ICD-10 code S52.001E: Fracture of upper end of right radius, subsequent encounter

Key takeaways

S52.001E is a billable ICD-10-CM code for a fracture of the unspecified upper end of the right radius. It applies to a subsequent encounter for open fracture type I or II with routine healing.

E marks a follow-up visit on an open type I or II fracture that is healing as expected. Delayed union, nonunion, and malunion each take a different 7th character.

The 7th characters follow a grid, with closed, open type I or II, and open type IIIA-C variants of each healing state.

Using the initial encounter character A on a follow-up visit is the most common error in this code set. Confirm the encounter type before you pick the 7th character.

Practice management software like Pabau attaches the correct diagnosis code to each visit, so subsequent-encounter fracture claims are less likely to be denied.

ICD-10 code S52.001E is a billable diagnosis code for a fracture of the unspecified upper end of the right radius. It applies to a follow-up visit where the original fracture was open type I or II and the bone is healing on schedule.

The code belongs to ICD-10-CM Chapter 19, which covers injury, poisoning, and other consequences of external causes. Within that chapter it sits in block S50-S59, for injuries to the elbow and forearm. Per CMS ICD-10-CM guidance, it has been billable since FY2016 and remains active in the current fiscal-year tables.

One thing makes the whole S52.001 set easier to hold in your head. The 7th characters follow a repeating grid rather than a flat list. There are four healing states, namely routine, delayed, nonunion, and malunion. Each one comes in three variants, covering closed fractures, open type I or II, and open type IIIA-C injuries. E is the open type I or II version of routine healing.

ICD-10 code S52.001E: Quick reference

What does S52.001E mean? Full code description

Each segment of S52.001E carries specific clinical meaning. Misreading any segment is enough to select the wrong code. Here is the breakdown:

• S52 – Fracture of forearm. This is the category-level code covering all fractures of the forearm bones, meaning the radius and the ulna.
• S52.0 – Fracture of upper end of radius, also called the proximal radius. It includes fractures of the radial head, the radial neck, and other regions at the upper end.
• S52.00 – Fracture of unspecified part of upper end of radius. Used when the clinical record does not document the specific sub-region, such as head or neck.
• S52.001 – Fracture of unspecified upper end of right radius. The 6th character 1 specifies the right side. A 2 would indicate the left, and a 9 unspecified laterality.
• E (7th character) – Subsequent encounter for open fracture type I or II with routine healing. The patient has finished active treatment and is now receiving routine care during the healing phase, with no complications documented.

The “unspecified upper end” language is important. Use S52.001E only when the documentation does not specify whether the fracture involves the radial head or the radial neck. If the treating clinician has documented the specific site, the more precise code is always preferred.

S52.001E in the ICD-10-CM code hierarchy

Knowing where S52.001E sits in the hierarchy helps you move to sibling codes when laterality or anatomical detail changes. The parent-child structure per the CDC ICD-10-CM web tool runs as follows:

Only the 7th-character codes are billable. Submitting S52.001 without the 7th character will result in a claim rejection.

Understanding the 7th character E: Subsequent encounter for routine healing

The ICD-10 fracture 7th character is where most coding errors occur. Per ICD-10-CM Official Guidelines Section I.C.19.a, it defines both the encounter type and the fracture’s healing status at the time of the visit. S52.001 accepts 16 valid 7th characters.

Here is the full set:

S52.001E covers open fracture type I or II with routine healing on a subsequent encounter. For a closed fracture with routine healing, the correct code is S52.001D. Verify the original fracture documentation before you assign E. ICD-10-CM Official Guidelines Section I.C.19.c sets out the rule for the whole S52 range.

Clinical scenario: When to use S52.001E

A patient presents to an orthopedic practice six weeks after an open Gustilo type I fracture at the unspecified upper end of the right radius. At this follow-up visit, imaging shows the fracture healing on schedule with no callus complications. The patient is in a removable splint and beginning range-of-motion exercises.

This is the clinical profile S52.001E is built for. The coder confirms three conditions, all met here. The encounter is a follow-up rather than the original injury visit. The original fracture was open type I or II. And the treating clinician has documented routine healing.

Elbow examination findings from that visit belong in the note, but they do not change the 7th character. A graded result from the lateral pivot shift test documents stability without altering the fracture classification set at the first encounter.

The decision tree for that same patient scenario looks like this:

1. Is this the first encounter for the fracture? If yes, use A, B, or C. If no, continue.
2. Was the original fracture closed or open? If closed, the subsequent encounter characters are D, G, K, and P. If open, determine the Gustilo type.
3. What Gustilo type was documented? Type I or II points to the E, H, M, and Q column. Type IIIA, IIIB, or IIIC points to the F, J, N, and R column.
4. What is the healing status? Routine healing is E for open type I or II and D for closed. Delayed healing is H or G. Nonunion is M or K. Malunion is Q or P.
5. Confirm the 6th character. Right radius is 1. Left radius is 2. Unspecified is 9.

Physical therapy practices managing post-fracture rehabilitation also use S52.001E on subsequent visits. Physical therapy EMR software that carries the diagnosis forward keeps the code consistent across a course of treatment. State rules matter too, and the Arizona practice requirements show how documentation standards vary.

Related ICD-10-CM codes for upper radius fractures

Coders working with forearm fracture codes regularly need to move between laterality variants, anatomical detail, and encounter types. This table covers the most commonly needed sibling codes. For distal radius fractures, including Colles fracture, the relevant category shifts to S52.5 rather than S52.0. The AAPC code lookup carries the full S52 tabular range, and practices handling high fracture volumes often run sports medicine software built for musculoskeletal coding.

The same 7th-character grid runs through other fracture families. S52.131Q sits at the malunion end of the same radius category, and S42.90XG applies the delayed-healing character at the shoulder girdle.

Billability and reimbursement notes for S52.001E

S52.001E is a billable ICD-10-CM diagnosis code, and it has appeared in every fiscal-year tabular list since FY2016. Billing teams should note the following when submitting claims with it:

• CPT code pairing: For a subsequent office visit, pair with an appropriate E&M CPT code. That is commonly 99213 or 99214, depending on medical decision complexity. For physical or occupational therapy visits, pair with the relevant therapeutic procedure codes. Verify specific pairings against current payer edits, because CPT-to-ICD-10 compatibility varies by payer.
• Medicare claims: S52.001E is accepted for Medicare Part B claims. Coverage is subject to standard Medicare medical necessity requirements. Payer-specific policies may add documentation requirements on top of that.
• Documentation requirements: Clinical notes must show that the encounter is a follow-up. They must also show that the original fracture was open type I or II, and that healing was assessed as routine. A missing healing-status statement is a common audit trigger.
• No additional external cause code required: External cause coding uses the V, W, X, and Y codes. It is optional on subsequent encounters if the cause was captured at the initial visit. Check your own facility’s coding policy.

Orthopedic and physical therapy practices can cut denials on subsequent encounter fracture codes. Claims management software flags diagnosis code requirements while the encounter is still being documented. Two principles carry across every diagnostic code category. Code to the highest documented specificity, and make sure the encounter type matches the 7th character you select.

Common coding errors and how to avoid them

The S52 family generates a disproportionate share of orthopedic billing denials. Even coders who know the 7th character system well make predictable mistakes in this range. Here are the five most common, each with the fix:

• Using A on a follow-up visit: This is the most frequent error. The initial encounter characters A, B, and C apply only while the patient is receiving active or definitive treatment for the first time. Once care becomes routine follow-up, the subsequent encounter characters D through R apply.
• Confusing S52.001 with S52.011: Both involve the upper radius, but they are anatomically distinct. S52.001E applies when the documentation names no sub-region at all. If imaging or operative notes name the radial head, S52.011E is the correct code.
• Omitting the 7th character entirely: S52.001 without a 7th character is not billable. Claims submitted with a six-character fracture code will be rejected outright.
• Selecting the wrong laterality: The 6th character distinguishes right (1), left (2), and unspecified (9). Coding the right side when the record documents the left will not trigger a denial in every payer system. It is still a documentation inaccuracy that creates audit exposure.
• Selecting E instead of D for a closed fracture: S52.001E applies to open fracture type I or II with routine healing. For a closed fracture on a subsequent encounter with routine healing, D is the correct 7th character. Confirm the fracture type before finalizing the code.

How Pabau keeps fracture follow-up coding accurate

In most orthopedic practices, the 7th character gets decided twice. The clinician writes the note. A coder then rereads the original injury record to establish whether the fracture was closed or open type I or II. That second lookup is where the D-for-E swaps happen.

Practice management software like Pabau keeps the original diagnosis on the patient record, so it travels with every follow-up appointment. The Gustilo classification set at the first visit stays visible while the clinician charts. The code then carries onto the claim without a second search through old notes.

Consistent charting does the other half of the work. A structured SOAP progress notes template puts the healing-status statement in the same place on every visit, which is exactly what an auditor looks for. For high volumes of fracture follow-ups, practice management software ties scheduling, charting, and billing into one record. Fewer denials come back, and coders spend less of the week chasing notes.

Reduce fracture claim denials with better documentation

Pabau helps orthopedic practices and physical therapy teams attach the correct ICD-10 diagnosis code to every visit, automate documentation reminders, and submit cleaner claims. See how Pabau handles subsequent encounter coding in practice.

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Conclusion

E is the character that rewards going back to the first encounter record rather than the note in front of you. Once the Gustilo classification is confirmed, the rest of the S52.001 grid reads itself.

The trade-off worth remembering is that unspecified codes are legitimate but rarely ideal. S52.001E is correct when the record does not name the radial head or the radial neck. Where it does name one, the more specific sibling code holds up better in an audit.

Book a demo to see how Pabau keeps fracture documentation and diagnosis coding aligned from the first visit through discharge.

Continue your research

Working through the rest of the radius category? S52.131Q covers a displaced radial neck fracture with malunion on a follow-up visit.

Coding a subsequent encounter for a dislocation instead? S43.139D shows how the same D character works outside the fracture tables.

Need the closed-fracture equivalent in another chapter? S02.600D applies the routine-healing D character to a mandible body fracture.

Assessing elbow stability after a proximal radius injury? Lateral pivot shift test walks through how to perform, grade, and record the result.

Standardizing what goes into every follow-up note? SOAP progress notes template gives you a consistent place to record healing status.

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