Diagnosis Code Selection
Frequently, patient documentation will state, “Patient has a history of _______.” However, in ICD-10-CM diagnosis coding for pregnancy, the code selection is completely different if the patient’s condition is in the current pregnancy, or if it pre-dated the current pregnancy.
For example, the patient who is has a history of chronic hypertension and who is not pregnant would be reported with I10. The patient who is pregnant with a history of chronic hypertension would be reported with O10.01-. Similarly, if a non-pregnant patient has a urinary tract infection (UTI), the diagnosis code is N39.0. If a pregnant patient has a UTI, the correct diagnosis is O23.4-. If the patient does not currently has a UTI but report a history of UTI, the correct diagnosis is Z87.440.