ICD-10 code S72.463S: Displaced supracondylar fracture, sequela

Key takeaways

S72.463S is a displaced supracondylar fracture with intracondylar extension of the lower end of an unspecified femur, coded as a sequela

The intracondylar extension is what separates S72.46- from S72.45-, and reciprocal Excludes1 notes stop the two from ever being billed together

The 7th character S means the fracture has healed and the patient is being treated for a lasting effect of it

Code the sequela condition first, then S72.463S as the cause, per ICD-10-CM guideline section I.C.19

The 6th character 3 carries two facts at once, displaced and unspecified side, which is why the nondisplaced twin is S72.466S

Practice management software like Pabau keeps the original fracture record and today’s encounter in one chart, so the sequela link is easy to document

Two ICD-10-CM codes describe a supracondylar femur fracture, and one phrase separates them. If the fracture line runs down into the condyles, you are in S72.46-. If it stops above them, you are in S72.45-. Each family carries an Excludes1 note pointing at the other, so only one of them can ever be billed.

S72.463S sits on the intracondylar-extension side of that split, at the sequela stage. It describes a displaced supracondylar fracture with intracondylar extension of the lower end of an unspecified femur, coded after healing is complete.

Get the split, the sequencing, and the laterality right and this claim is straightforward. Miss any of the three and it comes back.

ICD-10 code S72.463S: definition and billable status

S72.463S is a billable, specific ICD-10-CM diagnosis code valid for reimbursement in HIPAA-covered transactions.

Its full descriptor is “displaced supracondylar fracture with intracondylar extension of lower end of unspecified femur, sequela”. The code sits in the S72 category (fracture of femur), inside the S00-T88 injury chapter of the tabular list.

The 6th character does double duty here, and that trips coders up. The 3 in S72.463S means displaced and unspecified side.

Right is 1, left is 2, and the nondisplaced versions of the same fracture run 4, 5, and 6. So the nondisplaced twin of this code is S72.466S, not a different 7th character.

Unspecified laterality is legitimate, but only when the record genuinely does not state a side. If the note says “right distal femur” anywhere, S72.461S is the correct code.

Reaching for the unspecified option when the chart names the knee is one of the easiest findings for an auditor to prove.

What “with intracondylar extension” actually means

Intracondylar extension means the fracture line does not stop in the metaphysis. It travels down into the condyles and reaches the articular surface of the knee.

That makes it an intra-articular distal femur fracture, which corresponds roughly to a complete articular pattern in the AO/OTA classification, type 33-C.

A supracondylar fracture without that extension stays above the joint surface. It is extra-articular, and it belongs to S72.45-. Both patterns start in the same place, the flared distal end of the thigh bone just above the knee. Only one of them opens the joint.

The distinction matters clinically as well as for coding. An intra-articular pattern usually means articular reconstruction, a longer non-weight-bearing period, and a higher risk of post-traumatic arthritis later on.

Those late effects are exactly the conditions that bring a patient back for a sequela encounter years afterward.

• Phrases that point to S72.46-: “intercondylar split”, “extension into the intercondylar notch”, “intra-articular distal femur fracture”, “articular surface involved”
• Phrases that point to S72.45-: “extra-articular”, “metaphyseal”, “no articular involvement”, or a bare “supracondylar fracture” with nothing said about the joint
• Where the answer usually lives: the CT report, the operative note, or the orthopedic consult, not the emergency department summary

S72.45 or S72.46? The Excludes1 pair that decides the code

S72.45- and S72.46- are mutually exclusive by rule, not just by anatomy. S72.46 carries an Excludes1 note for supracondylar fracture without intracondylar extension, and S72.45 carries the reciprocal note back.

An Excludes1 is a pure excludes, so the two codes cannot appear together on the same claim for the same fracture.

There is one more asymmetry, and it decides most real cases. S72.45- carries the “applicable to” entry for supracondylar fracture of the lower end of the femur, NOS.

A note that says only “supracondylar femur fracture” therefore classifies to S72.45-, not to S72.46-. Intracondylar extension has to be documented to earn this code.

What the 7th character S means in ICD-10-CM fracture codes

Femur fracture codes need a 7th character to say which encounter you are billing. S72.463 offers 16 of them, not the handful most coders picture.

Ten describe open fractures, five describe closed ones, and one covers sequela. The open designations follow the Gustilo open fracture classification, per the note at category level.

S is assigned when the patient is seen for a sequela. That means a condition caused by the injury, appearing after active healing ended. Chronic pain, post-traumatic arthritis, and residual knee stiffness are typical examples.

According to the CMS ICD-10-CM official guidelines for coding and reporting, section I.C.19 governs how those encounters are built. Understanding these ICD-10-CM 7th character conventions across code families prevents systematic denials.

All 16 valid 7th characters for S72.463

Sequela vs subsequent encounter: the critical distinction

A subsequent encounter character (D through R) means the fracture itself is still the active clinical problem. Sequela means the fracture has resolved and left a chronic condition behind.

A patient returning for a cast change gets D as the 7th character. A patient seen six months later for residual knee stiffness gets S, the sequela character.

The sequela condition is coded first. Stiffness of the right knee, M25.661, leads the claim, and S72.463S follows as the code naming the injury that caused it.

That two-code sequencing is required by the official guidelines, and reversing it is the error most often flagged in denial management workflows.

Why open and closed stop mattering at the sequela stage

Every other 7th character on this code splits by wound status, closed or one of the Gustilo open types. S does not. Once the fracture episode is over, ICD-10-CM stops asking whether the bone broke through the skin.

That has a practical effect on documentation. Two patients can land on the same code. One had an open type IIIB fracture, the other a closed one, and both take S72.463S at the sequela stage. The difference shows up in the sequela condition you code first, not in the injury code.

Clinical description: Displaced supracondylar fracture with intracondylar extension

The supracondylar region is the distal metaphysis of the femur, the flared section just above the femoral condyles. A fracture with intracondylar extension starts there and continues down between the condyles into the knee joint.

These injuries cluster in two groups of patients, older adults with osteoporotic bone after a low-energy fall, and younger patients after high-energy trauma.

“Displaced” means the fragments have shifted out of anatomical alignment. It is a coding element in its own right, and ICD-10-CM sets a default.

A fracture not documented as displaced or nondisplaced is coded to displaced. A nondisplaced fracture at the same site, with the same extension and no side stated, would be S72.466S at the sequela stage.

• Fracture site: Distal femur, supracondylar region, with the line extending into the condyles
• Joint status: Intra-articular, since the fracture reaches the articular surface of the knee
• Displacement in S72.463S: Displaced, carried by the 6th character 3
• Laterality in S72.463S: Unspecified, also carried by the 6th character 3
• Encounter type in S72.463S: Sequela, carried by the 7th character S
• Common mechanism: Low-energy falls in older adults, high-energy trauma in younger patients
• Typical sequela conditions: Post-traumatic knee arthritis, joint stiffness, chronic pain, quadriceps weakness, limb-length or alignment change

Code hierarchy and related codes for S72.463S

S72.463S sits inside a structured family, and knowing the ladder helps you find the neighboring code fast when laterality, displacement, or encounter type changes.

The ICD-10 fracture code hierarchy follows the same pattern across injury categories: category, then site and pattern, then the 7th character.

Two Excludes2 notes higher in the ladder are worth knowing, because they redirect fractures that sound similar.

S72.4 excludes fracture of the shaft of the femur (S72.3-) and physeal fracture of the lower end of the femur (S79.1-). At category level, S72 also excludes periprosthetic fracture of a hip implant (M97.0-) and traumatic amputation of the hip and thigh (S78.-).

Documentation requirements for S72.463S

Payers expect the record to support every element the code claims. For S72.463S that means five specificity dimensions: fracture type, intracondylar extension, displacement, anatomical subsite, and encounter context.

Miss one and the payer has grounds to deny or query. The ICD-10-CM documentation standards work the same way across injury categories.

• Fracture type: The note must identify a supracondylar fracture of the distal femur, not a general “knee fracture” or “leg fracture”
• Intracondylar extension: The record has to state that the fracture reaches the condyles or the joint surface. Without that line, the code defaults to S72.45-
• Displacement status: “Displaced” should appear explicitly, even though ICD-10-CM defaults to displaced when neither term is documented
• Anatomical subsite: “Lower end of femur” or “distal femur” distinguishes this from a shaft fracture (S72.3-) or a femoral neck fracture (S72.0-)
• Laterality: Right or left should be named, and if the side truly cannot be established, the reason belongs in the note
• Sequela relationship: The record must link today’s problem to the old fracture. One example is “left knee stiffness after a prior distal femur fracture with intracondylar extension”
• Nature of the sequela: The late effect has to be documented and coded first. Post-traumatic arthritis, chronic pain, and reduced range of motion are typical

Present on admission reporting for S72.463S

S72.463S is exempt from present on admission reporting, so inpatient claims do not need a POA indicator for it. That follows from what the code describes.

A sequela is a lasting effect of an injury that happened before this admission. Asking whether it was present on arrival has no useful answer.

The exemption applies to the fracture code only. The sequela condition you sequence first, such as post-traumatic arthritis or a stiff knee, is usually not exempt and still needs its own indicator. Coders who assign N or U to S72.463S out of habit are answering a question the code set never asks.

Common coding errors with S72.463S

Sequela fracture codes generate more denials than their volume suggests. Five mistakes account for most of them.

• Mixing up S72.45- and S72.46-: These are the two supracondylar variants, without and with intracondylar extension, and each carries an Excludes1 note against the other. They can never both be billed for the same fracture. When the note is silent about the condyles, the NOS entry on S72.45- wins.
• Using D instead of S: D means the fracture is still healing. S means healing finished and the patient is being treated for what it left behind. A knee that stiffened after a fracture healed two years ago takes S.
• Omitting the sequela condition code: S72.463S is sequenced second, after the code for the late effect itself. Leading with the fracture code misrepresents the reason for the visit and inverts the required order.
• Defaulting to unspecified laterality: If the note says “right knee” or “left distal femur”, the 6th character 3 is wrong. Use S72.461S or S72.462S, or query the physician.
• Applying S to an acute encounter: S72.463S never fits the original injury visit or any encounter where the fracture is still being treated. That claim fails medical necessity review.

Billing and reimbursement considerations for S72.463S

On inpatient claims, S72.463S groups to MS-DRG 559, 560, or 561 under MS-DRG v43.0, the version that applies to FY2026.

All three cover aftercare of the musculoskeletal system and connective tissue, split by complication level. DRG 559 is with MCC, 560 is with CC, and 561 is without CC or MCC.

Note the family it lands in, aftercare rather than acute fracture, which is what the sequela character signals to the grouper.

Sequela codes also change the prior authorization picture. The acute episode is over, so authorizations tied to the original surgery do not carry forward. The sequela condition sequenced first can trigger its own, though, particularly for manipulation under anesthesia or revision surgery.

For practices submitting claims through a clearinghouse, the Claim.MD clearinghouse integration in Pabau routes claims like this one to more than 4,000 US payers.

Submission runs on 837P transactions, and the 835 remittances come back into the same record. That keeps electronic remittance advice processing in one place. Knowing how submitting a clean claim interacts with sequela sequencing rules is what lifts first-pass acceptance.

When S72.463S does draw a denial, the reason codes usually point to sequencing or to medical necessity for the stated late effect. Reading the denial codes in medical billing for musculoskeletal claims tells you which of the two it is. The corrected claim then goes out right the second time.

Where to verify S72.463S and its ICD-9-CM crosswalk

Verify the descriptor and its Excludes1 notes in the official source before you appeal anything. The CDC and NCHS ICD-10-CM web tool carries the tabular list and alphabetic index for every edition. The AAPC Codify lookup and ICD List mirror the official code set and are quicker to search.

For legacy records and older data sets, the 2026 general equivalence mappings convert S72.463S approximately to ICD-9-CM 905.4, late effect of fracture of lower extremities.

The ICD-9 code carries none of the detail this one does. It says nothing about the femur, the condyles, displacement, or the side, which is worth remembering when you compare fracture volumes across the transition.

How Pabau keeps sequela detail attached to the claim

Sequela coding asks more of a chart than an acute fracture does. To assign S72.463S you need the original injury date, confirmation that healing finished, the intracondylar extension, the side, and the late effect being treated today. Some of that lives in a note written years ago, by a different provider.

Pabau, an all-in-one practice management system, keeps that history in a single patient record. Past encounters, treatment notes, imaging attachments, and previously coded diagnoses sit next to today’s visit.

The coder can read the whole story without opening a second system. That is the difference between documenting a sequela link in a minute and chasing it for an afternoon.

From there, claims management software sends the encounter straight to the clearinghouse. Remittances land back in the same record, so you can see which sequela claims paid and which came back.

For orthopedic and rehabilitation practices running high volumes of post-fracture follow-up, that feedback loop is what turns a denial pattern into a fix.

Physical therapy practices see S72.463S often, usually as the secondary code supporting a rehabilitation claim.

Tools built for physical therapy practice management keep the clinical note and the billing detail in one workflow. The link between the old fracture and today’s treatment gets captured as the therapist writes, instead of being reconstructed at month end.

Reduce coding errors across your orthopedic or physical therapy practice

Pabau’s integrated practice management platform helps orthopedic and rehabilitation clinics document fracture encounters accurately. Submit claims through verified clearinghouse partners, and track denial patterns before they become revenue problems.

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Conclusion

S72.463S is precise about four things at once: a supracondylar fracture, extension into the condyles, displacement, and a sequela encounter with the side left unstated.

The intracondylar extension is the element most likely to be missing from the note, and without it the claim belongs to S72.45-. After that, the recurring failures are sequencing the two codes backwards and settling for unspecified laterality the chart could have supplied.

Practices handling post-fracture care at volume need the old injury record within reach at the new encounter. That is a records problem before it is a billing problem, and it is worth reading how revenue cycle management connects the two.

To see how Pabau keeps the fracture history and the claim in the same place, book a demo with the team.

Continue your research

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Need to understand clearinghouse claim submission? How medical claims clearinghouses work explains the 837P submission pathway and how payer routing affects fracture sequela claims.

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