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ICD-10-CM Codes
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H00-H59
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H15-H22
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H21-
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2023 ICD-10-CM Diagnosis Code H21.81
2023 ICD-10-CM Diagnosis Code H21.81
Floppy iris syndrome
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
- H21.81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2023 edition of ICD-10-CM H21.81 became effective on October 1, 2022.
- This is the American ICD-10-CM version of H21.81 - other international versions of ICD-10 H21.81 may differ.
Applicable To- Intraoperative floppy iris syndrome (IFIS)
Use AdditionalUse Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
- code for adverse effect, if applicable, to identify drug (T36-T50
ICD-10-CM Range T36-T50
Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substancesCode First- , for adverse effects, the nature of the adverse effect, such as:
- adverse effect NOS (T88.7)
- aspirin gastritis (K29.-)
- blood disorders (D56-D76)
- contact dermatitis (L23-L25)
- dermatitis due to substances taken internally (L27.-)
- nephropathy (N14.0-N14.2)
Includes- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Note- The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.
Type 1 Excludes- toxic reaction to local anesthesia in pregnancy (O29.3-)
Type 2 Excludes- abuse and dependence of psychoactive substances (F10-F19)
- abuse of non-dependence-producing substances (F55.-)
- immunodeficiency due to drugs (D84.821)
- drug reaction and poisoning affecting newborn (P00-P96)
- pathological drug intoxication (inebriation) (F10-F19)
Use Additional- code(s) to specify:
- manifestations of poisoning
- underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
- underdosing of medication regimen (Z91.12-, Z91.13-)
- T36 Poisoning by, adverse effect of and unde...
- T37 Poisoning by, adverse effect of and unde...
- T38 Poisoning by, adverse effect of and unde...
- T39 Poisoning by, adverse effect of and unde...
- T40 Poisoning by, adverse effect of and unde...
- T41 Poisoning by, adverse effect of and unde...
- T42 Poisoning by, adverse effect of and unde...
- T43 Poisoning by, adverse effect of and unde...
- T44 Poisoning by, adverse effect of and unde...
- T45 Poisoning by, adverse effect of and unde...
- T46 Poisoning by, adverse effect of and unde...
- T47 Poisoning by, adverse effect of and unde...
- T48 Poisoning by, adverse effect of and unde...
- T49 Poisoning by, adverse effect of and unde...
- T50 Poisoning by, adverse effect of and unde...
The following code(s) above
H21.81 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
H21.81:
- Bilateral intraoperative floppy iris syndrome (eye condition)
- Intraoperative floppy iris syndrome
- Intraoperative floppy iris syndrome of bilateral eyes
- Intraoperative floppy iris syndrome of left eye
- Intraoperative floppy iris syndrome of right eye
- Left intraoperative floppy iris syndrome (eye condition)
- Right intraoperative floppy iris syndrome (eye condition)
ICD-10-CM H21.81 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
- 124 Other disorders of the eye with mcc
- 125 Other disorders of the eye without mcc
Convert H21.81 to ICD-9-CM
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
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
Code annotations containing back-references to H21.81:
ICD-10-CM Codes Adjacent To H21.81
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
H25.0 Age-related incipient cataract
H25.01 Cortical age-related cataract
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
