ICD-10-CM 2027 diagnosis code

O99.6Diseases of the digestive system complicating pregnancy, childbirth and the puerperium

Not billable — use a more specific code

O99.6 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.Short description: Diseases of the digestive system compl preg/chldbrth

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 O99.6

O99.6 is the ICD-10-CM diagnosis code for diseases of the digestive system complicating pregnancy, childbirth and the puerperium. It belongs to category O99 (other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), block O94-O9A (other obstetric conditions, not elsewhere classified) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within O99 (other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), O99.6 is specifically for diseases of the digestive system complicating pregnancy, childbirth and the puerperium. Related codes cover anemia complicating pregnancy, childbirth and the puerperium (O99.0), other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium (O99.1), endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium (O99.2), mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium (O99.3), diseases of the circulatory system complicating pregnancy, childbirth and the puerperium (O99.4), diseases of the respiratory system complicating pregnancy, childbirth and the puerperium (O99.5), diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium (O99.7) and other specified diseases and conditions complicating pregnancy, childbirth and the puerperium (O99.8).

To report this condition, pick the subcode that matches the documentation: O99.61 (pregnancy), O99.62 (childbirth) and O99.63 (puerperium).

The conditions in its Excludes2 note aren't part of O99.6, but may be coded alongside it if the patient has both: hemorrhoids in pregnancy (O22.4-) and liver and biliary tract disorders in pregnancy, childbirth and the puerperium (O26.6-).

Use an additional code to identify specific condition.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under O99.6

Coding notes

Applicable toConditions and synonyms classified to this code

Conditions in K00-K93

Excludes2Not included here — may be reported together if both conditions exist

hemorrhoids in pregnancy (O22.4-)
liver and biliary tract disorders in pregnancy, childbirth and the puerperium (O26.6-)

Notes that apply from higher levels

Instructions written at a parent level also apply to O99.6.

› From O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Includes

conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

Excludes2

when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Use additional code

code to identify specific condition

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

Code history

2016
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2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about O99.6

Is O99.6 billable?: No. O99.6 is a header code. Report one of its more specific subcodes instead.