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ICD-10-CM 2027 diagnosis code

O70.4Anal sphincter tear complicating delivery, not associated with third degree laceration

✓ Billable / specificCC — complication/comorbidityMaternity · age 9–64Female only

O70.4 is a valid, billable ICD-10-CM code for anal sphincter tear complicating delivery, not associated with third degree laceration. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Anal sphincter tear comp del, not assoc w third degree lac

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O70.4

O70.4 is the ICD-10-CM diagnosis code for anal sphincter tear complicating delivery, not associated with third degree laceration. 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), O70.4 is specifically for anal sphincter tear complicating delivery, not associated with third degree laceration. Related codes cover first degree perineal laceration during delivery (O70.0), second degree perineal laceration during delivery (O70.1), third degree perineal laceration during delivery (O70.2), fourth degree perineal laceration during delivery (O70.3) and unspecified (O70.9).

Don't report O70.4 together with the conditions in its Excludes1 note: anal sphincter tear with third degree perineal laceration (O70.2-).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

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 664.61 (anal sphincter tear complicating delivery, not associated with third-degree perineal laceration, delivered, with or without mention of antepartum condition) and 664.64 (anal sphincter tear complicating delivery, not associated with third-degree perineal laceration, postpartum condition or complication).

Coding notes

Excludes1Not coded here — never report together with this code
  • anal sphincter tear with third degree perineal laceration (O70.2-)

Notes that apply from higher levels

Instructions written at a parent level also apply to O70.4.

› From O70 Perineal laceration during delivery
Includes
  • episiotomy extended by laceration
Excludes1
  • obstetric high vaginal laceration alone (O71.4)

Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to O70.4.

Codes whose notes reference O70.4

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 14 · Pregnancy, Childbirth and the Puerperium

MDC 14 · Pregnancy, Childbirth and the Puerperium

ICD-9-CM equivalent

Converter →
  • 664.61Anal sphincter tear complicating delivery, not associated with third-degree perineal laceration, delivered, with or without mention of antepartum conditionapproximate
  • 664.64Anal sphincter tear complicating delivery, not associated with third-degree perineal laceration, postpartum condition or complicationapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about O70.4

Is O70.4 billable?

Yes. O70.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can O70.4 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict O70.4 as a principal diagnosis.

Is O70.4 a CC or MCC?

O70.4 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does O70.4 group to?

O70.4 is used in the MS-DRG v44.0 logic for MS-DRG 769 (Postpartum and Post Abortion Diagnoses with O.R. Procedures) and MS-DRG 776 (Postpartum and Post Abortion Diagnoses without O.R. Procedures). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for O70.4?

The CMS General Equivalence Mappings map O70.4 to ICD-9-CM 664.61 and 664.64.