ICD-10 Code for Development

The ICD-10-CM 2027 alphabetic index lists development with the subterms below. More specific codes depend on the details documented, as listed in the official index (22 codes, 22 billable).

Index entries for Development

abnormal, bone – Q79.9
arrested – R62.50
- bone – see Arrest, development or growth, bone
- child – R62.50
- due to malnutrition – E45
defective, congenital – see also Anomaly, by site
- cauda equina – Q06.3
- left ventricle – Q24.8
  - in hypoplastic left heart syndrome – Q23.4
- valve – Q24.8
  - pulmonary – Q22.3
delayed – R62.50 – see also Delay, development
- arithmetical skills – F81.2
- language (skills) (expressive) – F80.1
- learning skill – F81.9
- mixed skills – F88
- motor coordination – F82
- reading – F81.0
- specified learning skill NEC – F81.89
- speech – F80.9
- spelling – F81.81
- written expression – F81.81
imperfect, congenital – see also Anomaly, by site
- heart – Q24.9
- lungs – Q33.6
incomplete
- bronchial tree – Q32.4
- organ or site not listed – see Hypoplasia, by site
- respiratory system – Q34.9
sexual, precocious NEC – E30.1
tardy, mental – F79 – see also Disability, intellectual

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.