ICD-10-CM 2027
ICD-10 code for Formication
From the official ICD-10-CM alphabetic index entry “Formication”. Page updated September 29, 2026.
About coding Formication
The ICD-10-CM code for Formication is R20.2 (Paresthesia of skin).
Within R20 (disturbances of skin sensation), R20.2 is specifically for Paresthesia of skin. Related codes cover anesthesia of skin (R20.0), hypoesthesia of skin (R20.1), Hyperesthesia (R20.3), other disturbances of skin sensation (R20.8) and unspecified disturbances of skin sensation (R20.9).
Don't report R20.2 together with the conditions in its Excludes1 note: acroparesthesia (I73.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for R20.2)
- acroparesthesia (I73.8)
Common questions about Formication ICD-10 codes
What is the ICD-10 code for Formication?
- R20.2 — Paresthesia of skin.
Is R20.2 billable?
- Yes. R20.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R20.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R20.2 as a principal diagnosis.
Is R20.2 a CC or MCC?
- No. R20.2 is neither a CC nor an MCC under MS-DRG v44.0.