Closed treatment of a distal fibular (lateral malleolus) fracture requiring manual reduction and realignment of the displaced bone fragment.

Verified May 8, 2026 · 7 sources ↓

Medicare: $498.68
Work RVU: 4.52
Global, days: 90
Region: Foot & ankle

Drawn from AAPCMedicalbillgurusCMSNIHFindacode

Documentation requirements

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

Source · Editorial brief grounded in 7 cited references ↓

Confirm and document displacement of the distal fibula fracture — manipulation (reduction) must be explicitly described to support 27788 over 27786.
Specify 'lateral malleolus' or 'distal fibula' as the fracture site; vague anatomic terms create audit exposure.
Document the reduction technique, post-reduction alignment, and the type of immobilization applied (cast, splint, CAM walker).
If a concomitant fracture (e.g., medial malleolus, distal tibia) was also treated, document separate manipulation efforts for each anatomic site.
Include pre- and post-reduction radiographic confirmation of alignment in the clinical note or operative report.
Record the treating physician's identity and any assistant involvement if modifier 80 or AS is appended.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 24 Unrelated E/M during global 25 Significant separate E/M 50 Bilateral procedure 51 Multiple procedures 57 Decision for surgery 58 Staged or related 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon AS PA/NP/CNS assistant LT Left side RT Right side XS Separate structure

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

27788 covers closed treatment of a distal fibula fracture — the lateral malleolus — when manipulation is required to reduce a displaced fragment. The key distinction from 27786 is displacement: if the fracture is displaced and the physician performs a reduction, bill 27788. If the fracture is non-displaced and treatment is immobilization only (cast, CAM walker, splint, or orthosis), bill 27786 instead.

Surgeons frequently document this injury as a 'distal fibula fracture' rather than 'lateral malleolus fracture.' Both terms map to the same code series (27786–27792), so the fracture location isn't the issue — the treatment method is. Closed with manipulation = 27788. Open or percutaneous fixation = 27792, regardless of whether a closed reduction was also attempted.

The 90-day global period covers the reduction, the post-reduction cast or splint application, and all routine follow-up through day 90. Casting and strapping codes (e.g., 29581) are bundled and cannot be billed separately per NCCI policy. If a concomitant distal tibia fracture is treated in the same session, the tibial fracture code (e.g., 27825) may be separately reportable with modifier 59 when distinct manipulation is documented for each bone.

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 (4.52) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (14.93) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	4.52
Practice expense RVU	9.42
Malpractice RVU	0.99
Total RVU	14.93
Medicare national rate	$498.68
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	$498.68
HOPD (APC 5111) Hospital outpatient department	$252.01
ASC (PI A2) Ambulatory surgical center (freestanding)	$135.54

Common denial reasons

The recurring reasons claims for CPT 27788 get rejected.

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

Upcoding to 27788 when documentation doesn't describe displacement or a reduction maneuver — payers downcode to 27786.
Billing a casting or strapping code (e.g., 29581) alongside 27788; NCCI bundles cast/splint application into all fracture treatment codes.
Mismatched ICD-10 diagnosis code (e.g., non-displaced fracture code paired with the manipulation CPT), triggering an automated mismatch denial.
Using 27788 when the surgeon performed percutaneous fixation — that work belongs under 27792, and the distinction between closed and open/percutaneous is frequently audited.
Missing laterality modifier (LT or RT) on payers that require it, resulting in claim rejection or delayed payment.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01What separates 27788 from 27786?

Displacement and reduction. 27786 is for non-displaced lateral malleolus fractures treated with immobilization only. 27788 requires that the fracture was displaced and the physician performed a manual reduction. If there's no reduction documented, use 27786.

02Can I bill a casting code (e.g., 29581) separately when I apply a splint after the reduction?

No. Per NCCI policy, all fracture treatment CPT codes include the initial casting, splinting, or strapping. Billing a separate casting code alongside 27788 will trigger an NCCI bundle denial. No modifier overrides this edit.

03The surgeon documented 'distal fibula fracture' — is that sufficient to use 27788?

'Distal fibula' and 'lateral malleolus' are anatomically equivalent for coding purposes. The site isn't the issue — confirm the note also documents displacement and a reduction maneuver before assigning 27788 over 27786.

04The patient also had a distal tibia fracture treated the same day. Can I bill both fracture codes?

Yes, if the surgeon performed separate manipulation for each bone and documentation supports it. Append modifier 59 (or XS for distinct anatomic site) to the secondary fracture code. Modifier 51 may also apply depending on payer. Don't bill both without distinct documentation for each reduction.

05What modifier do I use if the same fracture needs re-manipulation during the 90-day global?

Use modifier 76 (repeat procedure by same physician) or 77 (repeat by a different physician). Document the clinical reason the additional manipulation was medically necessary — payers will scrutinize repeat reduction claims within the global period.

06Should I use modifier 78 or 79 if the patient returns to the OR during the global period?

Modifier 78 is for an unplanned return to the OR for a complication or issue related to the original fracture treatment. Modifier 79 is for a completely unrelated procedure performed during the global period. Don't invert them — misuse of 78 vs. 79 is a common audit finding.

07Does bilateral lateral malleolus fracture treatment qualify for modifier 50?

Yes, if both ankles are treated with manipulation in the same session, append modifier 50. Bilateral traumatic lateral malleolus fractures are uncommon, so expect payer scrutiny — documentation must clearly identify displacement and reduction for each side.

Sources & references

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

Mira AI Scribe

Mira's AI scribe captures the fracture site (distal fibula/lateral malleolus), displacement status, reduction technique, post-reduction alignment, and immobilization type directly from physician dictation. This prevents the most common 27788 denial: submitting the manipulation code without documentation that a displaced fracture actually required reduction. The scribe also flags when concomitant fractures are mentioned, prompting the coder to evaluate whether a separate fracture code with modifier 59 is warranted.

See how Mira captures CPT 27788 documentation