2027 ICD-10-CM Diagnosis Code Q18.8Other specified congenital malformations of face and neck
ICD-10-CM Codes›Q00-Q99›Q10-Q18›Q18
- Billable — Valid for Submission
- POA Exempt
- Chronic Condition
Q18.8 is a billable ICD-10-CM diagnosis code for other specified congenital malformations of face and neck. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 154 through 156. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Congenital malformations of eye, ear, face, neck.
Code Identity
Code Classification
Present on Admission (POA)Billing
Q18.8 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Congenital malformations of eye, ear, face and neck (Q10-Q18).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Absent eyebrow
- Agenesis of hyoid bone
- Alport syndrome, intellectual disability, midface hypoplasia, elliptocytosis syndrome
- Branchial dysplasia, intellectual disability, inguinal hernia syndrome
- Branchiooculofacial syndrome
- Cognitive impairment, coarse facies, heart defects, obesity, pulmonary involvement, short stature, skeletal dysplasia syndrome
- Congenital abnormal shape of hyoid bone
- Congenital absence of chin
- Congenital absence of hyoid bone
- Congenital anomaly of hyoid bone
- Congenital bent hyoid bone
- Congenital contracture of limbs and face, hypotonia, developmental delay syndrome
- Congenital hypoplasia of eyebrow
- Congenital hypoplasia of middle third of face
- Congenital infiltrating lipomatosis of face
- Congenital malformation of the eyebrow
- Congenital nephritis
- Developmental malformation of branchial arch
- DNMT3A-related overgrowth syndrome
- Double eyebrow
- Duplication of eyebrow and syndactyly syndrome
- Dyssegmental dysplasia Silverman Handmaker type
- Fistula colli congenita
- Genetic syndromic childhood obesity
- Hemifacial hyperplasia
- Hemifacial hyperplasia strabismus syndrome
- Hemifacial myohyperplasia
- Hereditary elliptocytosis
- Hypertelorism
- Hypertelorism with microtia and facial clefting syndrome
- Isolated asymmetric crying facies
- Jugular lymphatic obstruction sequence
- KBG syndrome
- Microphthalmos due to branchio-oculo-facial syndrome
- Microtia
- Partial duplication of eyebrow
- Synophrys
- Wiedemann Steiner syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Q18.8: its own notes plus those printed at Q18, block Q10-Q18, and Chapter 17. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Medial cyst of face and neck
- Medial fistula of face and neck
- Medial sinus of face and neck
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- cleft lip and cleft palate (Q35-Q37)
- congenital malformation of cervical spine (Q05.0, Q05.5, Q67.5, Q76.0-Q76.4)
- congenital malformation of larynx (Q31.-)
- congenital malformation of lip NEC (Q38.0)
- congenital malformation of nose (Q30.-)
- congenital malformation of parathyroid gland (Q89.2)
- congenital malformation of thyroid gland (Q89.2)
Notes
General instructions on how these codes are used.
- Codes from this chapter are not for use on maternal records
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name Q18.8, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Absence (of) (organ or part) (complete or partial)
chin, congenital Q18.8
face, specified part NEC Q18.8
neck, part Q18.8
chin Q18.8
specified part NEC Q18.8
neck, part Q18.8
lip (congenital) Q18.8
face Q18.8
Sinus See Also: Fistula;
medial, face and neck Q18.8
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Craniofacial Abnormalities
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.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert Q18.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Q18.8Overview
What is the ICD-10 code for other specified congenital malformations of face and neck?
The ICD-10-CM code for other specified congenital malformations of face and neck is Q18.8 (sometimes written as Q188). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is Q18.8 (Other congenital malformations of face and neck) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified congenital malformations of face and neck on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Q18.8 group to?
When other specified congenital malformations of face and neck is the principal diagnosis on an inpatient stay, it groups to MS-DRG 156, 155, 154, with relative weights from 0.6656 to 1.5916 depending on complications. Higher weights mean higher Medicare reimbursement.
Is Q18.8 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for other specified congenital malformations of face and neck on inpatient claims. The code appears in the Congenital malformations of eye, ear, face and neck (Q10-Q18) range of the CMS exempt list.
Can Q18.8 be reported with a code from Q75?
Not as a rule. The Excludes1 note at Q18, which applies to Q18.8, lists "congenital malformations of skull and face bones (Q75.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
