ICD-10-CM code · FY2027
G99.8 Other specified disorders of nervous system in diseases classified elsewhere
BillableValid for claims as a specific diagnosis code
About G99.8
- Code
- G99.8
- Billable
- Yes
- Short description
- Oth disrd of nervous system in diseases classified elsewhere
- Category
- G99 Other disorders of nervous system in diseases classified elsewhere
- Block
- G89-G99 Other disorders of the nervous system
- Chapter
- 6 Diseases of the nervous system
- Code set
- FY2027, October 1, 2026 to September 30, 2027
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Coding notes for G99.8
Excludes1 Not coded here: never report these together with this code (use the code given instead).
Code first Report the underlying condition's code before this one.
Chapter 6 notes (apply to every code in it)
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
- 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)
- endocrine, nutritional and metabolic diseases (E00-E88)
- 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)
Related codes in G99
Latest research on disorders of nervous system
- Status epilepticus cause may predict likelihood of neurologic recovery but not short-term mortality
- 2 Minute Medicine Rewind February 9, 2026
- Sertraline is associated with a lower risk of opioid overdose compared to other selective serotonin reuptake inhibitors in patients taking hydrocodone
- 2 Minute Medicine Rewind December 1st, 2025
- Prenatal Systemic Glucocorticoid Exposure and an Increased Risk of Future Mental Disorders
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