Q10 vs Q11.2
Q10 and Q11.2 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on Q10
cryptophthalmos NOS (Q11.2)
Q10
Congenital malformations of eyelid, lacrimal apparatus and orbit
Not billable
- Chapter 17
- Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q10-Q18
Q11.2
Microphthalmos
Billable
- Chapter 17
- Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q10-Q18
Use when the record says
- Cryptophthalmos NOS
- Dysplasia of eye
- Hypoplasia of eye
- Rudimentary eye
Indexed under
- Cryptophthalmos
- Microphthalmos, microphthalmia (congenital)
- Dysplasia › eye
- Hypoplasia, hypoplastic › eye
- Rudimentary › eye (congenital)
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027