Localized swelling, mass and lump, head. 2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code. R22.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2022 edition of ICD-10-CM R22.0 became effective on October 1, 2021.