O99.1
Header — not billableOther diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium
The ICD-10 code for other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium is O99.1.
O99.1 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under O99.1
- O99.11Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancynon-billable header
- O99.12Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirth
- O99.13Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating the puerperium
Related codes in this category
- O99.0Anemia complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.3Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.5Diseases of the respiratory system complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.6Diseases of the digestive system complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.7Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.8Other specified diseases and conditions complicating pregnancy, childbirth and the puerperiumnon-billable header
- O99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumnon-billable header