Short answer · Medically reviewed summary · Last updated: 2026-05-08
Prosopagnosia, often referred to as face blindness, does not have a unique, dedicated code in the ICD-10 or ICD-9 systems; it is typically classified under broader neurological categories such as R48.8 (Other symbolic dysfunctions) in ICD-10 or 784.69 (Other symbolic dysfunction) in ICD-9. Because prosopagnosia is a complex cognitive deficit rather than a singular systemic disease, clinicians often use these codes to document the functional impairment associated with the condition. What is the clinical classification of Prosopagnosia? While prosopagnosia is a recognized clinical entity, the lack of a specific ICD code reflects its diverse origins, which can be either congenital (developmental) or acquired through brain injury.
ICD10 code of Prosopagnosia and ICD9 code
ICD-10 and ICD-9 codes for Prosopagnosia, with classification details for clinicians, coders and patients.
Prosopagnosia, often referred to as face blindness, does not have a unique, dedicated code in the ICD-10 or ICD-9 systems; it is typically classified under broader neurological categories such as R48.8 (Other symbolic dysfunctions) in ICD-10 or 784.69 (Other symbolic dysfunction) in ICD-9. Because prosopagnosia is a complex cognitive deficit rather than a singular systemic disease, clinicians often use these codes to document the functional impairment associated with the condition.
What is the clinical classification of Prosopagnosia?
While prosopagnosia is a recognized clinical entity, the lack of a specific ICD code reflects its diverse origins, which can be either congenital (developmental) or acquired through brain injury. In the medical literature, prosopagnosia is defined as a selective deficit in the recognition of faces, despite normal visual acuity and intellectual function. Because it is a neuropsychological condition, it is often documented under codes relating to "agnosia" or "perceptual disturbances" depending on the underlying etiology, such as stroke, trauma, or neurodegenerative disease.
How is Prosopagnosia diagnosed?
Diagnosis of prosopagnosia relies on specialized neuropsychological testing rather than a single blood test or imaging scan. Clinicians typically utilize standardized instruments to assess the ability to identify faces, distinguish between similar faces, and process facial expressions. The following methods are commonly employed in a clinical setting:
- Cambridge Face Memory Test (CFMT): A widely used tool to quantify the severity of face recognition deficits.
- Warrington Recognition Memory Test: Used to distinguish between facial recognition and general object recognition.
- Neuroimaging (MRI/fMRI): Often performed to rule out structural lesions in the fusiform gyrus for those with acquired prosopagnosia.
- Patient History: Assessing long-term developmental challenges in recognizing family members or peers.
Next steps
- Consult a neurologist or neuropsychologist to obtain an official assessment if you suspect you have prosopagnosia.
- Connect with the 101 members of the Prosopagnosia community on DiseaseMaps.org to share coping strategies.
- Utilize compensatory strategies, such as identifying individuals by their gait, voice, or distinctive accessories, which are common tactics for those living with prosopagnosia.
Medical disclaimer: This information is for educational purposes and does not replace professional medical advice, diagnosis, or treatment from a qualified healthcare provider.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Prosopagnosia
- Orphanet: Rare diseases database and classification
- Online Mendelian Inheritance in Man (OMIM): Developmental Prosopagnosia
- World Health Organization (WHO): ICD-10 and ICD-11 Browser
