Q12 – Congenital lens malformations

ICD-10-CM 2027 diagnosis code · Congenital malformations of eye, ear, face and neck

Non-billable header

ICD-10-CM code Q12

Code: Q12 (claims format: Q12)
Description: Congenital lens malformations
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
Block: Q10-Q18 Congenital malformations of eye, ear, face and neck

Billable codes under Q12

Q12 is a header code and cannot be used on claims. Choose the most specific code:

Q12.0 – Congenital cataractBillable
Q12.1 – Congenital displaced lensBillable
Q12.2 – Coloboma of lensBillable
Q12.3 – Congenital aphakiaBillable
Q12.4 – SpherophakiaBillable
Q12.8 – Other congenital lens malformationsBillable
Q12.9 – Congenital lens malformation, unspecifiedBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block Q10-Q18

Excludes2 (not included here):

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)

Frequently asked questions

What is ICD-10 code Q12?

Q12 is the ICD-10-CM code for congenital lens malformations, in the block Q10-Q18 (Congenital malformations of eye, ear, face and neck).

Is Q12 a billable code?

No. Q12 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.