Open treatment of ankle dislocation requiring repair, internal fixation, or external fixation, with or without percutaneous skeletal fixation

Verified May 8, 2026 · 8 sources ↓

Medicare: $737.83
Work RVU: 11.39
Global, days: 90
Region: Foot & ankle

Drawn from CMSAbosEmednyAcgmeAAPC

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 8 cited references ↓

Specify the type of fixation used — internal (screws, plates, rods), external fixator, or percutaneous pins — by name and count
Document the surgical approach by name (e.g., anterolateral, posteromedial) and which structures were exposed
Identify the specific repair performed: ligamentous repair, capsular repair, or both, with anatomic structures named
Confirm open treatment in the operative note — closed reduction attempts before open treatment should also be noted if performed
Record neurovascular status pre- and post-reduction, given the frequency of associated peroneal or tibial nerve involvement
For modifier 22, document quantified increased complexity: prolonged OR time, complicating factors such as vascular injury or severe soft-tissue compromise

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 50 Bilateral procedure 51 Multiple procedures 58 Staged or related 59 Distinct service 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon AS PA/NP/CNS assistant LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 8 cited references ↓

27848 covers open surgical treatment of an ankle dislocation where the procedure includes repair of ligamentous or capsular structures, internal fixation (plates, screws, rods), or external fixation. This distinguishes it from 27846, which is open treatment without any repair or fixation. The distinction between these two codes is the operative decision to stabilize the joint with hardware or tissue repair — if the surgeon places so much as a single screw or performs a ligament repair, 27848 is the correct code.

The 90-day global period means the surgery date plus 89 subsequent days are covered under one payment. All routine post-op visits, wound checks, suture removal, and cast changes are bundled. Bill anything during the global with modifier 24 (unrelated E/M) or modifier 78 (unplanned return to OR for a related procedure). A staged planned return uses modifier 58.

CPT section guidelines for the 27750–27848 range state that treatment of a fracture and a dislocation at the same ankle is inclusive — do not separately bill a dislocation code when an ankle fracture ORIF code already captures the event. Audit teams flag exactly this combination. When concomitant procedures on a distinctly separate anatomic structure are documented (e.g., syndesmosis repair billed as 27829), use modifier 59 or an X-modifier to support separate billing.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU vs. total RVU

The work RVU (11.39) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (22.09) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	11.39
Practice expense RVU	8.55
Malpractice RVU	2.15
Total RVU	22.09
Medicare national rate	$737.83
Global period	90 days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$737.83
HOPD (APC 5114) Hospital outpatient department	$7,413.38
ASC (PI J8) Ambulatory surgical center (freestanding)	$4,682.29

Common denial reasons

The recurring reasons claims for CPT 27848 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Billing 27848 and a separate ankle fracture ORIF code for the same ankle on the same date — CPT section guidelines for 27750–27848 treat fracture and dislocation treatment as inclusive
Unbundling 27846 and 27848 — these are mutually exclusive; use only the code that matches whether fixation or repair was performed
Missing or vague fixation documentation — operative notes that state 'ankle stabilized' without naming hardware or repair type will not support 27848 over the lower-complexity 27846
Routine post-op visits billed without modifier 24 during the 90-day global, triggering automatic denial
Bilateral modifier 50 applied incorrectly — true bilateral ankle dislocation treated at the same session is exceptionally rare; payers will scrutinize this combination

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 8 cited references ↓

01What is the difference between 27846 and 27848?

27846 is open treatment without any repair or internal/external fixation. 27848 requires at least one of the following: ligament or capsular repair, internal fixation (screw, plate, rod), or external fixation. If hardware goes in or tissue is repaired, use 27848.

02Can I bill 27848 with an ankle fracture ORIF code on the same date?

Generally no. CPT guidelines for the 27750–27848 range state that fracture and dislocation treatment of the same ankle is inclusive. If the ORIF code already captures the operative event, separately billing a dislocation code is a bundling violation. An exception may exist when a second, anatomically distinct procedure is independently documented and supported with a modifier.

03Does the 90-day global include syndesmosis repair or other concomitant procedures?

The global covers the billed procedure and its routine post-op care. If syndesmosis repair (27829) or another distinct procedure was performed at the same session, bill it separately with modifier 51. Post-op visits for unrelated conditions during the global period use modifier 24.

04When should modifier 22 be used with 27848?

Use modifier 22 when the procedure required substantially greater work than typical — for example, severe soft-tissue injury complicating reduction, vascular repair required, or operative time significantly exceeding the norm. The operative note must quantify the added complexity; 'difficult case' alone will not sustain the modifier on audit.

05Is 27848 appropriate for a pediatric patient with an open physis?

27848 can be used for pediatric patients when the procedure description matches. However, if the pathology is primarily a physeal injury, evaluate whether a physeal fracture code better captures the procedure. Document the patient's skeletal maturity and the specific structures treated.

06What modifier applies if the patient returns to the OR unexpectedly within the global period for hardware failure?

Modifier 78 — unplanned return to the OR for a related procedure during the global period. If the return procedure is entirely unrelated to the ankle dislocation treatment, use modifier 79 instead. Do not use 58 for unplanned returns; 58 is for staged or planned subsequent procedures.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira Scribe

Mira's AI scribe captures fixation type and hardware details (screw count, plate name, external fixator configuration), specific ligamentous or capsular repair performed, surgical approach by anatomic name, and intraoperative fluoroscopy confirmation of reduction. This prevents the most common 27848 downcode: an operative note that reads 'ankle dislocation reduced and stabilized' without specifying what hardware was placed or what tissue was repaired — the exact gap auditors exploit to revert the claim to 27846.

See how Mira captures CPT 27848 documentation