O70.21
Billable codeThird degree perineal laceration during delivery, IIIa
The ICD-10 code for third degree perineal laceration during delivery, iiia is O70.21.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Third degree perineal laceration during delivery with less than 50% of external anal sphincter (EAS) thickness torn
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- O70.20Third degree perineal laceration during delivery, unspecified
- O70.22Third degree perineal laceration during delivery, IIIb
- O70.23Third degree perineal laceration during delivery, IIIc
- O70.21Third degree perineal laceration during delivery, IIIa
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 66421Approximate match
- 66424Approximate match
- 66420Approximate match
Associated MS-DRGs
O70.21 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.