O70.0First degree perineal laceration during delivery

O70.0 is the ICD-10-CM diagnosis code for first degree perineal laceration during delivery. It belongs to category O70 (perineal laceration during delivery), block O60-O77 (complications of labor and delivery) and chapter 15 (pregnancy, childbirth and the puerperium). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within O70 (perineal laceration during delivery), O70.0 is specifically for first degree perineal laceration during delivery. Related codes cover second degree perineal laceration during delivery (O70.1), third degree perineal laceration during delivery (O70.2), fourth degree perineal laceration during delivery (O70.3), anal sphincter tear complicating delivery, not associated with third degree laceration (O70.4) and unspecified (O70.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 769 (Postpartum and Post Abortion Diagnoses with O.R. Procedures, relative weight 1.6673) and DRG 776 (Postpartum and Post Abortion Diagnoses without O.R. Procedures, relative weight 0.6721), in MDC 14 (Pregnancy, Childbirth and the Puerperium), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

The Medicare Code Editor treats this as a maternity diagnosis, expected only for patients age 9 through 64.

It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 664.01 (First-degree perineal laceration, delivered, with or without mention of antepartum condition) and 664.04 (First-degree perineal laceration, postpartum condition or complication).