2027 ICD-10-CM Diagnosis Code H50.9Unspecified strabismus
ICD-10-CM Codes›H00–H59›H49-H52›H50
- Billable — Valid for Submission
- Not Chronic
H50.9 is a billable ICD-10-CM diagnosis code for unspecified strabismus. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Strabismus.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- A pattern strabismus
- Abnormal blue sclerae
- Anterior maxillary protrusion, strabismus, intellectual disability syndrome
- Blue nevus of skin
- Congenital anomaly of sclera
- Congenital dermal melanocytosis
- Congenital ectopic pupil
- Congenital pes cavus
- Congenital prognathism
- Congenital strabismus
- Converge in manifest squint, fusion intersection of vis axes
- Convergence in manifest squint
- Convergence in manifest squint,anomalous with constant angle
- Convergence manifest squint,diverge intersection of vis axes
- Crowding of teeth
- Direction of squint
- Disjunctive ocular movements - finding
- Ectopic pupil
- Finding of ocular balance
- Hemifacial hyperplasia
- Hemifacial hyperplasia strabismus syndrome
- Hypertelorism
- Hypotropia
- Intellectual disability with strabismus syndrome
- Lambda pattern strabismus
- Long face syndrome
- Maxillary jaw size anomaly
- Maxillary prognathism
- Mehes syndrome
- Ocular convergence - finding
- Open bite
- Ptosis, strabismus, ectopic pupil syndrome
- Severe growth deficiency, strabismus, extensive dermal melanocytosis, intellectual disability syndrome
- Severe hypotonia, psychomotor developmental delay, strabismus, cardiac septal defect syndrome
- Severe intellectual disability, hypotonia, strabismus, coarse face, planovalgus syndrome
- Severe intellectual disability, poor language, strabismus, grimacing face, long fingers syndrome
- Speech delay
- Strabismus
- Strabismus following cataract surgery
- Strabismus following ocular surgery
- Strabismus following retinal surgery
- Telecanthus
- Telecanthus, hypertelorism, strabismus, pes cavus syndrome
- Vertical maxillary excess
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H50.9: its own notes plus those printed at block H49-H52 and 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.
- nystagmus and other irregular eye movements (H55)
- 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 H50.9, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
eye muscle NOS H50.9
muscle See Also: Disease, muscle;
ocular NEC H50.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Strabismus
misalignment of the visual axes of the eyes. in comitant strabismus the degree of ocular misalignment does not vary with the direction of gaze. in noncomitant strabismus the degree of misalignment varies depending on direction of gaze or which eye is fixating on the target. (miller, walsh & hoyt's clinical neuro-ophthalmology, 4th ed, p641)
Patient EducationClinical
Eye Movement Disorders
When you look at an object, you're using several muscles to move both eyes to focus on it. If you have a problem with the muscles, the eyes don't work properly.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H50.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H50.9Overview
What is the ICD-10 code for unspecified strabismus?
The ICD-10-CM code for unspecified strabismus is H50.9 (sometimes written as H509). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H50.9 (Other strabismus) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified strabismus on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H50.9 group to?
When unspecified strabismus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of H50.9?
Under the General Equivalence Mappings, unspecified strabismus converts to ICD-9-CM 378.9 (eye movemnt disorder NOS). The mapping is approximate, so confirm the match fits the documentation.
