ICD-10 Code for Preterm

The ICD-10-CM 2027 alphabetic index lists preterm with the subterms below. More specific codes depend on the details documented, as listed in the official index (11 codes, 10 billable).

Index entries for Preterm

delivery – O60.10 (header) – see also Pregnancy, complicated by, preterm labor
labor – see Pregnancy, complicated by, preterm labor
newborn (infant) – P07.30
- gestational age
  - 28 completed weeks (28 weeks, 0 days through 28 weeks, 6 days) – P07.31
  - 29 completed weeks (29 weeks, 0 days through 29 weeks, 6 days) – P07.32
  - 30 completed weeks (30 weeks, 0 days through 30 weeks, 6 days) – P07.33
  - 31 completed weeks (31 weeks, 0 days through 31 weeks, 6 days) – P07.34
  - 32 completed weeks (32 weeks, 0 days through 32 weeks, 6 days) – P07.35
  - 33 completed weeks (33 weeks, 0 days through 33 weeks, 6 days) – P07.36
  - 34 completed weeks (34 weeks, 0 days through 34 weeks, 6 days) – P07.37
  - 35 completed weeks (35 weeks, 0 days through 35 weeks, 6 days) – P07.38
  - 36 completed weeks (36 weeks, 0 days through 36 weeks, 6 days) – P07.39

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.