Question: The podiatrist diagnosed the patient with inherited keratosis palmaris et plantaris on his feet. Which diagnosis code should we report? Illinois Subscriber Answer: Inherited keratosis palmaris et plantaris is a covered condition under code Q82.8 (Other specified congenital malformations of skin), according to the ICD-10 manual. So, you should report Q82.8. Other conditions covered under Q82.8 include the following: