About Anastasia K. Grebeck, PA-C

Anastasia is a compassionate, certified Physician Assistant dedicated to helping patients optimize wellness through nutritional education and support. Her clinical interests include general gastroenterology, women’s digestive health and weight management. Prior to joining Gastro Health, Anastasia served as a Physician Assistant in a sleep medicine specialty practice for two years. 

In 2013, Anastasia graduated with her Bachelor of Science degree with a concentration in Nutrition from the University of Scranton in Scranton, Pennsylvania. In May 2018, she earned her Master of Science degree in Physician Assistant Studies from Marywood University. She is a recipient of the Didactic Medal of Excellence. 

Anastasia is certified through the (NCCPA), National Commission on Certification of Physician Assistants and holds an additional certification as a Strength and Conditioning Specialist through the National Strength and Conditioning Association. 

Conditions & Procedures

  • Abdominal Pain
  • Acid Reflux & GERD
  • Anal Fissures
  • Barrett's Esophagus
  • Colon Cancer Screening
  • Constipation
  • Dysphagia
  • Gastritis
  • Gastrointestinal Bleeding
  • Hemorrhoids

Office Locations

Primary Location

Picture of the Fairfax Office


3028 Javier Rd.
Suite 300
Fairfax, VA 22031

Phone: 703-698-8960
Fax: 703-828-0961

Additional Locations


3914 Centreville Rd.
Suite 350
Chantilly, VA 20151

Phone: 703-698-8960
Fax: 703-828-0961


Fair Oaks

3700 Joseph Siewick Dr.
Suite 308
Fairfax, VA 22033

Phone: 703-698-8960
Fax: 703-828-0961


Procedure Locations

Having a procedure? It may not always be in the same location where you consulted with your doctor. Check with your doctor to make sure you’re headed to the right place.



Marywood University

Professional Highlights


Board Certified in Physician Assistant

Awards & Recognitions

  • Didactic Medal of Excellence Recipient