Symptoms and signs involving the skin and subcutaneous tissue (R20-R23)
chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings
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Instructional notes
Excludes2: not included here, code separately if applicable
- symptoms relating to breast (N64.4-N64.5)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers when to report symptom, sign, and abnormal finding codes (R00-R99), plus specific rules for falls, coma scales, non-infectious SIRS, death NOS, and NIHSS scores.
- Use of symptom codes (page 75)
- Use of a symptom code with a definitive diagnosis code (page 75)
- Combination codes that include symptoms (page 75)
- Repeated falls (page 76)
- Coma (page 76)
- Functional quadriplegia (page 76)
- SIRS due to Non-Infectious Process (page 77)
- Death NOS (page 77)
All codes under R20-R23
R20-R23 can't be used on a claim. Pick a billable code below; grey headings group them.
- R20Disturbances of skin sensation
- R20.0Anesthesia of skin
- R20.1Hypoesthesia of skin
- R20.2Paresthesia of skin
- R20.3Hyperesthesia
- R20.8Other disturbances of skin sensation
- R20.9Unspecified disturbances of skin sensation
- R21Rash and other nonspecific skin eruption
- R22Localized swelling, mass and lump of skin and subcutaneous tissue
- R22.0Localized swelling, mass and lump, head
- R22.1Localized swelling, mass and lump, neck
- R22.2Localized swelling, mass and lump, trunk
- R22.3Localized swelling, mass and lump, upper limb
- R22.30Localized swelling, mass and lump, unspecified upper limb
- R22.31Localized swelling, mass and lump, right upper limb
- R22.32Localized swelling, mass and lump, left upper limb
- R22.33Localized swelling, mass and lump, upper limb, bilateral
- R22.4Localized swelling, mass and lump, lower limb
- R22.40Localized swelling, mass and lump, unspecified lower limb
- R22.41Localized swelling, mass and lump, right lower limb
- R22.42Localized swelling, mass and lump, left lower limb
- R22.43Localized swelling, mass and lump, lower limb, bilateral
- R22.9Localized swelling, mass and lump, unspecified
- R23Other skin changes
- R23.0Cyanosis
- R23.1Pallor
- R23.2Flushing
- R23.3Spontaneous ecchymoses
- R23.4Changes in skin texture
- R23.8Other skin changes
- R23.9Unspecified skin changes
R20-R23 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Peripheral Nerve Disorders
Nerves are like wires that carry messages back and forth between your brain and your body. Your peripheral nerves branch off from your brain and spinal cord and connect to all parts of your body, including your muscles and organs. Peripheral nerves carry messages from your brain that control your movement, breathing, heartbeat, digestion, and more. They also carry messages from your body to your brain, so you can feel things, such as pain, heat, and cold.
Read more about peripheral nerve disorders on MedlinePlus