Application of a long or short leg cast for clubfoot correction, with manual manipulation or molding of the foot into improved alignment.

Verified May 8, 2026 · 6 sources ↓

Medicare: $145.63
Work RVU: 2.03
Global, days: 0
Region: Foot & ankle

Drawn from CMSAAPCAAOSGenhealth

Documentation requirements

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

Source · Editorial brief grounded in 6 cited references ↓

Diagnosis of clubfoot (congenital or acquired) with ICD-10 code supporting medical necessity
Explicit documentation of manual manipulation or molding performed during the visit, not just cast application
Specify long leg vs. short leg cast construction and clinical rationale for choice
Laterality documented — left, right, or bilateral — to support modifier use
Cast material used (plaster vs. fiberglass) for HCPCS supply code support
Sequential visit number within the correction series and treatment plan milestones

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 50 Bilateral procedure 52 Reduced services 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician LT Left side RT Right side XS Separate structure

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 29450 covers the casting step of serial clubfoot treatment — the provider manually stretches and repositions the foot, applies protective padding, then wraps and molds a plaster or fiberglass cast (long or short leg) to hold the corrected position. This is repeated at roughly weekly intervals throughout a correction series, most commonly using the Ponseti method. Each visit generates a new, separately billable 29450 because the 000-day global period means no global window carries over between sessions.

The code applies to both congenital clubfoot and acquired deformity (e.g., post-polio). Either long or short leg cast construction is captured under the same code — document which type was used and why. When a percutaneous Achilles tenotomy (27606) is performed in the same session, NCCI bundling rules govern whether 29450 is separately payable; check current edits before appending modifier 59 or an X-modifier.

Podiatry accounts for the dominant billing share in CMS PUF data, but pediatric orthopedic surgeons and orthopedic specialists also bill this code. Because each casting episode is an independent encounter with a 000 global, weekly recasting does not require staged-procedure modifiers — but bilateral casting does require modifier 50.

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 (2.03) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (4.36) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	2.03
Practice expense RVU	2.12
Malpractice RVU	0.21
Total RVU	4.36
Medicare national rate	$145.63
Global period	0 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	$145.63
HOPD (APC 5101) Hospital outpatient department	$166.02
ASC (PI P3) Ambulatory surgical center (freestanding)	$71.16

Common denial reasons

The recurring reasons claims for CPT 29450 get rejected.

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

Missing documentation of manipulation or molding — payers deny when notes reflect passive casting only without active repositioning
Bilateral casting billed as two units without modifier 50, triggering MUE edits
29450 bundled into the global period of same-day surgical procedure (e.g., 27606) without NCCI edit review and appropriate unbundling modifier
Lack of a documented treatment plan or series rationale when billing weekly recasting over multiple dates of service
ICD-10 specificity mismatch — unspecified foot deformity codes flagged when a congenital clubfoot code (Q66.0x) is available and more accurate

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01Does 29450 have a global period that affects weekly recasting?

No. 29450 carries a 000-day global period, so each weekly casting session is independently billable. You do not need modifier 58 or 79 between recasting visits — just bill 29450 at each encounter with the appropriate date of service.

02How do you bill bilateral clubfoot casting in the same session?

Append modifier 50 to 29450 for bilateral same-session casting. Some payers want LT and RT on two line items instead — verify payer preference before submission. Don't bill two units without a modifier, as that triggers MUE edits.

03Is 29450 separately billable when performed after a percutaneous Achilles tenotomy (27606)?

Check current NCCI PTP edits first. Bundling rules between 27606 and 29450 have been debated, and the edit status can change between policy years. If an edit exists and an exception applies, append modifier 59 or XS with supporting documentation. Don't assume automatic separability.

04What's the difference between billing 29450 and a routine cast change code for follow-up visits?

29450 requires documented manipulation or molding of the foot into a corrected position. A routine cast change without active repositioning does not meet the threshold for 29450. Use the appropriate cast change code if no manipulation is performed.

05Can an E/M service be billed on the same day as 29450?

Yes, if the E/M is significant and separately identifiable beyond the pre- and post-service work inherent to the cast application. Append modifier 25 to the E/M. The 000-day global does not prohibit a same-day E/M, but the visit must document a problem beyond cast management to survive audit.

06Which HCPCS supply codes pair with 29450?

Bill cast materials (plaster or fiberglass) separately using the appropriate HCPCS A-codes for casting supplies. The 29450 procedure code covers the professional service; supply codes cover the physical materials. Document the material type in the note to support the supply code.

Sources & references

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

Mira Scribe

Mira's AI scribe captures the manipulation technique performed (direction of stretch, degree of correction achieved), cast type (long vs. short leg), material, and laterality directly from dictation. It also flags when a same-day surgical procedure is documented, prompting review of NCCI bundling before 29450 is submitted alongside a column-one code. This prevents the most common denial pattern: notes that describe cast application but don't explicitly document the molding or manipulation that distinguishes 29450 from a routine cast change.

See how Mira captures CPT 29450 documentation