2020 ICD-10-CM Diagnosis Code H21.56

Pupillary abnormalities

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • H21.56 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM H21.56 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of H21.56 - other international versions of ICD-10 H21.56 may differ.
Applicable To
  • Deformed pupil
  • Ectopic pupil
  • Rupture of sphincter, pupil
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as H21.56. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • congenital deformity of pupil (
    ICD-10-CM Diagnosis Code Q13.2

    Other congenital malformations of iris

      2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
    Applicable To
    • Anisocoria, congenital
    • Atresia of pupil
    • Congenital malformation of iris NOS
    • Corectopia
    Q13.2-
    )
The following code(s) above H21.56 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to H21.56:
  • H00-H59
    2020 ICD-10-CM Range H00-H59

    Diseases of the eye and adnexa

    Note
    • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury (trauma) of eye and orbit (S05.-)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
    Diseases of the eye and adnexa
  • H21
    ICD-10-CM Diagnosis Code H21

    Other disorders of iris and ciliary body

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    Other disorders of iris and ciliary body
  • H21.5
    ICD-10-CM Diagnosis Code H21.5

    Other and unspecified adhesions and disruptions of iris and ciliary body

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Other and unspecified adhesions and disruptions of iris and ciliary body
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to H21.56:

ICD-10-CM Codes Adjacent To H21.56
H21.54 Posterior synechiae (iris)
H21.541 …… right eye
H21.542 …… left eye
H21.543 …… bilateral
H21.549 …… unspecified eye
H21.55 Recession of chamber angle
H21.551 …… right eye
H21.552 …… left eye
H21.553 …… bilateral
H21.559 …… unspecified eye
H21.56 Pupillary abnormalities
H21.561 Pupillary abnormality, right eye
H21.562 Pupillary abnormality, left eye
H21.563 Pupillary abnormality, bilateral
H21.569 Pupillary abnormality, unspecified eye
H21.8 Other specified disorders of iris and ciliary body
H21.81 Floppy iris syndrome
H21.82 Plateau iris syndrome (post-iridectomy) (postprocedural)
H21.89 Other specified disorders of iris and ciliary body
H21.9 Unspecified disorder of iris and ciliary body
H22 Disorders of iris and ciliary body in diseases classified elsewhere

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.