Lengthening or shortening of multiple tendons in the leg or ankle through a single incision to correct contracture or deformity.

Verified May 8, 2026 · 8 sources ↓

Medicare: $503.02
Work RVU: 7.56
Global, days: 90
Region: Foot & ankle

Drawn from CMSAAPCMdclarityFindacodeAAOS

Documentation requirements

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

Source · Editorial brief grounded in 8 cited references ↓

Name each tendon operated on and confirm all were accessed through the same incision — generic language like 'multiple tendons addressed' is insufficient.
Specify whether each tendon was lengthened or shortened and describe the technique (e.g., Z-lengthening, recession, step-cut).
Document the underlying diagnosis driving the procedure — contracture, spasticity, post-traumatic deformity, or congenital condition — and its ICD-10 code.
Record the incision location and approach in the operative note; if separate incisions were used for separate tendon groups, document each distinctly to support any additional billing units.
Include pre-operative range-of-motion or functional deficit findings to establish medical necessity for the revision procedure.
Note laterality (left, right, or bilateral) explicitly in the operative report header and body.

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 58 Staged or related 59 Distinct service 76 Repeat, same 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 8 cited references ↓

CPT 27686 covers surgical revision of multiple lower leg or ankle tendons accessed through the same incision. The surgeon lengthens tendons that are abnormally shortened and causing contracture, or shortens tendons that are overly lax and functionally insufficient. The goal is to restore mechanical balance and relieve pain caused by congenital or acquired deformity — common clinical scenarios include equinus contracture correction via gastrocnemius recession combined with soleus tenotomy, or multi-tendon balancing in cerebral palsy and post-traumatic deformity cases.

The code's descriptor specifies "multiple tendons" and "through same incision" — both are load-bearing documentation elements. If additional incisions are made to address separate tendon groups, each distinct incision site may support a separate billing unit. That interpretation has generated forum debate; confirm with your payer and verify NCCI edits before billing multiple units. The 90-day global period means all routine post-op management through day 90 is bundled — use modifier 24 or 25 for unrelated E/M services in that window, and modifier 78 if the patient returns to the OR for a related complication.

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 (7.56) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (15.06) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	7.56
Practice expense RVU	6.28
Malpractice RVU	1.22
Total RVU	15.06
Medicare national rate	$503.02
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	$503.02
HOPD (APC 5113) Hospital outpatient department	$3,342.87
ASC (PI A2) Ambulatory surgical center (freestanding)	$1,644.87

Common denial reasons

The recurring reasons claims for CPT 27686 get rejected.

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

Medical necessity not established — op note lacks pre-op functional deficits or conservative treatment failure documentation.
Bundling conflict when 27686 is billed same-day with a single-tendon lengthening or repair code without modifier 59 or XS to distinguish the service.
Laterality mismatch between the operative report and the claim — missing or wrong RT/LT modifier triggers automated denial.
Global period conflict — post-op E/M billed without modifier 24 or 25 during the 90-day window is automatically bundled and denied.
Insufficient tendon specificity in the operative note — auditors deny 27686 when the report doesn't confirm that multiple tendons were revised through the same incision.

Frequently asked questions

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

01Can 27686 be billed per incision if the surgeon made separate incisions for different tendon groups?

The descriptor says 'through same incision' — each separate incision site could theoretically support its own unit, but NCCI edits and payer policies vary. Document each incision distinctly and verify with your payer before billing multiple units.

02What's the difference between 27686 and 27685?

27685 covers lengthening or shortening of a single tendon. 27686 applies when multiple tendons are addressed through the same incision. Always bill the highest-RVU code in the primary position and append modifier 51 to secondary procedures.

03Is a gastrocnemius recession with soleus tenotomy reported under 27686?

When both are performed through the same incision, 27686 is the appropriate code — this is one of the most common clinical scenarios the code covers. If performed through separate incisions, coding changes; document the approach carefully.

04How does the 90-day global period affect billing for post-op complications?

Unplanned return to the OR for a related complication within 90 days uses modifier 78. An unrelated procedure during the global period uses modifier 79. E/M visits for unrelated conditions in the global window need modifier 24.

05When is modifier 50 appropriate for 27686?

Use modifier 50 only when the identical multi-tendon revision is performed on both legs during the same operative session. Document bilateral findings and bilateral surgical intent in the operative note.

06Does 27686 require a specific ICD-10 diagnosis code to pass medical necessity review?

Payers expect a diagnosis reflecting the structural or functional deficit — contracture, spastic deformity, or post-traumatic deformity codes are the standard drivers. A vague 'leg pain' ICD-10 without a structural finding is a common trigger for medical necessity denial.

Sources & references

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

Mira Scribe

Mira's AI scribe captures the specific tendons revised, the technique used for each (lengthening vs. shortening), the incision location, and the underlying diagnosis from surgeon dictation. It flags operative notes that reference 'multiple tendons' without naming them — the most common documentation gap that triggers post-payment audit clawbacks on 27686.

See how Mira captures CPT 27686 documentation