2027 ICD-10-CM Diagnosis Code H57.04Mydriasis
ICD-10-CM Codes›H00–H59›H55-H57›H57
- Billable — Valid for Submission
- Not Chronic
H57.04 is a billable ICD-10-CM diagnosis code for mydriasis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 123. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified eye disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral fixed dilatation of pupil
- Congenital mydriasis
- Dilated pupil
- Episodic mydriasis due to parasympathetic insufficiency
- Episodic mydriasis due to sympathetic hyperactivity
- Episodic mydriasis of left pupil
- Episodic mydriasis of right pupil
- Fixed dilatation of left pupil
- Fixed dilatation of pupil
- Fixed dilatation of right pupil
- Mydriasis innervational defect
- Mydriasis not due to mydriatic eye drop
- Persistent mydriasis
- Traumatic mydriasis
- Urrets-Zavalia syndrome of eye due to and following ocular surgery
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H57.04: its own notes plus those printed at Chapter 7. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- 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)
Notes
General instructions on how these codes are used.
- Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name H57.04, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Mydriasis
dilation of pupils to greater than 6 mm combined with failure of the pupils to constrict when stimulated with light. this condition may occur due to injury of the pupillary fibers in the oculomotor nerve, in acute angle-closure glaucoma, and in adie syndrome.
Patient EducationClinical
Eye Diseases
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Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H57.04 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H57.04Overview
What is the ICD-10 code for mydriasis?
The ICD-10-CM code for mydriasis is H57.04 (sometimes written as H5704). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H57.04 (Anomalies of pupillary function) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report mydriasis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H57.04 group to?
When mydriasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 123 (neurological Eye Disorders), which carries a relative weight of 0.8218. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of H57.04?
Under the General Equivalence Mappings, mydriasis converts to ICD-9-CM 379.43 (mydriasis not d/t mydrtc). The mapping is a direct match.
