ICD-10 Code S72.466E: Nondisplaced supracondylar femur fracture

Key takeaways

S72.466E is a billable ICD-10-CM code for a nondisplaced supracondylar femur fracture with intracondylar extension, side not specified.

The 7th character E means a subsequent encounter for an open Gustilo type I or II fracture that is healing routinely.

The 6th character 6 means the record never named a side; use S72.464E for right and S72.465E for left.

S72.466E is not a medial condyle code. The medial condyle series is S72.43x, where S72.435E covers the nondisplaced left condyle.

Practice management software like Pabau validates ICD-10-CM codes before submission and files claims through its Claim.MD integration.

S72.466E is a billable ICD-10-CM code for a nondisplaced supracondylar fracture with intracondylar extension of the lower end of the unspecified femur.

It is reported at a subsequent encounter, after an open Gustilo type I or II fracture, when healing is routine. Every element of that description carries a coding consequence.

This reference page covers the code description, a character-by-character breakdown, and the full 7th character list. It also covers sibling codes, documentation requirements, and the errors that generate claim edits.

The audience is medical coders, orthopedic clinicians, and billing teams handling distal femur fracture claims.

One mix-up dominates lookups for this code. S72.466E is frequently quoted as a medial condyle fracture of the left femur, and it is neither. Medial condyle fractures sit in the S72.43x series, and the unspecified 6th character here means no side was documented at all.

What does S72.466E mean? Breaking down each character

Each character in S72.466E encodes a distinct attribute. Misreading any one of them produces a code that does not match the documented condition. That creates a compliance risk, and code accuracy is part of HIPAA compliance for medical offices.

The 6th character does double duty in this subcategory. It carries displacement status and laterality at the same time. That is why 1 through 3 are the displaced codes and 4 through 6 are the nondisplaced ones. A quick check on the AAPC Codify ICD-10-CM lookup confirms the breakdown against the official tabular list.

Code hierarchy: Where S72.466E sits in ICD-10-CM

S72.466E is the seven-character end point of a five-level chain. Reading the chain from the top is the fastest way to confirm you have the right code before you submit.

• S00-T88: Injury, poisoning and certain other consequences of external causes
• S70-S79: Injuries to the hip and thigh
• S72: Fracture of femur
• S72.4: Fracture of lower end of femur
• S72.46: Supracondylar fracture with intracondylar extension of lower end of femur
• S72.466: Nondisplaced, lower end of unspecified femur (not billable on its own)
• S72.466E: Subsequent encounter for open fracture type I or II with routine healing

Two branches of that chain trip coders up. S72.45 covers the same supracondylar region without intracondylar extension, and S72.43 covers the medial condyle itself. Both describe a distal femur fracture, and neither is interchangeable with S72.46.

Anatomy: Supracondylar fractures with intracondylar extension

The supracondylar region is the flared metaphysis of the distal femur, immediately above the medial and lateral condyles. A supracondylar fracture crosses that flare. When the fracture line also runs down between the condyles, it has intracondylar extension. At that point the injury is intra-articular, meaning it reaches the knee joint surface.

That distinction is what separates S72.46 from S72.45. It matters clinically as well as for coding, because a fracture line reaching the joint surface changes the treatment plan and the long-term outlook. Nondisplaced means the fracture lines are present but the fragments remain in acceptable alignment.

• Location: Distal femoral metaphysis above the condyles, with the fracture line extending into the knee joint surface
• Pattern family: Corresponds to the intra-articular distal femur group in the AO/OTA classification (33-C)
• Common mechanisms: High-energy trauma such as vehicle collisions and falls from height in younger patients, and low-energy falls onto osteoporotic bone in older patients
• Also seen as: A periprosthetic injury above a total knee replacement
• Clinical relevance: Joint involvement raises the risk of stiffness and post-traumatic arthritis, so even nondisplaced patterns are followed closely with imaging
• Coding distinction: S72.46x is supracondylar with intracondylar extension, S72.45x is supracondylar without it, and S72.43x is a fracture of the medial condyle

Set side by side, those subcategories differ only in where the fracture line travels.

Rehabilitation after these fractures runs for months, so the follow-up visits that generate S72.466E claims are often shared between orthopedics and therapy. Teams in sports medicine practices see the same pattern in high-impact injuries and manage the same long recovery arc.

When 7th character E applies

Character E applies at a follow-up visit, once active treatment has ended. The original fracture must have been open, with a Gustilo type I or II wound. Healing must also be progressing normally. All three conditions have to hold. The 7th character is the most frequently miscoded element on traumatic fracture claims.

Per the ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.c, the 7th character reflects the phase of care rather than the type of visit. Active treatment covers the emergency department visit, surgery, and the initial casting or splinting encounter. Everything after that is subsequent, provided no complication is documented.

Two defaults are worth memorizing. A fracture not documented as open or closed is coded as closed. Character D then applies rather than character E, so the index note matters. Open fracture 7th characters for the femur, forearm, tibia and fibula follow the Gustilo classification. The wound grade therefore has to come from the record.

7th character options for S72.466

The closed-fracture counterpart of S72.466E is S72.466D. If the original injury was closed and is now healing normally at follow-up, D is the correct choice. Coders who work across code families will recognize the same 7th character logic elsewhere in the trauma chapter, as in S12.131D.

Why the unspecified side makes S72.466E an audit magnet

S72.466E names no side, and that is the main reason claims carrying it get questioned. The ICD-10-CM guidelines allow an unspecified-laterality code only when the record genuinely does not identify the side. On a follow-up visit, the side is almost always knowable.

By the time a patient reaches a subsequent encounter, three documents already name the leg. The initial encounter note, the imaging report, and the operative report all identify it. A reviewer who sees an unspecified-side code on that timeline reads it as a documentation failure rather than a clinical finding.

That is why S72.466E is best treated as a query trigger, not a resting place. Ask the provider to confirm the side, then move to the specific code. Some payer edits reject unspecified-laterality trauma codes outright, and unspecified codes also weaken the specificity of your quality and risk reporting.

• Record says right: Use S72.464E
• Record says left: Use S72.465E
• Record names no side anywhere: S72.466E is correct, and the query should still be raised
• Both femurs are involved: Assign the right and left codes separately, since no bilateral code exists here

Approximate synonyms and alternate terms for S72.466E

Clinicians rarely write the tabular description word for word. These are the phrasings that commonly map to S72.466E. They hold only where the note supports an open type I or II history, routine healing, and no documented side.

• Nondisplaced intra-articular distal femur fracture, follow-up visit
• Nondisplaced supracondylar femur fracture extending into the knee joint
• Nondisplaced intercondylar femoral fracture, healing routinely
• Nondisplaced AO/OTA 33-C distal femoral fracture, subsequent encounter
• Healing open type I or II distal femur fracture with joint extension

None of these phrasings replaces the provider’s own words. Code from what the record states, and query anything the description leaves open, especially the side and the original wound grade.

Related ICD-10-CM codes for distal femur fractures

The S72.46 subcategory holds six base codes, split by displacement and side. The neighboring subcategories describe different fracture patterns in the same region, and they are the codes most often confused with S72.466.

Per CMS ICD-10-CM coding guidance, payers expect the highest level of specificity the documentation supports. Falling back to S72.409 when the imaging report clearly describes intracondylar extension is a specificity error, and it can trigger a claim edit.

Coding guidelines and documentation requirements for S72.466E

The WHO ICD-10 framework underpins the US clinical modification. Claim submission itself is governed by the ICD-10-CM Official Guidelines, published each year by the National Center for Health Statistics and CMS. For traumatic fractures, the rules below apply directly.

Documentation requirements

The clinical note supporting S72.466E should carry each element below. A missing element weakens the code at audit, and the laterality element decides whether S72.466E is the right code at all.

• Fracture pattern: A supracondylar fracture with a line extending between the condyles into the joint, or an equivalent description
• Displacement status: Imaging or clinical assessment confirming the fragments are in acceptable alignment
• Open or closed at the index encounter: An open wound graded Gustilo type I or II is what supports E rather than D
• Healing status at this visit: An explicit statement that healing is routine, such as callus formation on imaging
• Encounter phase: A reference to the index treatment episode and its date, showing active treatment has ended
• Laterality: If the note names a side, use S72.464E or S72.465E instead

Sequencing and claim submission rules

S72.466E is usually the first-listed diagnosis on a follow-up orthopedic visit. When the same visit covers rehabilitation, the fracture code still sequences first. Additional codes for associated conditions, such as knee stiffness or pain, follow it.

Each coded condition has to be documented and addressed during the encounter, which is a core requirement of medical billing compliance. Claims carrying S72.466E then route through the standard orthopedic pathway on the CMS-1500 or 837P format.

Common coding errors to avoid with S72.466E

Distal femur fracture codes generate a disproportionate share of claim edits, and most of them cluster around the 6th and 7th characters. These are the errors orthopedic coding teams hit most often.

• Treating S72.466E as a medial condyle code: Medial condyle fractures belong to S72.43x, and the nondisplaced left condyle code with 7th character E is S72.435E. Third-party code lists repeat this mislabel, so verify against the tabular list.
• Using S72.466E when the side is documented: Unspecified laterality is for records that name no side. Once the note says right or left, move to S72.464E or S72.465E.
• Dropping the intracondylar extension: A supracondylar fracture that does not reach the joint is coded in S72.45x. Reading the imaging report decides which subcategory applies.
• Using 7th character A at a follow-up visit: A is valid only during active treatment. Once that phase ends, the 7th character moves to D for a closed fracture or E for an open type I or II fracture.
• Confusing D and E: D covers closed fractures healing routinely, while E covers open Gustilo type I or II fractures healing routinely. The answer comes from the initial encounter record, not this visit.
• Submitting S72.466 without a 7th character: The six-character code is not billable, and clearinghouse edits will reject the claim before it reaches the payer.
• Applying G without documentation: Delayed healing needs an explicit note, such as absent callus formation on imaging. G is not a default for a visit where healing status was never recorded.

A working denial management workflow catches these before submission rather than after rejection. Front-end edits cut the rework cost on fracture claims. The malunion and nonunion characters behave the same way on other open fractures, such as S52.042Q.

Billing and reimbursement context for S72.466E

S72.466E pairs with evaluation and management CPT codes for orthopedic follow-up, typically 99213 or 99214 for an established patient. It also pairs with physical therapy CPT codes when the visit includes therapeutic services. The diagnosis code establishes medical necessity, and the CPT code describes what was done.

Supplies and procedures from the index episode do not belong on the follow-up claim. Casting material is billed under A4590 at the encounter where the cast was applied. Soft-tissue coverage of the open wound, reported with a code such as 15271, sits with that episode as well.

Medicare, Medicaid and commercial payers all require full seven-character specificity on fracture claims under HIPAA transaction standards. Confirm the code against the current fiscal year’s tabular list before you submit.

Distal femur fractures generate long rehabilitation episodes, so the diagnosis code has to stay consistent across orthopedics and therapy.

In physical therapy EMR software workflows, that consistency is what keeps continuity of care documentation defensible. Medical billing fundamentals explain where diagnostic code errors enter the revenue cycle in the first place.

How practice management software supports accurate femur fracture coding

In most orthopedic practices, the 7th character is chosen from memory or copied from the last claim. Laterality gets carried forward the same way. That is how an unspecified-side code such as S72.466E survives on a follow-up visit where the imaging report named the leg months earlier.

Practice management software like Pabau closes that loop by keeping the code next to the clinical note that has to support it. The ICD-10-CM catalogue sits inside the record, so the coder selects from valid seven-character codes rather than a spreadsheet. Incomplete or invalid codes are flagged before the claim leaves the practice.

From there, electronic claims via Claim.MD carry the diagnosis fields through on CMS-1500 and 837P submissions, and remittances come back into the same system. Pabau’s claims management software ties that clearinghouse workflow to the client record.

The outcome is fewer reworked fracture claims and a shorter path from follow-up visit to payment. Your coders spend their time on the queries that matter, such as confirming the side, instead of chasing rejections a front-end edit could have caught.

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Conclusion

S72.466E covers one narrow scenario. The fracture is a nondisplaced supracondylar break with intracondylar extension, and the record names no side. The visit is a follow-up after an open type I or II injury that is healing normally. Two of those elements are where claims go wrong. The 6th character invites a laterality query, and the 7th character is the most miscoded element on any fracture claim.

Treat the unspecified side as a question to resolve, not a code to submit. Confirm the original wound grade before you choose between characters D and E.

Both checks belong in a documentation checklist and in front-end claim validation. To see how that validation works in an orthopedic or musculoskeletal practice, book a demo with the Pabau team.

Continue your research

Need to see how electronic claims reach payers? Claim.MD clearinghouse explains how clearinghouse validation works in US medical billing.

Looking for denial prevention specific to fracture claims? Denial codes in billing covers the most common CARC reasons and how to clear them.

Want to verify coverage before the follow-up visit? Insurance eligibility verification outlines real-time eligibility checking workflows.

Need a bedside check for an occult femoral fracture? Patellar pubic percussion test walks through the technique and how to record the result.

Following a knee through months of rehabilitation? Proprioception test sets out how to assess joint position sense as recovery progresses.

Frequently asked questions

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