ICD-10-CM Code Reference

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ICD-10-CM Chapters

Browse all 21 chapters of the International Classification of Diseases, 10th Revision, Clinical Modification.

Chapter 1
Certain Infectious and Parasitic Diseases
A00-B99
Chapter 2
Neoplasms
C00-D49
Chapter 3
Diseases of the Blood and Blood-Forming Organs
D50-D89
Chapter 4
Endocrine, Nutritional and Metabolic Diseases (12 codes)
E00-E89
Chapter 5
Mental, Behavioral and Neurodevelopmental Disorders
F01-F99
Chapter 6
Diseases of the Nervous System
G00-G99
Chapter 7
Diseases of the Eye and Adnexa
H00-H59
Chapter 8
Diseases of the Ear and Mastoid Process
H60-H95
Chapter 9
Diseases of the Circulatory System (11 codes)
I00-I99
Chapter 10
Diseases of the Respiratory System (9 codes)
J00-J99
Chapter 11
Diseases of the Digestive System
K00-K95
Chapter 12
Diseases of the Skin and Subcutaneous Tissue
L00-L99
Chapter 13
Diseases of the Musculoskeletal System and Connective Tissue (11 codes)
M00-M99
Chapter 14
Diseases of the Genitourinary System
N00-N99
Chapter 15
Pregnancy, Childbirth and the Puerperium
O00-O9A
Chapter 16
Certain Conditions Originating in the Perinatal Period
P00-P96
Chapter 17
Congenital Malformations, Deformations and Chromosomal Abnormalities
Q00-Q99
Chapter 18
Symptoms, Signs and Abnormal Clinical and Laboratory Findings
R00-R99
Chapter 19
Injury, Poisoning and Certain Other Consequences of External Causes (5 codes)
S00-T88
Chapter 20
External Causes of Morbidity
V00-Y99
Chapter 21
Factors Influencing Health Status and Contact with Health Services
Z00-Z99