ICD-10 code S72.052S: Unspecified fracture of head of left femur, sequela

Key takeaways

ICD-10 code S72.052S means unspecified fracture of head of left femur, sequela, and it is billable

Unspecified describes the fracture pattern, not the site or the side, because subcategory S72.05 carries no displacement detail

A documented nondisplaced articular fracture of the left femoral head is a different code: S72.065S

The 7th character S marks a sequela encounter, and it is one of 16 valid 7th characters for the stem code S72.052

Code the residual condition first and sequence S72.052S after it, per ICD-10-CM guideline Section I.B.10

Practice management software like Pabau pre-fills claim forms from the patient record and checks required fields before submission

Most femoral head fracture coding errors surface after the acute phase, when the claim is for what the fracture left behind. ICD-10 code S72.052S covers that encounter: unspecified fracture of head of left femur, sequela. The word “unspecified” points at the fracture pattern, not the site or the side.

Read the code as “nondisplaced” and you will reach for the wrong subcategory on every claim. Below are the code’s billable status, all 16 valid 7th characters, the line between sequela and subsequent encounter, and the documentation an auditor expects.

ICD-10 code S72.052S: definition and billable status

ICD-10 code S72.052S is a billable ICD-10-CM diagnosis code valid for reimbursement submission. The full clinical description is: Unspecified fracture of head of left femur, sequela. The code sits in chapter S00-T88 (Injury, Poisoning and Certain Other Consequences of External Causes). It belongs to the S70-S79 block for injuries to the hip and thigh.

The CMS ICD-10 codes page publishes the annual files that confirm billable status. For claims management software users, S72.052S can be submitted on CMS-1500 and 837P electronic claims once it is paired with the residual condition code.

Clinical description: unspecified fracture of head of left femur, sequela

S72.052S describes a healed fracture of the left femoral head that the record never described any further. The operative note or imaging report named the site and the side. It did not call the fracture articular, and it did not state whether the fragments were displaced. ICD-10-CM has a subcategory for exactly that situation, and S72.05 is it.

The femoral head is the ball-shaped top of the femur that fits into the acetabulum to form the hip joint. A fracture there is anatomically distinct from femoral neck and intertrochanteric fractures, which sit lower on the proximal femur.

• Unspecified: Subcategory S72.05 offers no displaced or nondisplaced choice. Its only children are the three laterality options, so the stem code carries no statement about the fracture pattern.
• Head of femur: The fracture site is the femoral head itself, inside the hip joint capsule. Neck, pertrochanteric, and shaft fractures belong to other S72 subcategories.
• Left femur: Laterality sits in the 6th character. Left is 2 (S72.052x), right is 1 (S72.051x), and unspecified is 9 (S72.059x).
• Sequela: The encounter treats a late effect or residual condition caused by the original fracture, after the acute healing phase has ended.

Sequelae of femoral head fractures commonly include post-traumatic arthritis, avascular necrosis, chronic pain, and reduced range of motion. Each residual condition needs its own diagnosis code, sequenced before S72.052S on the claim.

Femoral head fracture sequelae often involve extended rehabilitation episodes. Practices treating those patients can find workflow context in physical therapy practice management resources.

S72.052S vs S72.065S: matching the code to the documented pattern

Displacement changes the subcategory, not the 7th character. Femoral head fractures split across two neighboring subcategories, and the wording in the note decides which one you use. S72.05 holds the unspecified fractures, while S72.06 holds the articular fractures and their displaced and nondisplaced options.

Two defaults are worth keeping straight. The S72 tabular note codes a fracture as displaced when the record does not say displaced or nondisplaced. It codes a fracture as closed when the record is silent on open or closed. Neither default sends you to S72.05. That subcategory is reserved for a femoral head fracture the record never described as articular.

When the detail probably exists somewhere, query the physician rather than defaulting. An operative report or a CT read usually states the fracture pattern, and a one-line clarification moves the claim to a more specific code.

Understanding the 7th character in S72.052S

The stem code S72.052 is not billable on its own. A 7th character is required, and it records the encounter type, the healing status, and whether the fracture was open or closed. Sixteen valid 7th characters apply to S72.052, because S72 splits its subsequent encounters by Gustilo open fracture type as well as by healing.

The six characters below cover closed fractures. They handle most femoral head sequela work, since a fracture not documented as open is coded as closed.

The remaining ten characters apply when the fracture was documented as open. Gustilo type I and II injuries take one character, and types IIIA, IIIB, and IIIC share another at each healing stage.

Sequela has no open or closed variant. The late-effect encounter takes S whatever the original fracture looked like. Verify current assignments against the CDC/NCHS ICD-10-CM web tool, which mirrors the official tabular list each fiscal year.

ICD-10 code hierarchy for S72.052S

S72.052S sits at the most granular level of the S72 fracture-of-femur category. Reading the lineage from the top shows exactly where the fracture detail stops. Knowing ICD-10 traumatic injury coding hierarchies also helps when auditing claims for specificity.

• S00-T88 – Injury, poisoning and certain other consequences of external causes (chapter level)
• S70-S79 – Injuries to the hip and thigh (block level)
• S72 – Fracture of femur (category level; covers head, neck, shaft, and distal fractures)
• S72.0 – Fracture of head and neck of femur (subcategory)
• S72.05 – Unspecified fracture of head of femur (5-character subcategory)
• S72.052 – Unspecified fracture of head of left femur (6-character, non-billable stem)
• S72.052S – Unspecified fracture of head of left femur, sequela (7-character, billable)

Notice what the 7th character does not do. It adds no fracture detail at all, since S only records that the encounter treats a late effect. The stem code already fixes every piece of clinical specificity. That is why the displaced and nondisplaced options sit one subcategory across, in S72.06, instead of in the 7th character.

When to use S72.052S vs other S72.052 encounter codes

This is where most billing errors occur. Coders frequently submit S72.052D (subsequent encounter, routine healing) when the patient is presenting for a residual condition after the fracture has healed. Those are two different clinical situations, and they take different codes.

Work through this checklist before assigning any S72.052 encounter code. For deeper context on ICD-10 sequela coding decisions across diagnostic categories, the same framework applies.

1. Is the fracture still in the active treatment phase? If yes, use A for the first visit, or D and G for routine or delayed healing at follow-up. Do not use S.
2. Has the fracture healed or reached maximum medical improvement? If yes, move to question 3.
3. Is the patient presenting for a condition caused by the original fracture? Post-traumatic arthritis, avascular necrosis, or chronic hip pain all qualify. If yes, use S, and put the residual condition code first on the claim.
4. Has the fracture failed to heal properly? Nonunion takes K and malunion takes P. Both differ from sequela, because the fracture itself has not fully resolved.
5. Is healing delayed but still ongoing? Use G. Delayed healing means the fracture is still in process, not that a complication has resulted from it.

The critical distinction is simple. Sequela (S) means the original fracture has resolved and the patient is being treated for something it left behind. A subsequent encounter (D, G, K, or P) means the fracture is still the clinical problem being managed.

Documentation requirements for S72.052S

Using S72.052S requires documentation that supports every element of the code description. Auditors reviewing hip fracture claims look for four elements before they accept a sequela encounter. Practices can review medical billing compliance frameworks to see how thin documentation triggers post-payment audits.

• Laterality confirmed: The record must state “left” hip or “left” femur. “Hip fracture” without a side does not support S72.052x coding.
• Fracture site and pattern recorded: S72.052S fits a femoral head fracture the record does not describe as articular. If the note documents a displaced or nondisplaced articular fracture, code from S72.06 instead.
• Sequela relationship established: The physician must link the current condition to the prior fracture. Wording such as “post-traumatic arthritis of the left hip secondary to prior femoral head fracture” satisfies this.
• Residual condition identified: The specific residual condition must be documented and coded separately. Sequence it before S72.052S, per Section I.B.10 of the ICD-10-CM documentation standards.

Per the ICD-10-CM Official Guidelines for Coding and Reporting, sequela coding takes two codes: one for the residual condition and one for the cause, S72.052S. The sequela code is never listed first. Missing the residual condition code is the most common reason these claims fail an audit review.

Related ICD-10 codes for femoral head fractures

S72.052S sits inside a family of femoral head fracture codes. Coders working hip fracture claims need the sibling and adjacent codes to pick the right level of specificity. A Claim.MD clearinghouse integration submits the codes your team selects. Built-in ICD-10-CM lookup libraries make each description easy to check before the claim goes out.

Use the AAPC Codify ICD-10-CM lookup to confirm current descriptions across the femoral fracture family. A femoral fracture sequela claim needs both the residual condition code and S72.052S, in that order. For the wider checklist, read our guide to clean claim submission.

ICD-10 hip fracture coding: S72 category overview

S72.052S sits within a large category covering the full range of femur fractures. Knowing where femoral head fractures fall inside S72 keeps claims out of adjacent subcategories.

Femoral head fractures are the least common hip fracture type in older patients. They show up more often after high-energy trauma and posterior hip dislocations in younger patients. That is one reason the documentation tends to be surgical rather than clinical.

Reimbursement, POA, and code history for S72.052S

On the inpatient side, S72.052S groups to the aftercare DRGs rather than an acute fracture DRG. That reflects what the encounter treats: the late effect, not the fracture.

• MS-DRG grouping: S72.052S falls into DRG 559, 560, or 561, aftercare of the musculoskeletal system and connective tissue, split by mcc, cc, or neither.
• POA reporting: The code appears on the ICD-10-CM present on admission exempt list, so acute care hospitals report no POA indicator for it.
• Code history: S72.052S has been valid since October 1, 2015, and it has carried the same description through the FY2026 update effective October 1, 2025.

DRG assignment shifts with each annual grouper release, so confirm the current mapping before you rely on it for reimbursement modeling. The ICD List DRG grouper tracks those updates by code.

Common coding errors and tips for S72.052S

Femoral head fracture sequela claims attract a predictable set of errors. They show up again and again in claim denial management queues, and most can be caught at the point of coding.

• Reading S72.052S as a nondisplaced fracture code: It carries no displacement detail. When the record documents a nondisplaced articular fracture of the left femoral head, the sequela code is S72.065S.
• Submitting S72.052 without a 7th character: The stem code is not billable and payers reject it on sight. Always append a 7th character, which is S for a sequela encounter.
• Confusing sequela with subsequent encounter: Do not reach for the sequela character while the fracture is still healing or being actively managed. Sequela applies only after the fracture has resolved.
• Missing the residual condition code: S72.052S must follow the code for the residual condition, such as M16.52 for unilateral post-traumatic osteoarthritis of the left hip. Submitting S72.052S alone breaks the sequencing guideline and usually draws a clinical edit denial.
• Laterality errors: Right femur (S72.051x) and left femur (S72.052x) are different codes. Confirm the side in the operative or physician note, not in the diagnosis header.
• Using K or P after the fracture has healed: Nonunion and malunion mean the fracture is still the clinical problem. Once it has resolved and the patient returns with a complication, the encounter is a sequela.
• Treating the sequela code as primary: The residual condition is always sequenced first. Putting S72.052S in position 1 is a sequencing error that invalidates the claim.

Coding judgment stays with your team, but the mechanics around it can be automated. Practices submitting fracture claims electronically can route them through Pabau’s medical claims clearinghouse workflow. The claim form arrives pre-filled from the patient record, and required fields are checked before the claim can be sent. Understanding medical billing fundamentals helps teams build a consistent pre-submission review across every fracture code family.

How Pabau supports fracture sequela coding and claims

In most practices, a sequela claim gets built twice. The coder reads the note in the record, then retypes the diagnosis codes into a separate billing tool. A missing membership number or authorization comes back as a rejection days later.

Practice management software like Pabau keeps that work in one place. The claim form is pre-filled from the patient record. The service’s procedure code lands on the charge line, and the diagnosis slots are seeded from the recorded problem list. Built-in ICD-10-CM and CPT/HCPCS lookup libraries hold more than 20,000 codes, refreshed with each official release. Your coder can search S72.052S without leaving the claim.

Required-field validation then holds the claim until the entries a payer insists on are complete. US practices submit through the Claim.MD integration, with real-time eligibility checks, claim status tracking, and ERA remittance posting in the same screen. The coding calls stay yours, so your team spends its review time on sequencing judgment rather than on retyping.

Streamline your ICD-10 billing workflows

Pabau pre-fills claim forms from the patient record and gives your coders a built-in ICD-10-CM and CPT lookup library. Required fields are checked before a claim can be sent. Submit through Claim.MD without switching systems.

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Conclusion

S72.052S is the late-effect code for a fracture of the head of the left femur that the record leaves unspecified. Get that word right and the rest follows. The description makes no displacement claim, S72.065S covers a documented nondisplaced articular fracture, and the residual condition is sequenced first.

The guideline itself is clear. What blurs it is documentation that never connects the current condition to the original injury. A query is usually faster than a resubmission. Pabau’s medical billing compliance tools support that work with record-based pre-fill, code lookup, and required-field checks before submission. To see how Pabau handles diagnostic code workflows in your practice, book a demo.

Continue your research

Need a framework for coding traumatic injury late effects? ICD-10 traumatic injury coding reference covers sequela and encounter type rules for acute injury codes.

Submitting fracture claims through a clearinghouse? Medical claims clearinghouse workflow explains how electronic claim routing works for diagnostic code submissions.

Want to reduce denial rates on complex fracture encounters? Claim denial management covers the most common denial patterns for injury-related ICD-10 codes.

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