ICD-10-CM 2027
ICD-10 code for weight
Choose a code from the options below based on the documentation.
From the official ICD-10-CM alphabetic index entry “Weight”. Page updated September 29, 2026.
About coding weight
The official ICD-10-CM index doesn't give a single default code for weight; the code depends on the details below.
More specific weight codes (official index)
- 1000-2499 grams at birth (low)
- 999 grams or less at birth (extremely low)
- and length below 10th percentile for gestational age P05.1 — Newborn small for gestational age
- below but length above 10th percentile for gestational age P05.0 — Newborn light for gestational age
- gain (abnormal) (excessive) R63.5 — Abnormal weight gain
- in pregnancy
- low
- loss (abnormal) (cause unknown) R63.4 — Abnormal weight loss