Application of a cranial halo orthosis using six or more pins for skeletal fixation of the cervical spine or skull.
Verified May 8, 2026 · 4 sources ↓
- Medicare
- $941.91
- Total RVUs
- 28.2
- Global, days
- 90
- Region
- Spine
Documentation requirements
What must appear in the operative or office note to support the claim.
Source · Editorial brief grounded in 4 cited references ↓
- Exact number of pins placed (must be six or more to support 20664 vs. lower-complexity codes)
- Indication for halo application — diagnosis driving the need for cranial skeletal fixation
- Technique note documenting pin placement sites, torque settings, and vest or ring sizing
- Surgeon attestation of intraoperative fluoroscopy use if billed separately (and why it constitutes a distinct service)
- Post-application neurological and pin-site status documented before patient leaves the procedure area
- For trauma cases, imaging findings that support instability or fracture pattern requiring halo fixation
Applicable modifiers
Modifiers commonly billed with this code.
Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual
What this code covers
Source · Editorial summary grounded in 4 cited references ↓
CPT 20664 covers surgical application of a halo cranial device anchored with six or more pins. This is a major procedure — 90-day global — used most commonly for unstable cervical spine injuries, post-operative cervical stabilization, or correction of deformity. The pin count (six or more) distinguishes 20664 from lower-complexity halo applications; document exact pin count in the operative note.
The 90-day global bundles the application, all routine post-application management, and pin-site care through day 90. Separately billing for routine pin-site care or standard follow-up visits within that window will deny. If a distinct, unrelated condition is managed during the global period, bill with modifier 24 (E/M) or 79 (unrelated procedure). An E/M on the day of surgery for the decision to operate bills with modifier 57.
Fluoroscopic guidance used solely to confirm halo placement is generally considered integral to the procedure and not separately reportable. If fluoroscopy is used for a distinct, separately identifiable service performed the same day, document that service independently and apply modifier 59 or XS as appropriate per NCCI guidance.
RVU & reimbursement
Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.
Source · CMS Physician Fee Schedule, RVU26A · January 2026
| Work RVU | 9.81 |
| Practice expense RVU | 14.26 |
| Malpractice RVU | 4.13 |
| Total RVU | 28.2 |
| Medicare national rate | $941.91 |
| 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 | $941.91 |
HOPD (APC 5112) Hospital outpatient department | $1,642.82 |
ASC (PI J8) Ambulatory surgical center (freestanding) | $1,105.94 |
Common denial reasons
The recurring reasons claims for CPT 20664 get rejected.
Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓
- Pin count not documented — payer cannot confirm six-or-more-pin threshold for 20664 vs. a lower-level code
- Routine pin-site care billed separately during the 90-day global period without modifier 24 or 79
- Fluoroscopy billed separately when payer considers it integral to the halo application procedure
- E/M on the date of service billed without modifier 57, triggering global-period bundling denial
- Missing or vague diagnosis code — halo application must tie to a specific spinal instability, fracture, or deformity ICD-10 code
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 4 cited references ↓
01What separates 20664 from 20661?
02Can I bill separately for fluoroscopy used during halo placement?
03What does the 90-day global cover for 20664?
04How do I bill an E/M on the day of halo application?
05If the halo fails and requires replacement during the global period, how is that billed?
06Is 20664 billable in an ASC setting?
07What ICD-10 diagnoses support 20664?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
Mira AI Scribe
Mira's AI scribe captures pin count, placement sites, torque documentation, and the specific indication (fracture level, instability pattern, deformity) from the surgeon's dictation. That pin-count capture is what separates a clean 20664 claim from a downcoded or denied one — auditors pull operative notes specifically to verify the six-or-more-pin threshold.
See how Mira captures CPT 20664 documentation