CPT code 21183: Cranial reconstruction, multiple-suture craniosynostosis2026 Medicare rate & RVUs in Iowa

In Iowa, Medicare pays $1,823.21 for 21183 in a facility. There’s no office rate.

Check a contract rate as a % of Medicare · 21183 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 21183 covers

21183 represents operative cranial-vault remodeling for craniosynostosis affecting multiple sutures, with bone grafting as part of the reconstruction. The surgeon reshapes and repositions cranial bone to correct the vault deformity and create room for brain growth. Craniofacial surgeons and pediatric neurosurgeons commonly perform this major operation in a hospital operating room, often as part of a multidisciplinary craniofacial plan.

Select this code when the operative record supports multiple-suture synostosis and the reconstruction matches this extent; a single-suture repair or a secondary extensive reconstruction falls under a different family level. Documentation should identify the fused sutures, deformity, bone remodeling and osteotomies, graft use, and reconstructive work. CMS assigns a 90-day major-surgery global, including the day-before preoperative visit and related postoperative care through day 90. For multiple procedures in one session, the highest-valued procedure is paid in full and others at 50%. Modifier 50 is not appropriate for this cranial anatomy. An assistant at surgery may be paid; co-surgeon payment requires supporting documentation, and team-surgery billing is not permitted.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

How Iowa compares for 21183

Across 109 of 109 payment localities, the facility rate for 21183 runs from $1,813.49 in Arkansas to $2,532.03 in Alaska. Iowa pays $1,823.21. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

21183 rates by state

Office rate range in each state. Select a state to see its payment localities.

See 21183 in every payment locality

How the 21183 rate is calculated

Each of 21183’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 21183

21183 has a 90-day global period: related visits in that window are included in the surgery payment.

What modifiers do to the payment

When to use modifier 51

Codes related to 21183

Related codes aren’t interchangeable: bill the code that matches the service performed.

How 21183 has changed in Iowa

Price 21183 for an earlier date of service

Where the Iowa rate applies

Iowa is a Medicare payment area, not a city. Our Census mapping connects it to 1026 cities and communities in Iowa. Some span more than one payment area; confirm with the service ZIP.

• Ackley
• Ackworth
• Adair
• Adel
• Afton
• Agency
• Ainsworth
• Akron

Browse all communities in Iowa

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates