664: Trauma to perineum and vulva during delivery
Requires fifth digit; valid digits are in [brackets] under each code. see beginning of section 660-669 for definitions.
Includes:
damage from instruments
that from extension of episiotomy
664.1 Second-degree perineal laceration
[0,1,4]
Perineal laceration, rupture, or tear (following episiotomy) involving:
pelvic floor
perineal muscles
vaginal muscles
Excludes:
that involving anal sphincter (664.2)

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