The full answer
Yes — periodic follow-up testing is standard practice
After starting a gluten-free diet, doctors typically recommend repeat antibody blood tests (the same tTG-IgA test used for diagnosis) periodically to confirm antibody levels are dropping, which is a good indicator that gluten is being successfully avoided and the intestine is healing.
What else is often checked
Follow-up visits often also screen for nutrient deficiencies and, in some cases, bone density, since both can take time to fully normalize even after symptoms improve.
Important context
Individual symptoms, reactions, medical histories, food products, and local labeling rules can vary. Community experiences are not medical evidence.
For personal medical decisions, diagnosis, testing, or treatment, consult a qualified healthcare professional.