0| Icd-9 | Icd-10 |
| 3-5 characters in length | 3-7 characters in length |
| Approximately 13,000 codes | Approximately 68,000 available codes |
| First digit may be alpha (E or V) or numeric | Digit 1 is alpha; digits 2 and 3 are numeric; digits 2-5 are numeric digits 4-7 are alpha or numeric |
| Lacks laterality | Has laterality (i.e., codes identifying right vs left) |
ICD-9 CM:
1 001-139 Infectious And Parasitic Diseases
2 140-239 Neoplasms
3 240-279 Endocrine, Nutritional And Metabolic Diseases, And Immunity Disorders
4 280-289 Diseases Of The Blood And Blood-Forming Organs
5 290-319 Mental Disorders
6 320-389 Diseases Of The Nervous System And Sense Organs
7 390-459 Diseases Of The Circulatory System
8 460-519 Diseases Of The Respiratory System
9 520-579 Diseases Of The Digestive System
10 580-629 Diseases Of The Genitourinary System
11 630-679 Complications Of Pregnancy, Childbirth, And The Puerperium
12 680-709 Diseases Of The Skin And Subcutaneous Tissue
13 710-739 Diseases Of The Musculoskeletal System And Connective Tissue
14 740-759 Congenital Anomalies
15 760-779 Certain Conditions Originating In The Perinatal Period
16 780-799 Symptoms, Signs, And Ill-Defined Conditions
17 800-999 Injury And Poisoning
18 V01-V91 Supplementary Classification Of Factors Influencing Health Status And Contact With Health Services
19 E000-E999 Supplementary Classification Of External Causes Of Injury And Poisoning
ICD-10 CM:
1 A00-B99 Certain infectious and parasitic diseases
2 C00-D49 Neoplasms
3 D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
4 E00-E89 Endocrine, nutritional and metabolic diseases
5 F01-F99 Mental, Behavioral and Neurodevelopmental disorders
6 G00-G99 Diseases of the nervous system
7 H00-H59 Diseases of the eye and adnexa
8 H60-H95 Diseases of the ear and mastoid process
9 I00-I99 Diseases of the circulatory system
10 J00-J99 Diseases of the respiratory system
11 K00-K95 Diseases of the digestive system
12 L00-L99 Diseases of the skin and subcutaneous tissue
13 M00-M99 Diseases of the musculoskeletal system and connective tissue
14 N00-N99 Diseases of the genitourinary system
15 O00-O9A Pregnancy, childbirth and the puerperium
16 P00-P96 Certain conditions originating in the perinatal period
17 Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
18 R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
19 S00-T88 Injury, poisoning and certain other consequences of external causes
20 V00-Y99 External causes of morbidity
21 Z00-Z99 Factors influencing health status and contact with health services.
ICD-10 Code Structure:
Characters 1-3 – Category.
Characters 4-6 – Etiology, anatomic site, severity, or other clinical detail.
Characters 7 – Extension.
