2025 ICD-10-CM code Q85.9
(Active) Effective Date: N/A Revision Date: N/A Deletion Date: N/A Congenital malformations - Other congenital malformations (Q80-Q89) Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) Feed
Phakomatosis, unspecified. This code is used to classify unspecified phakomatosis, a group of developmental disorders characterized by benign tumors.
No specific modifiers are typically used with this code. The use of any modifiers would depend on specific clinical circumstances.
Medical necessity for coding Q85.9 is established when clinical findings strongly suggest a phakomatosis but further diagnostic evaluation is required to establish the specific type.Appropriate diagnostic testing is required.
Diagnosis and management of phakomatosis, including clinical examination, imaging studies, and genetic testing if necessary. Referral to specialists depending on organ involvement.
- Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- Q80-Q89 (Other congenital malformations)
In simple words: This code describes a condition called phakomatosis, where benign (non-cancerous) tumors develop in different parts of the body.Doctors use this code when they don't know the exact type of phakomatosis.
Q85.9 is an ICD-10-CM code that represents Phakomatosis, unspecified.Phakomatoses are a group of rare genetic disorders characterized by the presence of benign tumors affecting various organs.These tumors are often associated with developmental abnormalities and neurological symptoms. The unspecified nature of this code signifies that the specific type of phakomatosis is not known or cannot be specified.
Example 1: A newborn infant presents with multiple skin lesions consistent with a phakomatosis. Further investigations are needed to determine the specific type. Q85.9 is assigned pending further diagnostic workup., A 5-year-old child presents with neurological symptoms and retinal lesions.Imaging reveals brain tumors suggestive of a phakomatosis, but further tests are needed for definitive classification. Q85.9 is used temporarily until the diagnosis is more precisely determined., An adult patient is diagnosed with a phakomatosis that impacts multiple organ systems. However, genetic testing does not definitively identify a subtype of phakomatosis. Q85.9 is employed reflecting the clinical picture.
Complete medical history, physical examination findings focusing on the affected organ systems, relevant imaging studies (e.g., MRI, CT scans, ophthalmologic examinations), genetic testing results if available, and any relevant laboratory tests.
** This code is for use in cases where a definitive diagnosis of a specific type of phakomatosis cannot be made.Further investigation and more specific coding are expected as more information becomes available.
- Payment Status: Active
- Modifier TC rule: Not applicable.
- Specialties:Genetics, Neurology, Dermatology, Ophthalmology, depending on organ system involvement.
- Place of Service:Office, Hospital, Inpatient, Outpatient