O99

Non-Billable
ChapterO00–O9A
Rankcategory
Official Description

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

Metadata & Insights
  • Non-billable category (requires more specific sub-code).
  • Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A).

CH15 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • supervision of normal pregnancy (Z34.-)
Excludes2(Not included here. Code separately if applicable.)
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)
Use Additional Code
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Instructional Notes

Includes
  • conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care
Excludes2(Not included here. Code separately if applicable.)
  • 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

Clinical Hierarchy

BillableHas subcodes
CH15Pregnancy, childbirth and the puerperium (O00-O9A)
O94-O9AOther obstetric conditions, not elsewhere classified (O94-O9A)
O99Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperiumNot billable
O99.0Anemia complicating pregnancy, childbirth and the puerperiumSubcodes
O99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumSubcodes
O99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumSubcodes
O99.3Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperiumSubcodes
O99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperiumSubcodes
O99.5Diseases of the respiratory system complicating pregnancy, childbirth and the puerperiumSubcodes
O99.6Diseases of the digestive system complicating pregnancy, childbirth and the puerperiumSubcodes
O99.7Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperiumSubcodes
O99.8Other specified diseases and conditions complicating pregnancy, childbirth and the puerperiumSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to O99:

chapterCH15
Pregnancy, childbirth and the puerperium (O00-O9A)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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