Short answer · Medically reviewed summary · Last updated: 2026-05-08

Frontotemporal degeneration (FTD) is primarily classified under ICD-10 code G31.09, which covers other frontotemporal dementia, while the older ICD-9 system categorized it under 331.19. Because Frontotemporal degeneration encompasses a spectrum of clinical presentations, clinical coding often relies on specific sub-types like Pick’s disease or primary progressive aphasia to ensure accurate medical record keeping. What is the clinical classification of Frontotemporal degeneration? In clinical practice, Frontotemporal degeneration represents a group of heterogeneous neurodegenerative disorders characterized by progressive atrophy of the frontal and temporal lobes.

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ICD10 code of Frontotemporal Degeneration and ICD9 code

ICD-10 and ICD-9 codes for Frontotemporal Degeneration, with classification details for clinicians, coders and patients.

ICD9 and ICD10 codes of Frontotemporal Degeneration

Frontotemporal degeneration (FTD) is primarily classified under ICD-10 code G31.09, which covers other frontotemporal dementia, while the older ICD-9 system categorized it under 331.19. Because Frontotemporal degeneration encompasses a spectrum of clinical presentations, clinical coding often relies on specific sub-types like Pick’s disease or primary progressive aphasia to ensure accurate medical record keeping.



What is the clinical classification of Frontotemporal degeneration?


In clinical practice, Frontotemporal degeneration represents a group of heterogeneous neurodegenerative disorders characterized by progressive atrophy of the frontal and temporal lobes. While the ICD-10 code G31.09 is the most common diagnostic marker, healthcare providers may also use specific codes for associated motor neuron disease or parkinsonism if those features are present. Proper coding for Frontotemporal degeneration is essential for coordinating multidisciplinary care, as the condition requires nuanced management distinct from other forms of dementia.



How does the classification impact care for Frontotemporal degeneration?


Accurate diagnostic coding for Frontotemporal degeneration allows for better access to specialized services. Because this condition often presents in individuals between the ages of 45 and 65, it is frequently misdiagnosed as psychiatric illness. Understanding the specific ICD classification helps in documenting the following clinical hallmarks:



  • Behavioral variant FTD (bvFTD): Changes in personality, social conduct, and empathy.

  • Semantic variant primary progressive aphasia (svPPA): Loss of word meaning and object recognition.

  • Non-fluent/agrammatic variant primary progressive aphasia (nfvPPA): Difficulty with speech production and grammar.

  • FTD-ALS: Co-occurrence of cognitive decline with motor neuron symptoms.



Is there support for those living with Frontotemporal degeneration?


Living with Frontotemporal degeneration can feel isolating, but you are not alone. Currently, 4 members have shared their personal experiences with Frontotemporal degeneration on DiseaseMaps.org, providing a vital space for community connection and shared knowledge. Engaging with others who understand the unique daily challenges of this diagnosis can provide significant emotional relief for both patients and caregivers.



Next steps



  • Consult a neurologist or behavioral neurologist specializing in neurodegenerative diseases for diagnostic confirmation.

  • Request a comprehensive neuropsychological evaluation to document specific cognitive and behavioral changes.

  • Join a patient support group, such as the Association for Frontotemporal Degeneration (AFTD), to access resources and community.

  • Register with DiseaseMaps.org to connect with other families navigating this diagnosis.



Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always consult with your physician regarding your specific health needs.



References



  • NIH Genetic and Rare Diseases Information Center (GARD): Frontotemporal Dementia.

  • Orphanet: Frontotemporal dementia (ORPHA:251025).

  • The Association for Frontotemporal Degeneration (AFTD): Medical Resources.

  • OMIM (Online Mendelian Inheritance in Man): Frontotemporal Dementia (Entry #600274).

Author: DiseaseMaps Editorial Team
Reviewed against authoritative medical sources (NIH GARD, Orphanet, OMIM)
Last updated: 2026-05-08
Medical disclaimer: This information does not substitute professional medical advice. Always consult your doctor before making health decisions.
Source: DiseaseMaps.org
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