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S52.502G vs S52.509G

S52.502G (Unspecified fracture of the lower end of left radius, subsequent encounter for closed fracture with delayed healing) compared with S52.509G (Unspecified fracture of the lower end of unspecified radius, subsequent encounter for closed fracture with delayed healing), 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” (S52.502G) versus “unspecified” (S52.509G): S52.502G is “Unspecified fracture of the lower end of left radius, subsequent encounter for closed fracture with delayed healing”; S52.509G is “Unspecified fracture of the lower end of unspecified radius, subsequent encounter for closed fracture with delayed healing”.

Registry fact

Can these codes be reported together?

One side per condition.S52.502G and S52.509G 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. S52.502G carries 1 Excludes1 note and S52.509G carries 1 Excludes1 note covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

None.Neither entry carries an Excludes2 note that names the other code. S52.502G carries 7 Excludes2 notes and S52.509G carries 7 Excludes2 notes covering other codes; the side-by-side table quotes them.

Official rule

Is one more specific?

No.Both titles are unspecified forms within category S52, and neither is a subdivision of the other.

Registry fact

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. S52.502G and S52.509G 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

S52.502G
Left
Unspecified fracture of the lower end of left radius, subsequent encounter for closed fracture with delayed healing
↔
S52.509G
Unspecified
Unspecified fracture of the lower end of unspecified radius, subsequent encounter for closed fracture with delayed healing

What we found

Same condition, opposite side.S52.502G and S52.509G 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

S52.502GUnspecified fracture of the lower end of left radius, subsequent encounter for closed fracture with delayed healingS52.509GUnspecified fracture of the lower end of unspecified radius, subsequent encounter for closed fracture with delayed healing
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)
DefinitionUnspecified fracture of the lower end of left radius, subsequent encounter for closed fracture with delayed healing is a billable ICD-10-CM diagnosis code (S52.502G).Unspecified fracture of the lower end of unspecified radius, subsequent encounter for closed fracture with delayed healing is a billable ICD-10-CM diagnosis code (S52.509G).
7th characterThe appropriate 7th character is to be added to all codes from category S52The appropriate 7th character is to be added to all codes from category S52
Excludes1
traumatic amputation of forearm (S58.-)
traumatic amputation of forearm (S58.-)
Excludes2
physeal fractures of lower end of radius (S59.2-)
fracture at wrist and hand level (S62.-)
periprosthetic fracture around internal prosthetic elbow joint (M97.4)
burns and corrosions (T20-T32)
frostbite (T33-T34)
injuries of wrist and hand (S60-S69)
insect bite or sting, venomous (T63.4)
physeal fractures of lower end of radius (S59.2-)
fracture at wrist and hand level (S62.-)
periprosthetic fracture around internal prosthetic elbow joint (M97.4)
burns and corrosions (T20-T32)
frostbite (T33-T34)
injuries of wrist and hand (S60-S69)
insect bite or sting, venomous (T63.4)

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.

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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