AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2014 Issue 3; Ask the Editor

Category Z3A, Weeks of Gestation

In ICD-10-CM’s Tabular List, Chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A), there is an instructional note that states “Use additional code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy.” This note applies to all of the codes in the obstetric chapter. However, this information may not be documented or relevant in cases of molar pregnancy or trophoblastic disease, since these are not viable pregnancies, and it is not possible for a normal baby to form. The Official Guidelines for Coding and Reporting 2014, page 92, states, “Codes in category Z3A, Weeks of gestation, may be assigned to provide additional information about the pregnancy.” Is it appropriate to assign code Z3A.00 Weeks of gestation of pregnancy, not specified, for these cases? ...

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