Q13.4 — Other congenital corneal malformations
Q13.4 is a billable, specific ICD-10-CM code for other congenital corneal malformations. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Congenital malformation of cornea NOS
- Microcornea
- Peter's anomaly
Other codes that can never be billed with Q13.4
These codes carry an Excludes1 note pointing at Q13.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q13.4 alone.
- H18.7Other and unspecified corneal deformities
Risk adjustment
Q13.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
Q13.4 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
- A57483Billing and Coding: Visual Fields
How Q13.4 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q13.4.
- Embryotoxon
- Keratomegaly
- Microcornea(congenital)
- Peter's anomaly
- Anomaly, anomalous›cornea(shape)
- Anomaly, anomalous›Peter's
- Axenfeld's›degeneration(calcareous)
- Cornea›plana
- Keratectasia›congenital
- Keratoconus›congenital
- Malformation›cornea
- Deformity›cornea›congenital
Related codes at this level
Codes that share Q13. If Q13.4 is not quite right, the correct code is usually one of these.
Questions about Q13.4
- Is Q13.4 a billable ICD-10-CM code?
- Yes. Q13.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q13.4 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of eye, ear, face and neck (Q10-Q18).