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ICD-10-CM · FY 2026 APRIL UPDATE

O99

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

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
O99.0Anemia complicating pregnancy, childbirth and the puerperiumCategory
O99.01Anemia complicating pregnancyCategory
O99.011Anemia complicating pregnancy, first trimesterBillable
O99.012Anemia complicating pregnancy, second trimesterBillable
O99.013Anemia complicating pregnancy, third trimesterBillable
O99.019Anemia complicating pregnancy, unspecified trimesterBillable
O99.02Anemia complicating childbirthBillable
O99.03Anemia complicating the puerperiumBillable
O99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumCategory
O99.11Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancyCategory
O99.111Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, first trimesterBillable
O99.112Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, second trimesterBillable
O99.113Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, third trimesterBillable
O99.119Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, unspecified trimesterBillable
O99.12Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirthBillable
O99.13Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating the puerperiumBillable
O99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumCategory
O99.21Obesity complicating pregnancy, childbirth, and the puerperiumCategory
O99.210Obesity complicating pregnancy, unspecified trimesterBillable
O99.211Obesity complicating pregnancy, first trimesterBillable
O99.212Obesity complicating pregnancy, second trimesterBillable
O99.213Obesity complicating pregnancy, third trimesterBillable
O99.214Obesity complicating childbirthBillable
O99.215Obesity complicating the puerperiumBillable
O99.28Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumCategory
O99.280Endocrine, nutritional and metabolic diseases complicating pregnancy, unspecified trimesterBillable
O99.281Endocrine, nutritional and metabolic diseases complicating pregnancy, first trimesterBillable
O99.282Endocrine, nutritional and metabolic diseases complicating pregnancy, second trimesterBillable
O99.283Endocrine, nutritional and metabolic diseases complicating pregnancy, third trimesterBillable
O99.284Endocrine, nutritional and metabolic diseases complicating childbirthBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.