Application of a halo-type body cast — a rigid vest connected by bars to a halo ring fixed to the skull, used to immobilize the head and cervical spine.

Verified May 8, 2026 · 5 sources ↓

Medicare: $464.94
Total RVUs: 13.92
Global, days: 0
Region: Spine

Drawn from CMSAAPCAMAAsht

Documentation requirements

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

Source · Editorial brief grounded in 5 cited references ↓

Specify the indication: post-surgical cervical immobilization, traumatic instability, or deformity — generic 'spinal immobilization' is insufficient
Document halo ring placement, number and location of skull pins, and vest fit, including whether sheepskin lining was used
Record whether distal fixation to pelvis or femur was added, as this affects the construct documented
Confirm that the cast application was either the sole service or performed following initial treatment by a different provider, justifying standalone billing
Capture the ICD-10 diagnosis code that matches the clinical indication — cervical fracture, post-op cervical instability, or equivalent
Note who applied the cast; if a cast technician employed by the facility applied it under physician supervision, document supervisory involvement per payer policy

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 52 Reduced services 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician KX Documentation on file

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

CPT 29000 covers the application of a sheepskin-lined rigid vest that attaches via upright bars to a halo ring, which is secured to the skull with pins. The construct eliminates motion at the head-cervical spine junction and is used following major cervical spine surgery, traumatic cervical instability, or select high-level spinal deformity cases. Variants can extend fixation to the pelvis via a pelvic hoop or to the femur with pins when additional distal anchoring is required.

The code carries a 000-day global period, meaning no post-procedure care is bundled — each subsequent encounter, cast adjustment, or replacement is separately billable. Under CPT guidelines revised for 2022, cast application is included in the initial fracture or dislocation treatment code when the same provider performs both on the same day; 29000 is reported separately only when the cast is the sole service, when it follows initial treatment by a different provider, or when it represents a replacement cast during or after any global period.

Supplies (halo hardware, vest, bars, pins) are not included in the code valuation and should be reported separately using applicable HCPCS Level II supply codes. If a cast removal is performed by someone other than the provider who applied it, report the appropriate cast removal code (29700 series) separately.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	2.19
Practice expense RVU	10.81
Malpractice RVU	0.92
Total RVU	13.92
Medicare national rate	$464.94
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	$464.94
HOPD (APC 5102) Hospital outpatient department	$285.75
ASC (PI G2) Ambulatory surgical center (freestanding)	$153.62

Common denial reasons

The recurring reasons claims for CPT 29000 get rejected.

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

Bundling denial when billed same-day as the primary spinal procedure by the same provider — cast application is included in the surgical code when both occur together
Missing or mismatched diagnosis: payers reject claims when the ICD-10 code doesn't support cervical or high spinal immobilization requiring a halo construct
Facility billing conflict when a hospital-employed cast technician performs application and both the facility and physician bill for the same service
Lack of documentation distinguishing this as a replacement or subsequent cast versus the initial application bundled into the surgical procedure

Frequently asked questions

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

01Can I bill 29000 the same day as a cervical spine fusion?

Not if you're the operating surgeon applying the halo cast as part of that procedure. CPT guidelines state that the first cast application is included in the musculoskeletal surgical code when both are performed by the same provider at the same encounter. Bill 29000 separately only if a different provider applies the halo, or if it is a replacement cast at a later date.

02What global period applies to 29000?

Zero days. There is no bundled post-procedure care. Every follow-up visit, cast check, or adjustment is separately billable from day one.

03Are halo hardware and vest supplies included in 29000's reimbursement?

No. The code covers the service of application only. Halo rings, skull pins, uprights, and the vest are reported separately using applicable HCPCS Level II supply codes.

04Who can bill 29000 — the physician, the facility, or both?

The professional fee (29000) belongs to the provider who directs and supervises the application. If a hospital-employed cast technician applies the halo, the facility may have a separate billing path, but the physician can bill only if their supervisory involvement meets payer requirements. Confirm with your MAC.

05When is modifier 22 appropriate with 29000?

Use modifier 22 when the application required substantially more work than typical — for example, an unusually complex skull anatomy requiring additional pin placement attempts or significant vest modification. Document the specific factors that increased time and complexity; without that, payers will reject the upcharge.

06Can 29000 be billed for a replacement halo cast after the original was damaged?

Yes. Replacement casts during or after any global period are separately reportable under CPT casting and strapping guidelines. The 000-day global on 29000 means there is no bundling window, but documentation must clearly identify this as a replacement application, not the initial one already included in a surgical code.

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 halo construct details from dictation — vest type, pin count, skull attachment sites, bar configuration, and any pelvic or femoral extension — along with the clinical indication and provider role in the application. That documentation prevents the two most common denials: bundling rejections that stem from an unclear relationship to a same-day surgical procedure, and medical necessity denials caused by a vague operative note that omits the specific immobilization rationale.

See how Mira captures CPT 29000 documentation