Internal Medicine

Internal Medicine Services

We are available to assist in the diagnosis and management of dogs and cats with gastrointestinal disorders, hepatic or pancreatic diseases, liver or bladder diseases, upper and lower airway diseases (including nasal disease), endocrine and other metabolic disorders, and infectious diseases. Additional services include:

  • Endoscopy Services: Gastrointestinal endoscopy, bronchoscopy, rhinoscopy, and cystoscopy services are available as part of the diagnostic and therapeutic options we can provide. We also offer laparoscopic-assisted liver biopsy, laser lithotripsy, and ectopic ureter laser correction.
  • Advanced diagnostic and therapeutic procedures: We offer advanced diagnostic evaluation of patients, including bone marrow aspiration or biopsy, transtracheal washes, and arthrocentesis (joint taps). Feeding tube placement is routinely performed by our clinicians.
  • Collaboration with other services for diagnostic evaluation of patients: We work closely with our Diagnostic Imaging service to provide radioactive iodine therapy for treatment of feline hyperthyroidism (pet owner informationreferral information), and incorporate advanced imaging (CT, MRI, fluoroscopy) and traditional radiography and ultrasonography. We consult with other services (including our Behavior, Cardiology, Dermatology, Emergency and Critical Care, Neurology, Oncology, and Soft Tissue Surgery services) to offer optimal care for those patients with multi-systemic illnesses.

Nutrition Services

We will review your pet's medical and diet history, evaluate his or her current diet, discuss appropriate feeding strategies for your pet, answer your nutrition questions and provide written recommendations to you and your veterinarian for commercial diets, treats and supplements (if applicable) to meet your pet's individual nutritional needs.

Examples of services provided include:

  • Optimized commercial diet selection
  • Customized home-cooked diet formulations
  • Nutritional plans for pets with medical conditions such as gastrointestinal disease, heart disease, kidney disease, cancer or multi-systemic illnesses
  • Assistance with feeding tubes

A completed diet history form must be received prior to your scheduled nutrition appointment. For more information about our Nutrition services click here.

Your Visit

Each patient is cared for by a team, which typically includes a faculty member in internal medicine (a board-certified specialist with many years of clinical experience), a resident (a graduate veterinarian who has completed an internship and is training to become a specialist in internal medicine) or intern (a graduate veterinarian in an earlier phase of post-graduate training than a resident), a fourth-year veterinary student (a veterinarian-in-training in his or her final year of veterinary school), and an experienced registered veterinary technician (nurse).

In order to facilitate same-day diagnostic testing, we request that all patients be fasted prior to their appointment (water is ok) except those with specific nutritional needs such as diabetic patients and juvenile small breed dogs. In order to reduce duplication of previous testing, please bring copies of all medical records, diagnostic test results, and any radiographs/other imaging to their pet's appointment. Please be aware that most procedures involving anesthesia will not be performed the day of the first appointment.

Clinical Trials

The Small Animal Internal Medicine Service is often recruiting patients for a number of studies for which your pet may be eligible. If you have any questions regarding your pet's eligibility, please contact the Clinical Trials Office ( Our current trials include:

Extending remission (Insulin-independent state) time in former diabetic cats

To evaluate the benefit of Bydureon for maintaining diabetic cats in remission (in an insulin-independent state).

The purpose of this study is to evaluate a new rapid test for identifying and characterizing bacterial infections in the bladder of cats.
Cats with diabetes in remission (No longer receiving insulin): The purpose of this study is to develop a test for early diagnosis of pre-diabetes, prior to the presence of clinical signs of diabetes. In the future this will enable implementation of targeted preventive measures to slow or prevent the progression from pre-diabetes to diabetes in cats at risk.
Effect of a probiotic bacterium in dogs with Inflammatory Bowel Disease.
The purpose of this study is to  measure the effect of a probiotic (Akkermansia muciniphila) on intestinal permeability, inflammation, and GLP-2 secretion in with naturally occurring IBD that failed conventional treatments (other than immunosuppressive drugs).
The purpose of this study is to determine how various nutritional and hormonal factors are affected in dogs with chronic kidney disease (CKD). We will evaluate concentrations of vitamin D metabolites and other hormones (e.g., parathyroid hormone) that can affect the development of renal secondary hyperparathyroidism (RHPT) in order to then develop novel medical and dietary therapeutic strategies.
Purpose: The purpose of this study is to determine how amino acid status and markers of inflammation are affected in dogs with PLN. We will evaluate plasma amino acid concentrations and markers of inflammation [C-reactive protein (CRP); tumor-necrosis factor-α (TNF- α); interleukin-6 (IL-6)] in order to then develop novel medical and dietary therapeutic strategies for dogs with PLN.

Appointments & Office Hours

  • Office hours: 8am – 5pm Monday - Friday
  • Patient visits are by appointment only or emergencies by referral through your veterinarian (our referral secretary is Stephanie Yochem).
  • Internal Medicine patients are seen as follows:
    Monday through Friday morning
  • For an appointment: (614) 292-3551
  • After hours/weekend emergencies: (614)-292-3551


Internal Medicine faculty

  • Catherine Langston, DVM, Diplomate ACVIM, Associate Professor, Service Head - Small Animal Internal Medicine
  • Julie Byron, DVM, MS, DACVIM, Associate Professor-Clinical: urology/internal medicine
  • Valerie Parker,DVM, DACVIM, DACVN: Assistant Professor-Clinical: nutrition/internal medicine
  • Adam Rudinsky, DVM, MS, DACVIM, Instructor-Practice: internal medicine

Internal Medicine residents

Internal Medicine technicians


Payment is expected at the time of your visit. Please read our payment policy for complete information.