Q18.4 is a billable ICD-10 code used to specify a medical diagnosis of macrostomia. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Ablepharon macrostomia syndrome
- Bilateral congenital macrostomia
- Congenital left sided macrostomia
- Congenital macrostomia
- Congenital macrostomia
- Congenital right sided macrostomia
- Macrostomia, preauricular tag, external ophthalmoplegia syndrome
- Mandibulofacial dysostosis, macroblepharon, macrostomia syndrome
- Mass of preauricular region
- Sphenoidal dysostosis
- Macrostomia-. greatly exaggerated width of the mouth, resulting from failure of union of the maxillary and mandibular processes, with extension of the oral orifice toward the ear. the defect may be unilateral or bilateral. (dorland, 27th ed)
- Hypertelorism-. abnormal increase in the interorbital distance due to overdevelopment of the lesser wings of the sphenoid.
Index to Diseases and Injuries References
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:
- - Macrostomia (congenital) - Q18.4
- - Meloschisis - Q18.4
Present on Admission (POA)
Convert to ICD-9 Code
|Source ICD-10 Code||Target ICD-9 Code|
|Q18.4||744.83 - Macrostomia|
Craniofacial is a medical term that relates to the bones of the skull and face. Craniofacial abnormalities are birth defects of the face or head. Some, like cleft lip and palate, are among the most common of all birth defects. Others are very rare. Most of them affect how a person's face or head looks. These conditions may also affect other parts of the body.
Treatment depends on the type of problem. Plastic and reconstructive surgery may help the person's appearance.
[Learn More in MedlinePlus]
- FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
- FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)