Question: what is unique about hcpcs codes that begin with the letter t
[{'answer': 'State Medicaid Agency Codes', 'provenance': [{'wikipedia_id': '31999673', 'title': 'HCPCS Level 2', 'start_paragraph_id': 19, 'start_character': 33, 'end_paragraph_id': 19, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::Types of Level II codes.\n'}]}]