O99Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use O99 directly
Use the most specific code supported by the record.
- Chapter XV
- Pregnancy, childbirth and the puerperium
- Group O94-O99
- Other obstetric conditions, not elsewhere classified
- Official Vietnamese name
- Bệnh thai sản khác phân loại mục khác có gây biến chứng cho thai kỳ, sinh đẻ và/hoặc thời kỳ sau đẻ
- Additional WHO coding guidance
- Note: This category includes conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care and for which the Alphabetical Index does not indicate a specific rubric in Chapter XV. Use additional code, if desired, to identify specific condition. Excl.: infectious and parasitic diseases (O98.-) injury, poisoning and certain other consequences of external causes (S00- T98) when the reason for maternal care is that the condition is known or suspected to have
Related O99 codes
O99.0
Primary diagnosis candidate
Anaemia complicating pregnancy, childbirth and the puerperium
O99.1
Primary diagnosis candidate
Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium
O99.2
Primary diagnosis candidate
Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium
O99.3
Primary diagnosis candidate
Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium
O99.4
Primary diagnosis candidate
Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium
O99.5
Primary diagnosis candidate
Diseases of the respiratory system complicating pregnancy, childbirth and the puerperium
O99.6
Primary diagnosis candidate
Diseases of the digestive system complicating pregnancy, childbirth and the puerperium
O99.7
Primary diagnosis candidate
Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium
O99.8
Primary diagnosis candidate
Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
