Is R20.1 a billable ICD-10-CM code?

Yes. R20.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does R20.1 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the skin and subcutaneous tissue (R20-R23).

What cannot be coded together with R20.1?

R20.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above R20.1 (R20) and apply to it just the same.

R20.1

R20.1 — Hypoesthesia of skin

Billable / specific codeICD-10-CM

R20.1 is a billable, specific ICD-10-CM code for hypoesthesia of skin. It is valid for submission on a claim.

Excludes1 inherited from the categories above R20.1

These are not written on R20.1, but they bind it: a note on a category applies to every code beneath it. Billing R20.1 with anything listed here is a denial.

Written on R20 — Disturbances of skin sensation

dissociative anesthesia and sensory loss (F44.6)
psychogenic disturbances (F45.8)

Risk adjustment

R20.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

R20.1 is named in 28 Medicare coverage policies — 25 listing it as supporting medical necessity, and 3 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56034Billing and Coding: Nerve Blockade for Treatment of Chronic Pain and Neuropathynot covered
A57589Billing and Coding: Nerve Blocks for Peripheral Neuropathynot covered
A57663Billing and Coding: Nerve Blocks for Peripheral Neuropathynot covered
A53057Billing and Coding: Home Health Occupational Therapy

How R20.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R20.1.

Hemihypesthesia
Hypesthesia
Hypoesthesia
Disturbance›sensation NEC›skin›hypoesthesia

Code history

R20.1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share R20. If R20.1 is not quite right, the correct code is usually one of these.

Questions about R20.1

Is R20.1 a billable ICD-10-CM code?: Yes. R20.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R20.1 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the skin and subcutaneous tissue (R20-R23).
What cannot be coded together with R20.1?: R20.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above R20.1 (R20) and apply to it just the same.