O70.21 Third degree perineal laceration during delivery, IIIa

The ICD-10-CM code for Third degree perineal laceration during delivery, IIIa is O70.21 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

15: Pregnancy, childbirth and the puerperium (O00-O9A)

Section

O60-O77: Complications of labor and delivery (O60-O77)

Category O70

11 codes (9 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O70.21:

• Delivery (childbirth) (labor) › complicated › by › laceration (perineal) › perineum, perineal › third degree › IIIa
• Delivery (childbirth) (labor) › complicated › by › laceration (perineal) › perineum, perineal › third degree › with › less than 50% of external anal sphincter (EAS) thickness torn (IIIa)

Inclusion Terms

• Third degree perineal laceration during delivery with less than 50% of external anal sphincter (EAS) thickness torn

U.S. Hospital Utilization

• An estimated 13,715 U.S. inpatient stays in 2023 included O70.21 among the documented diagnoses.
• 875 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference O70.21 with the canonical source and edition:

O70.21 — Third degree perineal laceration during delivery, IIIa. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/O70.21

Canonical URL: https://icd10codingpro.com/codes/O70.21