ICD10BillableValid for clinical use

ICD-10 Code Q12.3: Congenital aphakia

Q12.3 is a billable ICD-10 diagnosis code used to classify Congenital aphakia in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

When is it used?

  • May be used when a clinician documents congenital aphakia in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
17Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
block
Q10-Q18Congenital malformations of eye, ear, face and neck
category
Q12Congenital lens malformations
currentQ12

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Coverage-related procedures and services

CPT 66984high
EXTRACAPSULAR CATARACT REMOVAL WITH INSERTION OF INTRAOCULAR LENS PROSTHESIS (1 STAGE PROCEDURE), MANUAL OR MECHANICAL TECHNIQUE (EG, IRRIGATION AND ASPIRATION OR PHACOEMULSIFICATION); WITHOUT ENDOSCOPIC CYCLOPHOTOCOAGULATION
Source: CMS coverage guidance
CPT 66983high
INTRACAPSULAR CATARACT EXTRACTION WITH INSERTION OF INTRAOCULAR LENS PROSTHESIS (1 STAGE PROCEDURE)
Source: CMS coverage guidance
CPT 66840high
REMOVAL OF LENS MATERIAL; ASPIRATION TECHNIQUE, 1 OR MORE STAGES
Source: CMS coverage guidance
CPT 66940high
REMOVAL OF LENS MATERIAL; EXTRACAPSULAR (OTHER THAN 66840, 66850, 66852)
Source: CMS coverage guidance
CPT 66920high
REMOVAL OF LENS MATERIAL; INTRACAPSULAR
Source: CMS coverage guidance
CPT 66930high
REMOVAL OF LENS MATERIAL; INTRACAPSULAR, FOR DISLOCATED LENS
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
Q12.3

Common synonyms

Congenital aphakia

Frequently asked questions

Code details

CodeQ12.3
SystemICD10
Display nameCongenital aphakia
ChapterCongenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
BlockCongenital malformations of eye, ear, face and neck

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Absence(of) (organ or part) (complete or partial)AgenesisAphakia(acquired) (postoperative)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code Q12.3 for Congenital aphakia | HealthAssure