Double-Charge Detector 0659T

Tcat intra-c nfs supersat o2 — 107 bundling rules

If your bill lists 0659T alongside any of these codes as separate charges, it may be an unbundling error.

By David Park , Healthcare Cost Researcher · Published March 15, 2026 · Updated April 3, 2026

About the analyst

David Park researches procedure pricing and insurance reimbursement patterns at BillRazor Research. He specializes in cost comparison across care settings and metropolitan areas. Expertise: procedure pricing, insurance reimbursement, cost comparison.

NCCI edit data

107 code pairs

Updated 2026-04-03

Bundling rules — 0659T

NCCI edits: these codes have billing restrictions when billed with 0659T

Research suggests 49–80% of hospital bills contain errors. Our system checks every line item against Medicare benchmarks.

Common unbundling errors — Other procedures

Unbundling occurs when medical providers bill two separate codes for services that should be combined into a single charge according to National Correct Coding Initiative (NCCI) rules. In other procedures including anesthesia, radiology, pathology, and miscellaneous support services, common unbundling patterns include separately billing diagnostic imaging with its professional interpretation when both should be included in one comprehensive code, and charging for basic monitoring or preparation services alongside the primary procedure when these components are considered integral parts of the main service. Another frequent error involves billing multiple pathology examination codes for what constitutes a single comprehensive analysis. With 809 other codes subject to bundling restrictions in the NCCI database, these errors create charges above the benchmark for patients who receive multiple bills for what should constitute one complete service. The potential difference between unbundled billing and correct coding practices can significantly impact patient financial responsibility, as they may face duplicate charges for components of care that medical coding standards define as a single billable service.

What to check on your bill

When reviewing itemized bills for procedure bundling issues, patients should examine several key areas to identify potential billing irregularities. Look for multiple procedure codes billed on the same date that represent components of a comprehensive service, such as separate charges for incision, repair, and closure when these steps are typically included in one primary procedure code. Watch for code patterns where related procedures share the same first three digits, as these often indicate services that should be bundled together under Medicare's Correct Coding Initiative. Check for appropriate modifier usage, particularly modifier 59 or XS, which legitimately allow separate billing when procedures are performed on different anatomical sites or during distinct sessions. Without proper modifiers, separately billed related procedures may represent charges above the benchmark. Compare your itemized statement against standard bundling practices for your specific procedure type to identify potential differences in billing patterns.

All bundling rules for 0659T

107 code pairs that have billing restrictions with this procedure.

Never bill together

May bill with modifier

Code	Description	Rule
01924	Anes ther interven rad artrl	Never bill together
01925	Anes ther interven rad card	Never bill together
01926	Anes tx interv rad hrt/cran	Never bill together
0596T	Temp fml iu vlv-pmp 1st insj	May bill with modifier
0597T	Temp fml iu valve-pmp rplcmt	May bill with modifier
0632T	Perq tcat us abltj nrv p-art	May bill with modifier
0913T	Prq tcat ther rx ntrac balo1	May bill with modifier
11000	Dbrdmt ecz/infected skin<10%	May bill with modifier
11001	Dbrdmt ecz/infct skn ea addl	May bill with modifier
11004	Dbrdmt skin xtrnl gent&per	May bill with modifier
11005	Dbrdmt skin abdominal wall	May bill with modifier
11006	Dbrdmt skin xtrnl gent per	May bill with modifier
11042	Dbrdmt subq tis 1st 20sqcm/<	May bill with modifier
11043	Dbrdmt musc&/fsca 1st 20/<	May bill with modifier
11044	Dbrdmt bone 1st 20 sq cm/<	May bill with modifier
11045	Dbrdmt subq tiss each addl	May bill with modifier
11046	Dbrdmt musc&/fsca ea addl	May bill with modifier
11047	Dbrdmt bone each addl	May bill with modifier
33210	Insert electrd/pm cath sngl	Never bill together
34713	Perq access & clsr fem art	May bill with modifier
34714	Opn fem art expos cndt crtj	May bill with modifier
34812	Opn fem art expos	May bill with modifier
34813	Femoral endovas graft add-on	May bill with modifier
35201	Repair blood vessel dir neck	May bill with modifier
35206	Repair blood vessel dir uxtr	May bill with modifier
35226	Repair blood vessel dir lxtr	May bill with modifier
35231	Repair blvsl vn grf neck	May bill with modifier
35236	Repair blvsl vn grf uxtr	May bill with modifier
35256	Repair blvsl vn grf lxtr	May bill with modifier
35261	Rpr blvsl grf oth/thn vn nck	May bill with modifier
35266	Rpr blvsl grf oth/th vn uxtr	May bill with modifier
35286	Rpr blvsl grf oth/th vn lxtr	May bill with modifier
36140	Intro ndl icath upr/lxtr art	May bill with modifier
36160	Establish access to aorta	May bill with modifier
36200	Place catheter in aorta	May bill with modifier
36215	Place catheter in artery	May bill with modifier
36216	Place catheter in artery	May bill with modifier
36217	Place catheter in artery	May bill with modifier
36245	Ins cath abd/l-ext art 1st	May bill with modifier
36246	Ins cath abd/l-ext art 2nd	May bill with modifier
36247	Ins cath abd/l-ext art 3rd	May bill with modifier
36591	Draw blood off venous device	Never bill together
36592	Collect blood from picc	Never bill together
36620	Insertion catheter artery	May bill with modifier
36625	Insertion catheter artery	May bill with modifier
37236	Open/perq place stent 1st	May bill with modifier
37246	Trluml balo angiop 1st art	May bill with modifier
37247	Trluml balo angiop addl art	May bill with modifier
64451	Njx aa&/strd nrv nrvtg si jt	Never bill together
64454	Njx aa&/strd gnclr nrv brnch	Never bill together

Showing 50 of 107 rules. Show all

FAQ — Other procedure bundling

What is NCCI bundling and what does 'bundled' mean on a medical bill?

NCCI bundling refers to the National Correct Coding Initiative rules that prevent certain procedure codes from being billed separately when performed together. When codes are bundled, one procedure is considered inclusive of another, meaning only the primary procedure should be billed rather than charging for each component separately.

How can I identify if codes were incorrectly unbundled on my bill?

Incorrectly unbundled codes appear as separate line items on your bill when NCCI rules indicate they should be grouped together under one primary procedure code. This typically occurs with anesthesia, radiology, pathology, and miscellaneous support services that are considered integral to the main procedure being performed.

What should I do if I find unbundled charges on my medical bill?

Contact your healthcare provider's billing department to request a review of the charges and provide documentation showing the NCCI bundling rules that apply. Request an itemized explanation of why the codes were billed separately and ask for a corrected bill that reflects proper bundling if no valid modifier justification exists.

When is it legitimate to use modifiers to override NCCI bundling rules?

Modifiers are appropriately used when procedures are performed on different anatomical sites, during separate patient encounters, or when distinct procedural services are provided that don't fall under the bundling restrictions. The modifier usage must be supported by clear documentation in the medical record that demonstrates the services were truly separate and distinct from the bundled procedure.

Rates shown are from the 2026 Medicare Physician Fee Schedule and CMS IPPS. BillRazor compares your bill against these data sources. See how it works →

Data source: CMS National Correct Coding Initiative (NCCI) Procedure-to-Procedure (PTP) edits, updated quarterly. These code pairs are maintained by CMS to prevent improper billing of services that should be billed as a single procedure.

What this means: When two codes are listed as an NCCI edit pair, billing them separately on the same date of service is typically incorrect. "Never bill together" means no modifier can override the rule. "May bill with modifier" means the codes can be billed separately with appropriate documentation.