ICD-10 Code I73.0 – Raynaud’s syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I73.0 – Raynaud’s syndrome
What it is
I73.0 identifies Raynaud’s syndrome, a vasospastic disorder that causes episodic narrowing of blood vessels, usually in the fingers or toes. It is used when documentation specifically states Raynaud’s syndrome.
Clinical signs
Typical findings include color changes in the digits triggered by cold or stress, often with numbness, tingling, or pain. Clinical features vary; refer to documentation.
When to use this code
Use I73.0 when the record documents Raynaud’s syndrome or Raynaud phenomenon as the diagnosis. Apply it for confirmed primary or secondary Raynaud presentations if the provider uses this code. Check documentation when the note only describes cold-induced color changes without a clear diagnosis.
Do not use for
Do not use this code for nonspecific peripheral circulatory symptoms without a documented Raynaud diagnosis. Do not assign it if the provider identifies a different vascular disorder or asks you to code only the underlying condition. Check documentation.
Coding tip
Verify whether the note specifies primary or secondary Raynaud and code any documented underlying disease separately when appropriate.