Skip to main content

T22.722S vs T22.729S

T22.722S (Corrosion of third degree of left elbow, sequela) compared with T22.729S (Corrosion of third degree of unspecified elbow, sequela), from the official CMS tabular data.

Summary

These codes name the same condition on opposite sides of the body, so the documented side decides which one applies.

MedCoder-derived
What is different?

Title wording.The titles differ in one word, “left” (T22.722S) versus “unspecified” (T22.729S): T22.722S is “Corrosion of third degree of left elbow, sequela”; T22.729S is “Corrosion of third degree of unspecified elbow, sequela”.

Registry fact

Can these codes be reported together?

One side per condition.T22.722S and T22.729S name the same condition on opposite sides of the body. Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

MedCoder-derivedGuide: Laterality coding

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code.

Official rule

Is there an Excludes2 relationship?

None.Neither entry carries an Excludes2 note that names the other code. T22.722S carries 2 Excludes2 notes and T22.729S carries 2 Excludes2 notes covering other codes; the side-by-side table quotes them.

Official rule

Is one more specific?

Yes.T22.722S’s title names the condition; T22.729S’s title is the unspecified form (“Corrosion of third degree of unspecified elbow, sequela”).

MedCoder-derivedGuide: Other vs unspecified (NEC vs NOS)

Is one a parent or header code?

No.Both are billable codes, and neither contains the other.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

Yes.Same condition, opposite side. T22.722S and T22.729S name the same condition on opposite sides of the body.

MedCoder-derivedGuide: Laterality coding

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule.

Can these codes be reported together?

Review

Laterality relationship

T22.722S
Left
Corrosion of third degree of left elbow, sequela
↔
T22.729S
Unspecified
Corrosion of third degree of unspecified elbow, sequela

What we found

Same condition, opposite side.T22.722S and T22.729S name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

What to review

Report the side the documentation names. Where the code set provides a bilateral code and both sides are documented, use it instead of the pair.

Guide: Laterality codingCheck these on a claim

Why it matters

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source / rule

ICD-10-CM tabular list (laterality variant derived from the code title)

Side by side

T22.722SCorrosion of third degree of left elbow, sequelaT22.729SCorrosion of third degree of unspecified elbow, sequela
Billing statusBillableBillable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionCorrosion of third degree of left elbow, sequela is a billable ICD-10-CM diagnosis code (T22.722S).Corrosion of third degree of unspecified elbow, sequela is a billable ICD-10-CM diagnosis code (T22.729S).
7th characterThe appropriate 7th character is to be added to each code from category T22The appropriate 7th character is to be added to each code from category T22
Includes
burns and corrosions of first degree [erythema]
burns and corrosions of second degree [blisters][epidermal loss]
burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
burns and corrosions of first degree [erythema]
burns and corrosions of second degree [blisters][epidermal loss]
burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
Excludes2
burn and corrosion of interscapular region (T21.-)
burn and corrosion of wrist and hand (T23.-)
burn and corrosion of interscapular region (T21.-)
burn and corrosion of wrist and hand (T23.-)
Code first
(T51-T65) to identify chemical and intent
(T51-T65) to identify chemical and intent
Use additional code
external cause code to identify place (Y92)
code from category T31 or T32 to identify extent of body surface involved
external cause code to identify place (Y92)
code from category T31 or T32 to identify extent of body surface involved

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2026). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources