H49.13
BillableFourth [trochlear] nerve palsy, bilateral
Fourth [trochlear] nerve palsy, bilateral
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •diabetes mellitus related eye conditions, , ,E09.3, E10.3, E11.3, E13.3
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury (trauma) of eye and orbitS05
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •syphilis related eye disorders, , ,A50.01, A50.3, A51.43, A52.71
- •nystagmus and other irregular eye movementsH55
- •internal ophthalmoplegiaH52.51
- •internuclear ophthalmoplegiaH51.2
- •progressive supranuclear ophthalmoplegiaG23.1
Related Codes(3)
Also Known As / Clinical Terms(33)
SNOMED CT
- 4th nerve palsy20610004
- Fourth cranial nerve palsy20610004
- Fourth cranial nerve paralysis20610004
- Fourth cranial nerve paresis20610004
- Fourth nerve palsy20610004
- IV nerve palsy20610004
- Superior oblique palsy20610004
- Trochlear nerve palsy20610004
- Trochlear nerve paralysis20610004
- Trochlear nerve weakness20610004
- Bilateral superior oblique palsy400944001
- Bilateral superior oblique paralysis400944001
- Bilateral superior oblique paresis400944001
- Bilateral trochlear nerve palsy400944001
- Bilateral trochlear nerve paralysis400944001
- Bilateral trochlear nerve paresis400944001
Clinical Terms
- Bilateral trochlear nerve palsy
- Bilateral trochlear nerve paralysis
- Trochlear nerve weakness
- Bilateral superior oblique paralysis
- Bilateral trochlear nerve paresis
- Fourth cranial nerve paralysis
- Superior oblique palsy
- Fourth nerve palsy
- Trochlear nerve palsy
- 4th nerve palsy
- IV nerve palsy
- Bilateral superior oblique palsy
- Trochlear nerve paralysis
- Bilateral superior oblique paresis
- Fourth cranial nerve palsy
- Fourth cranial nerve paresis
Frequently Asked Questions
What is the ICD-10 code for fourth [trochlear] nerve palsy, bilateral?
The ICD-10-CM code for fourth [trochlear] nerve palsy, bilateral is H49.13. The full clinical description is "Fourth [trochlear] nerve palsy, bilateral". H49.13 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code H49.13 mean?
ICD-10-CM code H49.13 represents “Fourth [trochlear] nerve palsy, bilateral”. It is classified under Chapter 7: Diseases of the Eye and Adnexa and is a billable/specific code that can be used on a claim.
Is H49.13 a billable code?
Yes, H49.13 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is H49.13 in?
H49.13 is in Chapter 7: Diseases of the Eye and Adnexa (codes H00-H59).
What SNOMED CT codes does H49.13 map to?
H49.13 maps to 2 SNOMED CT concepts: 20610004, 400944001. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for H49.13?
H49.13 is linked to 1 UMLS Concept Unique Identifier: C2881287. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does H49.13 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like fourth [trochlear] nerve palsy, bilateral affect a person's functioning: body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of H49.13?
There is no direct ICD-11 mapping available for H49.13 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.