Surgical incision into the cortex of a hand or finger bone to treat osteomyelitis or another bone infection.

Verified May 8, 2026 · 5 sources ↓

Medicare: $526.06
Work RVU: 6.46
Global, days: 90
Region: Hand

Drawn from CMSAAPCCgsmedicareAAOS

Documentation requirements

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

Source · Editorial brief grounded in 5 cited references ↓

Operative note must explicitly state that the bone cortex was incised — 'went down to bone' or equivalent; notation of only soft-tissue incision is insufficient.
Specify which bone was treated (e.g., proximal phalanx of index finger, third metacarpal) — generic 'hand bone' language invites audits.
Document the clinical indication driving the procedure, such as confirmed or suspected osteomyelitis with imaging or lab correlation.
Record laterality (right vs. left hand and specific digit/ray) in both the pre-op diagnosis and operative report.
If cultures were obtained intraoperatively, document specimen collection and submission — supports medical necessity and ICD-10 specificity.
For modifier 22 claims, include a detailed explanation of factors that substantially increased operative complexity beyond the typical cortical incision.

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 LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

CPT 26034 describes a procedure in which the surgeon incises the bone cortex of a hand or finger bone to address infection — most commonly osteomyelitis. The operative intent is direct decompression of the infected bone, which distinguishes this code from soft-tissue drainage codes. The approach requires reaching and incising the periosteum and cortical bone, not merely draining overlying soft tissue. If the operative note doesn't document that the surgeon went down to bone, 26034 won't hold up on audit.

The code carries a 90-day global period. All routine follow-up, wound checks, and dressing changes through day 90 are bundled. If you need to bill a separately identifiable E/M during that window — say, for a new or unrelated problem — append modifier 24. If the decision to operate was made at the same visit as a major surgical case, modifier 57 applies to the E/M, not to 26034 itself. Staged or planned return procedures during the global use modifier 58; unplanned returns for a related complication use modifier 78.

This code is billed by Plastic and Reconstructive Surgery and Orthopedic Surgery practices. Laterality modifiers (LT/RT) apply when a single digit or hand is specified. For bilateral same-day procedures, hospitals bill two claim lines with LT and RT; physicians bill with modifier 50 per CMS NCCI policy.

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 (6.46) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (15.75) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	6.46
Practice expense RVU	8.03
Malpractice RVU	1.26
Total RVU	15.75
Medicare national rate	$526.06
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	$526.06
HOPD (APC 5112) Hospital outpatient department	$1,642.82
ASC (PI A2) Ambulatory surgical center (freestanding)	$872.87

Common denial reasons

The recurring reasons claims for CPT 26034 get rejected.

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

Operative note documents only soft-tissue or subcutaneous drainage without confirming cortical bone incision — payers recode to a lower-valued I&D code.
Missing or non-specific laterality in the claim or supporting documentation triggers NCCI edits and MAC review.
Unbundling of E/M services within the 90-day global period without modifier 24, resulting in denial of the E/M charge.
ICD-10 diagnosis code doesn't support bone infection (e.g., superficial abscess code used instead of osteomyelitis), causing medical necessity denial.
Billing 26034 alongside a component soft-tissue drainage code for the same digit on the same date without a modifier to establish distinctness.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01What separates 26034 from a simple hand abscess drainage code?

The defining element is cortical bone incision. Codes for abscess drainage (e.g., 26010, 26011) stop at the soft tissue. 26034 requires the surgeon to reach and incise the bone cortex. If the op note doesn't confirm that, auditors will recode to the lower I&D code.

02Can I bill an E/M on the same day as 26034?

Only if it's a significant and separately identifiable service unrelated to the decision to perform the cortical incision. Append modifier 25 to the E/M. The fact that the patient is new is not by itself sufficient justification per CMS NCCI Chapter 4 guidance.

03How do I handle a planned staged debridement during the 90-day global?

Use modifier 58 on the return procedure. This indicates a staged or related procedure planned at the time of the original surgery, resets the global period clock, and prevents a bundling denial. Reserve modifier 78 for unplanned returns to the OR for a complication related to the original procedure.

04Is laterality required on the claim?

Yes. Append LT or RT to identify the operative hand. For bilateral same-day procedures, physicians bill with modifier 50; ASCs bill two claim lines using LT and RT on separate lines per CMS NCCI policy.

05When is modifier 22 appropriate for 26034?

When the work required substantially exceeds the typical cortical incision — for example, severely scarred tissue from prior infection, extensive debridement beyond what the code typically envisions, or prolonged operative time. Documentation must quantify what made the case harder, not just assert it was difficult.

06What ICD-10 codes support medical necessity for 26034?

Osteomyelitis codes (M86 category, specify acute vs. chronic, organism if known) are the primary drivers. Use the most specific code available — site, acuity, and causative organism subclassifications all matter. A generic abscess or cellulitis code without bone-level pathology documented will trigger medical necessity denials.

Sources & references

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

Mira Scribe

Mira's AI scribe captures the surgeon's dictated confirmation that the incision extended through periosteum to cortical bone, the specific bone and digit treated, and laterality — the three elements most likely to trigger a recode or denial. That documentation lands in the operative note before the claim is built, eliminating the back-and-forth that follows a 'soft tissue only' audit flag.

See how Mira captures CPT 26034 documentation