Category 1
A Codes
Transportation Services Including Ambulance, Medical & Surgical Supplies
(V00-Y99)
Chapter 20 - External Causes of Morbidity
(D50–D89)
Chapter 3 Diseases of the Blood and Blood-Forming Organs and Certain Disorders Involving the Immune Mechanism
(S00–T88)
Chapter 19 - Injury, Poisoning, and Certain Other Consequences of External Causes
(R00–R99)
Chapter 18 - Symptoms, Signs, and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified
(Z00–Z99)
Chapter 21 - Factors Influencing Health Status and Contact with Health Services
(S00-T88)
Chapter 19 - Injury, Poisoning, and Certain Other Consequences of External Causes
(Q00–Q99)
Chapter 17 - Congenital Malformations, Deformations, and Chromosomal Abnormalities
(E00–E89)
Chapter 4 Endocrine, Nutritional, and Metabolic Diseases
(I00–I99)
Chapter 9 Diseases of the Circulatory System
(H00-H59)
Chapter 7 - Diseases of the Eye and Adnexa
(I00–I99)
Chapter 9 - Diseases of the Circulatory System
C Codes
Temporary Codes For Use with Outpatient Prospective Payment System
(P00–P96)
Chapter 16 - Certain Conditions Originating in the Perinatal Period
(L00–L99)
Chapter 12 - Diseases of the Skin and Subcutaneous Tissue
(G00–G99)
Chapter 6 - Diseases of the Nervous System
(P00–P96)
Chapter 16 - Certain Conditions Originating in the Perinatal Period
(C00–D49)
Chapter 2 - Neoplasms
(H60–H95)
Chapter 8 Diseases of the Ear and Mastoid Process
(F01–F99)
Chapter 5 Mental, Behavioral and Neurodevelopmental Disorders
(N00–N99)
Chapter 14 - Diseases of the Genitourinary System
(H00-H59)
Chapter 7 Diseases of the Eye and Adnexa
(O00–O9A)
Chapter 15 - Pregnancy, Childbirth, and the Puerperium
(M00–M99)
Chapter 13 - Diseases of the Musculoskeletal System and Connective Tissue
B Codes
Enteral And Parenteral Therapy