O99.891 Other specified diseases and conditions complicating pregnancy

The ICD-10-CM code for Other specified diseases and conditions complicating pregnancy is O99.891 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

15: Pregnancy, childbirth and the puerperium (O00-O9A)

Section

O94-O9A: Other obstetric conditions, not elsewhere classified (O94-O9A)

Category O99

124 codes (96 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O99.891:

• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › musculoskeletal condition (conditions is M00-M99)
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › peritoneal (pelvic) adhesions
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › pelvic inflammatory disease
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › connective system disorders (conditions in M00-M99)
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › disorders of › specified NEC
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › disorders of › ear and mastoid process (conditions in H60-H95)
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › diseases of › specified NEC
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › disorders of › eye and adnexa (conditions in H00-H59)

U.S. Hospital Utilization

• An estimated 28,875 U.S. inpatient stays in 2023 included O99.891 among the documented diagnoses.
• 5,485 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

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O99.891 — Other specified diseases and conditions complicating pregnancy. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/O99.891

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