A. Sherwood Johnson, DVM
Diplomate, ACVIM (Internal Medicine)
Dr. Johnson earned an undergraduate degree in Chemistry from Pomona College in 1989. After a year in England performing foot and mouth disease vaccine research, he returned to obtain his veterinary degree from North Carolina State University in 1994. After completing a year of internship at Michigan State University and a 3-year residency in internal medicine at The Ohio State University College of Veterinary Medicine in 1998, he moved to Boston to pursue a Ph.D. in cancer biology at Harvard Medical School. In 2000, Dr. Johnson became a Diplomate of the American College of Veterinary Internal Medicine and founded the internal medicine service at Massachusetts Veterinary Referral Hospital. He moved to Pittsburgh in 2004 to be closer to family and to establish Veterinary Medical Specialists of Pittsburgh, Inc.

Dr. Johnson has a wide range of clinical interests and skills, with particular interest in urinary disease, immune-mediated disease, oncology/chemotherapy, endocrinology, ultrasound, endoscopy and cytology.

When he is not working, Dr. Johnson enjoys family, sports, the outdoors, fishing, sailing, music, and woodworking. Dr. Johnson was married in 2000 (his wife is also a veterinarian), and has two sons, two dogs, three cats, and fish.

The American College of Veterinary Internal Medicine (ACVIM) was established in 1973. Currently, there are approximately 300 board-certified small-animal internists in private practice in the United States. Qualifications to become a Board-Certified Small Animal Internist (Diplomate of the American College of Veterinary Internal Medicine) include:
- Graduation from an accredited veterinary school with a DVM or VMD degree
- 1 year medical / surgical internship
- 3-year ACVIM-approved veterinary internal medicine residency
- Teaching and lecturing veterinary students in class and clinics
- Lecturing to general practitioners at continuing education seminars
- Publication in the veterinary literature
- Presentation of 3 passing case reports
- Advanced course work and laboratory research relevant to internal medicine
- Completion of comprehensive written and practical examinations administered by the ACVIM