T30.4 Corrosion of unspecified body region, unspecified degree

Billable ICD-10-CM code, FY2026.

Applicable to

• This code is not for inpatient use. Code to specified site and degree of corrosion
• Corrosion NOS
• Multiple corrosion NOS

MS-DRG index

Defines the logic of DRG(s) 935 in MDC 22.

Approximate ICD-9-CM (GEMs)

• 949.0 Burn of unspecified site, unspecified degree (approximate)

Code annotations containing back-references to T30.4

Back-references to T30

• Type 1 Excludes: T66 Radiation sickness, unspecified ("burns (T20-T31)")
• Type 2 Excludes: T67 Effects of heat and light ("burns (T20-T31)")
• Type 2 Excludes: T75 Other and unspecified effects of other external causes ("burns (electric) (T20-T31)")

Diagnosis Index entries for T30.4

• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)

Nearby codes

• T30 Burn and corrosion, body region unspecified
• T30.0 Burn of unspecified body region, unspecified degree
• T30.4 Corrosion of unspecified body region, unspecified degree (this code)