O99 ICD-10-CM Code: Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
O99Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
ICD-10-CM diagnosis code · United States clinical modification
Where O99 sits
- 1
Chapter 15
Pregnancy, childbirth and the puerperium (O00-O9A)
- 2
Section
Other obstetric conditions, not elsewhere classified (O94-O9A)
- 3
Category O99
Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
- 4
Code O99
Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
Codes under O99
O99 is a non-billable category. Choose the child code that best matches the documented diagnosis.
O99.0Anemia complicating pregnancy, childbirth and the puerperiumO99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumO99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumO99.3Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperiumO99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperiumO99.5Diseases of the respiratory system complicating pregnancy, childbirth and the puerperiumO99.6Diseases of the digestive system complicating pregnancy, childbirth and the puerperiumO99.7Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperiumO99.8Other specified diseases and conditions complicating pregnancy, childbirth and the puerperiumNotes for this code
Inclusion terms
No inclusion terms are listed for O99.
Code first
No “code first” instruction is listed for O99.
Use additional code
- code to identify specific condition
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for O99.
Excludes2
Conditions not included here that may be reported separately when present.
- when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code O99 mean?
O99 is the FY 2027 U.S. ICD-10-CM code for “Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium.”
Is O99 a billable or specific ICD-10-CM code?
No. O99 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is O99 located in ICD-10-CM?
O99 is listed in Chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A), within Other obstetric conditions, not elsewhere classified (O94-O9A) (O94–O9A), under category O99, Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium.
What coding notes are listed for O99?
No inclusion terms are listed for O99 in this reference record. No code-first instruction is listed. Additional-code instructions: code to identify specific condition. No Excludes1 note is listed. Excludes2 notes: when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36).