Q17.8
Other specified congenital malformations of ear
Q17.8 (also written Q178) is a billable ICD-10-CM diagnosis code for other specified congenital malformations of ear. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 8 codes in category Q17 (Other congenital malformations of ear). The Alphabetic Index lists it under 22 entries. Its coding notes include 2 Excludes1 entries and 8 Excludes2 entries.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- 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)
- inborn errors of metabolism (E70-E88)
Inclusion terms
Conditions classified to this code.
- Congenital absence of lobe of ear
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 22 entries
- Abnormal, abnormality, abnormalities, course, eustachian tube
- Absence (of) (organ or part) (complete or partial), ear, congenital, lobe, lobule
- Agenesis, ear, lobe
- Anomaly, anomalous (congenital) (unspecified type), auditory canal
- Anomaly, anomalous (congenital) (unspecified type), auricle, ear
- Anomaly, anomalous (congenital) (unspecified type), eustachian tube
- Atresia, atretic, eustachian tube
- Darwin's tubercle
- Deformity, eustachian tube (congenital) NEC
- Dilatation, eustachian tube, congenital
- Distortion (s) (congenital), eustachian tube
- Double, auditory canal
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- Fissure, fissured, ear, lobule, congenital
- Hypoplasia, hypoplastic, auditory canal
- Hypoplasia, hypoplastic, eustachian tube
- Hypoplasia, hypoplastic, osseous meatus (ear)
- Malformation (congenital), ear, external, specified type NEC
- Malformation (congenital), ear, specified type NEC
- Malposition, congenital, auditory canal
- Malposition, congenital, eustachian tube
- Stricture, eustachian tube, congenital
- Tubercle, Darwin's