CurrentBaylor Scott & White Health PlanPolicy 294

Endoscopic Surgery for Craniosynostosis

Defines medical necessity and prior authorization requirements for endoscopic (endoscopy-assisted) surgical repair of craniosynostosis in infants, and lists applicable procedure and diagnosis codes. Applies to Baylor Scott & White Health Plan lines of business and referenced Medicare/Medicaid guidance.

Policy Summary

PayerBaylor Scott & White Health Plan

PolicyEndoscopic Surgery for Craniosynostosis

Policy CodePolicy 294

Change TypeNo material changes

Effective DateJun 1, 2026

Next Review DateMay 28, 2027

Key ActionObtain prior authorization before performing endoscopic surgery for craniosynostosis.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

≤6 moage limit for medical necessity

61550,61552,61558,64999listed procedure codes that may apply

Q75.0diagnosis code referenced

Prior authrequirement

Coverage Criteria for Endoscopic Craniosynostosis Surgery

Policy Summary

PayerBaylor Scott & White Health Plan

PolicyEndoscopic Surgery for Craniosynostosis

Policy CodePolicy 294

Change TypeNo material changes

Effective DateJun 1, 2026

Next Review DateMay 28, 2027

Key ActionObtain prior authorization before performing endoscopic surgery for craniosynostosis.

SourceLink

On This Page

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Complex multi-suture and syndromic craniosynostosis, particularly cases that require fronto-orbital advancement, are frequently not amenable to endoscopic correction and are better managed with open cranial vault reconstruction. The policy recognizes that while endoscopic approaches are established for selected infants, open approaches remain necessary for these complex patterns and should be considered the appropriate surgical option.

Endoscopic-assisted procedures are most appropriate for selected infants with single-suture disease (for example, sagittal or metopic synostosis) and are typically performed when the infant is younger than 6 months. Endoscopic surgery is not appropriate for patterns such as complex multi-suture involvement or syndromic craniosynostosis that require open cranial vault reconstruction (including those needing fronto-orbital advancement); in these situations an open approach is indicated.

Applicable Procedure and Diagnosis Codes

CPT Codes that may applyCPTCovered

61550	Craniectomy for craniosynostosis; single cranial suture
61552	Craniectomy for craniosynostosis; multiple cranial sutures
61558	Extensive craniectomy for multiple cranial suture craniosynostosis
64999	Unlisted procedure, nervous system

ICD-10 CodesICD-10Covered

Q75.0

Craniosynostosis

inv-06: Age threshold

Age thresholdMember is age 6 months or less

Criteria roleRequired for medical necessity of endoscopic repair

Related requirementPrior authorization is required (see policy) and documentation must support age

Provider Requirements and Prior Authorization

Prior Authorization

Prior Authorization Required

Prior authorization is required for endoscopic surgery for craniosynostosis.

Prior authorization required for CPT codes 61550, 61552, 61558, and 64999 (unlisted procedure) where applicable.
Verify member benefits and obtain authorization before scheduling; failure to obtain prior authorization may result in claim denial.

Note

Provider Alert

Reserved for any short, high-priority provider action or alert from the source.

Documentation Required

Documentation Requirements

Clinical documentation must support the member's age and diagnosis, and must indicate which cranial suture(s) are involved.

Documentation must confirm member is aged ≤ 6 months at time of surgery.
Documentation must include the specific diagnosis (e.g., Q75.0) and identify the suture(s) involved (single vs. multiple).
Include operative notes, imaging reports, and any pre-authorization clinical summaries to substantiate medical necessity.

Denial Risk

Failure to obtain prior authorization when required may result in denial of coverage.

Claims submitted without required prior authorization are at risk for denial.
Confirm authorization number and include in claim submission to reduce denial risk.

Clinical Background

Craniosynostosis results from premature fusion of one or more cranial sutures, which restricts skull expansion during the rapid brain growth that occurs in the first year of life. Endoscopic-assisted strip craniectomy or suturectomy uses an endoscope and small scalp incisions to remove the fused suture and permit the brain to expand; the procedure is less invasive than open cranial vault reconstruction, typically takes 1–2 hours, and most patients are discharged within 1–2 days. Endoscopic repair is well established as the standard of care for selected young infants, generally those younger than 6 months, and has been associated with lower operative risk, shorter hospital stays, and reduced postoperative morbidity. However, not all craniosynostosis types are amenable to endoscopic techniques, and complex multi-suture or syndromic cases often require open reconstruction.

Definitions and Postoperative Care

inv-12: Definition — Endoscopic-assisted strip craniectomy/suturectomy

Endoscopic-assisted strip craniectomy/suturectomy - definitionLess invasive procedure using an endoscope to remove the fused suture(s) via small scalp incisions to allow brain growth; typically 1–2 hour operation with 1–2 day hospitalization

Surgical technique detailsTwo small scalp incisions are made over the fused suture; a rectangular strip of bone containing the fused suture is removed using a rigid endoscope and electrocautery after separating the dura

Indications and advantagesBest performed in infants younger than 6 months; associated with less operative risk, shorter hospital stays, and reduced postoperative morbidity compared with open vault reconstruction

LimitationsNot appropriate for some complex multi-suture or syndromic craniosynostosis that require open cranial vault reconstruction or fronto-orbital advancement

inv-13: Postoperative cranial molding helmet — timing and typical duration of helmet therapy

Timing to fit helmetInfant is fitted with a customized cranial molding helmet within 1 week of surgery

Duration of helmet therapyHelmet guides skull growth over approximately 11 to 12 months

Follow-up and adjustmentsMost patients need one or two helmets during treatment with follow-up appointments every 2 to 3 months for adjustments