ICD-10-CM › S00-T88 › S40-S49 › S40.82 Blister (nonthermal) of upper arm › S40.829

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

• S40.829A Blister (nonthermal) of unspecified upper arm, initial encounter
• S40.829D Blister (nonthermal) of unspecified upper arm, subsequent encounter
• S40.829S Blister (nonthermal) of unspecified upper arm, sequela

This code requires a seventh character. See the rule below.

What has happened to this code

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from S40 Superficial injury of shoulder and upper arm

Seventh character required

• The appropriate 7th character is to be added to each code from category S40

Inherited from the S40-S49 section Injuries to the shoulder and upper arm (S40-S49)

Excludes2 - not included here

• burns and corrosions (T20-T32)
• frostbite (T33-T34)
• injuries of elbow (S50-S59)
• insect bite or sting, venomous (T63.4)

Includes

• injuries of axilla
• injuries of scapular region

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

• Blister > axilla
• Blister > upper arm
• Injury > arm > superficial
• Injury > superficial NEC > axilla
• Injury > superficial NEC > blister
• Injury > superficial NEC > arm > blister
• Blister > arm

Codes in the same group

Code	Description	Status
S40.821	Blister (nonthermal) of right upper arm	Not billable
S40.822	Blister (nonthermal) of left upper arm	Not billable