Non-Billable / Non-Specific Code
ICD-10-CM O99.1 is the diagnosis code for Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium. This code falls under the section "Other obstetric conditions, not elsewhere classified" within Chapter 15 — Pregnancy, childbirth and the puerperium (O00-O9A). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as O99.1. They are mutually exclusive:
Understanding where O99.1 sits in the ICD-10-CM classification helps ensure proper coding:
No, O99.1 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
O99.1 is the ICD-10-CM diagnosis code for "Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of O99.1 is O99 ("Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium"). O99.1 provides a more specific classification within this category.
O99.1 is located in Section O94-O9A — "Other obstetric conditions, not elsewhere classified" within Chapter 15 of the ICD-10-CM Tabular List.
O99.1 has 3 sub-code(s) that provide more specific detail: O99.11, O99.12, O99.13.
Use O99.1 when the patients documented diagnosis matches "Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM 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.
No, O99.1 is non-billable. Use a more specific sub-code for primary diagnosis billing.
O99.1 is in Chapter 15 of the ICD-10-CM Tabular List.
Type 1 Excludes for O99.1 include: hemorrhage with coagulation defects (O45.-, O46.0-, O67.0, O72.3).
Yes, O99.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.