal Health Center, where our goal is to deliver thorough and personalized care to our client’s pets. We have been serving the pets of Chicago’s downtown communities since 2007.


Steven Andres, DVM, Owner and Chief of Staff
Dr. Andres grew up in a rural community 60 miles west of Chicago. He had always wanted to become a veterinarian, and completed his degree in 2000. He graduated with a B.S. from Illinois State University and continued his education at Texas A&M University in Animal Nutrition. He then moved to a ranch in north central Wyoming (Ten Sleep) where he owned/managed a 300 cow/calf and a 2,200 ewe/lamb operation. He enjoyed the lifestyle, but missed some of the mental stimulation afforded in an urban environment.

A good friend from high school worked for The First National Bank of Chicago, which was looking for executive trainees with no banking experience. He was hired and began his banking career. Years later, after obtaining his degree in veterinary medicine and working at several clinics, Dr. Andres opened Clark-N-Oak Animal Health Center in the summer of 2007. He is a member of the CVMA (Chicago Veterinary Medical Association,  ISVMA (Illinois State Veterinary Medical Association), AVMA (American Veterinary Medical Association) and the AAFP American Association of Feline Practictioners), and was a member of the IUCAC committee at the Loyola University, Lake Shore campus which oversees ethical treatment of research animals for 10 years.  He also taught at The Animal Career Academy (South Loop) to introduce people to careers in animal care.

Elizabeth VanderVelde, DVM, Relief Doctor

Patricia Ho, DVM, Relief Doctor

Administrative Staff:

  1. Carol Gouge
  2. Lucy Taylor
  3. Sushma Gyawali

Business Manager:
 James Kleveland


  1. Arjun Thapa-Chhetri
  2. Desiree Portalatin
  3. Santosh Thapa-Chhetri
  4. Caterina Dentone
  5. Emily Fung