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Alphabetic Index FY2027

Chapter 22

Chapter 22

U00–U85

Codes for special purposes

FY2027

Blocks in this chapter 1

U00–U49Provisional assignment of new diseases of uncertain etiology or emergency use

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1 Certain infectious and parasitic diseases
2 Neoplasms
3 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
4 Endocrine, nutritional and metabolic diseases
5 Mental, Behavioral and Neurodevelopmental disorders
6 Diseases of the nervous system
7 Diseases of the eye and adnexa
8 Diseases of the ear and mastoid process
9 Diseases of the circulatory system
10 Diseases of the respiratory system
11 Diseases of the digestive system
12 Diseases of the skin and subcutaneous tissue
13 Diseases of the musculoskeletal system and connective tissue
14 Diseases of the genitourinary system
15 Pregnancy, childbirth and the puerperium
16 Certain conditions originating in the perinatal period
17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
19 Injury, poisoning and certain other consequences of external causes
20 External causes of morbidity
21 Factors influencing health status and contact with health services
22 Codes for special purposes1 below
- U00–U49 Provisional assignment of new diseases of uncertain etiology or emergency use

Fiscal year

You are viewing FY2027. Always code with the year that matches the date of service or discharge.

FY2027 Effective October 1, 2026

Source: CMS / NCHS, ICD-10-CM fiscal year 2027 (effective October 1, 2026). ICD-10-CM is in the public domain.

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