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O70.21

Third degree perineal laceration during delivery, IIIa

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 8 never code together
O70code
Excludes1
  • obstetric high vaginal laceration alone (O71.4)O71.4
O70.2code
Excludes1
  • anal sphincter tear during delivery without third degree perineal laceration (O70.4)O70.4
  • perineal laceration involving anal or rectal mucosa (O70.3)O70.3
O00-O9Achapter
Excludes1
  • supervision of normal pregnancy (Z34.-)Z34.-
Excludes2
  • mental and behavioral disorders associated with the puerperium (F53.-)F53.-
  • obstetrical tetanus (A34)A34
  • postpartum necrosis of pituitary gland (E23.0)E23.0
  • puerperal osteomalacia (M83.0)M83.0

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 12
O70.2code
Inclusion terms
  • Perineal laceration, rupture or tear during delivery as in O70.1, also involving anal sphincterO70.1
  • Perineal laceration, rupture or tear during delivery as in O70.1, also involving rectovaginal septumO70.1
  • Perineal laceration, rupture or tear during delivery as in O70.1, also involving sphincter NOSO70.1
O70.21code
Inclusion terms
  • Third degree perineal laceration during delivery with less than 50% of external anal sphincter (EAS) thickness torn
O70code
Includes
  • episiotomy extended by laceration
O00-O9Achapter
Notes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery
Use additional code
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.Z3A
Index entries leading here 1
  • Delivery (childbirth) (labor)
    • complicated O75.9
      • by
        • laceration (perineal) O70.9
          • perineum, perineal O70.9
            • third degree O70.20
              • with
                • less than 50% of external anal sphincter (EAS) thickness torn (IIIa) O70.21
              • IIIa O70.21
Alongside this code 3 same parent — O70.2
O70.20 Third degree perineal laceration during delivery, unsp O70.22 Third degree perineal laceration during delivery, IIIb O70.23 Third degree perineal laceration during delivery, IIIc
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
O70.2
Block
O60-O77
Siblings
3

Present FY2024–FY2027.