R50
Header — not billableFever of other and unknown origin
The ICD-10 code for fever of other and unknown origin is R50.
R50 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- R51Headachenon-billable header
- R52Pain, unspecified
- R53Malaise and fatiguenon-billable header
- R54Age-related physical debility
- R55Syncope and collapse
- R56Convulsions, not elsewhere classifiednon-billable header
- R57Shock, not elsewhere classifiednon-billable header
- R58Hemorrhage, not elsewhere classified
- R59Enlarged lymph nodesnon-billable header
- R60Edema, not elsewhere classifiednon-billable header
- R61Generalized hyperhidrosis
- R62Lack of expected normal physiological development in childhood and adultsnon-billable header
- R63Symptoms and signs concerning food and fluid intakenon-billable header
- R64Cachexia
- R65Symptoms and signs specifically associated with systemic inflammation and infectionnon-billable header
- R68Other general symptoms and signsnon-billable header
- R69Illness, unspecified
- R50Fever of other and unknown originnon-billable header