The instruction "code first underlying disease" (or similar wording) appears below a manifestation code that must NOT be used as a first-listed code. These codes are for symptoms only, never for causes. …

Jun 16, 2021 · Do not report a manifestation code as a first-listed or principal diagnosis. Code the underlying disease first. Manifestation codes are backed by blue highlights in the ICD-10-CM …

“In diseases classified elsewhere” codes are not to be used as first-listed or principal diagnosis code. They must be used in conjunction with an underlying condition code, following the underlying …

ICD-10 coding rules for Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis (PDx)..

Aug 12, 2025 · A manifestation code describes the sign or symptom of an underlying disease or condition. It is not the primary diagnosis but rather a secondary code that explains the clinical …

Oct 1, 2020 · This convention instructs you to “Code first” the underlying condition, followed by etiology and/or manifestations. Appears in the Official Guidelines at I.A.13.

Jan 1, 2024 · According to the ICD Manual coding guidelines, the primary, first listed, or principal diagnosis cannot be a manifestation code. In addition, based on this guideline, a manifestation code …

Apr 1, 2022 · 'In diseases classified elsewhere' codes are never permitted to be used as first listed or principal diagnosis codes. They must be used in conjunction with an underlying condition code and …

Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis. The following 422 ICD-10-CM codes are …

"In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must …