Disturbances of skin sensation (R20) ICD-10-CM
The R20 code range covers disturbances of skin sensation with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the R20 Range 7 codes · 6 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the R20 range.
Hyperacusis
An abnormally disproportionate increase in the sensation of loudness in response to auditory stimuli of normal volume. COCHLEAR DISEASES; VESTIBULOCOCHLEAR NERVE DISEASES; FACIAL NERVE DISEASES; STAPES SURGERY; and other disorders may be associated with this condition.
Hyperalgesia
An increased sensation of pain or discomfort produced by minimally noxious stimuli due to damage to soft tissue containing NOCICEPTORS or injury to a peripheral nerve.
Hyperesthesia
Increased sensitivity to cutaneous stimulation due to a diminished threshold or an increased response to stimuli.
Nociceptors
Peripheral AFFERENT NEURONS which are sensitive to injuries or pain, usually caused by extreme thermal exposures, mechanical forces, or other noxious stimuli. Their cell bodies reside in the DORSAL ROOT GANGLIA. Their peripheral terminals (NERVE ENDINGS) innervate target tissues and transduce noxious stimuli via axons to the CENTRAL NERVOUS SYSTEM.
Paresthesia
Subjective cutaneous sensations (e.g., cold, warmth, tingling, pressure, etc.) that are experienced spontaneously in the absence of stimulation.
Synesthesia
The experience of involuntary sensory cross activation where the presentation of a particular stimulus elicits a secondary sensory-perceptual experience. It most commonly occurs in the association of color with linguistic stimuli such as letters, numbers, words, or music, but can also occur between other senses. Although synesthesia can be acquired or transient due to trauma or drug use, there is also a strong genetic component, with a prevalence of about 1 in 2,000 individuals and a female to male ratio of 6:1.
About the R20 Code Range
The ICD-10 code section R20 covers a range of disturbances of skin sensation, including anesthesia, hypoesthesia, paresthesia, hyperesthesia, and other sensory abnormalities. These codes help healthcare professionals specify types of altered skin sensations, such as numbness, tingling, or increased sensitivity.
This group of codes details unique sensory conditions affecting the skin. For example, R20.0 is used for anesthesia of skin, describing complete loss of sensation often referred to as numbness in areas like the face, limbs, or specific regions (e.g., “stocking anesthesia”). R20.1 captures hypoesthesia, meaning reduced skin sensation, sometimes linked to surgical complications or congenital conditions. R20.2 identifies paresthesia, which includes tingling or pins-and-needles sensations commonly called “numbness and tingling.” Meanwhile, R20.3 represents hyperesthesia, describing increased or abnormal sensitivity, including painful responses to normally non-painful stimuli (allodynia). Codes R20.8 and R20.9 cover other or unspecified skin sensation disturbances, addressing diverse or unclear symptoms. Medical coders use these codes to accurately document and differentiate sensory skin issues encountered in clinical settings, ensuring proper classification and communication.
Questions About This Page
How many billable codes are in the R20 range?
Of the 7 codes in this range, 6 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the R20 range classify?
The range classifies disturbances of skin sensation. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
