Double-Charge Detector 0691T

Auto alys xst ct std vrt fx — 46 bundling rules

If your bill lists 0691T alongside any of these codes as separate charges, it may be an unbundling error.

By Elena Vasquez , Medical Billing Research Lead · Published March 15, 2026 · Updated April 3, 2026

About the analyst

Elena Vasquez leads hospital billing pattern analysis at BillRazor Research. She focuses on identifying overcharges, markup outliers, and patient advocacy strategies. Expertise: hospital billing patterns, overcharge analysis, patient advocacy.

NCCI edit data

46 code pairs

Updated 2026-04-03

Bundling rules — 0691T

NCCI edits: these codes have billing restrictions when billed with 0691T

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 0691T

46 code pairs that have billing restrictions with this procedure.

Never bill together

May bill with modifier

Code	Description	Rule
0554T	B1 str & fx rsk analysis	Never bill together
0555T	B1 str&fx rsk transmis data	Never bill together
0556T	B1 str & fx rsk assessment	Never bill together
0557T	B1 str & fx rsk i&r	Never bill together
0558T	Ct scan f/biomchn ct alys	Never bill together
0743T	B1 str & fx rsk vrt fx assmt	Never bill together
36591	Draw blood off venous device	Never bill together
36592	Collect blood from picc	Never bill together
71250	Ct thorax dx c-	Never bill together
71260	Ct thorax dx c+	Never bill together
71270	Ct thorax dx c-/c+	Never bill together
71271	Ct thorax lung cancer scr c-	Never bill together
71275	Ct angiography chest	Never bill together
72125	Ct neck spine w/o dye	Never bill together
72126	Ct neck spine w/dye	Never bill together
72127	Ct neck spine w/o & w/dye	Never bill together
72128	Ct chest spine w/o dye	Never bill together
72129	Ct chest spine w/dye	Never bill together
72130	Ct chest spine w/o & w/dye	Never bill together
72131	Ct lumbar spine w/o dye	Never bill together
72132	Ct lumbar spine w/dye	Never bill together
72133	Ct lumbar spine w/o & w/dye	Never bill together
72191	Ct angiograph pelv w/o&w/dye	Never bill together
72192	Ct pelvis w/o dye	Never bill together
72193	Ct pelvis w/dye	Never bill together
72194	Ct pelvis w/o & w/dye	Never bill together
74150	Ct abdomen w/o contrast	Never bill together
74160	Ct abdomen w/contrast	Never bill together
74170	Ct abd wo cntrst flwd cntrst	Never bill together
74174	Cta abd&plvs w/contrast	Never bill together
74175	Cta abdomen w/contrast	Never bill together
74176	Ct abd & pelvis w/o contrast	Never bill together
74177	Ct abd & pelvis w/contrast	Never bill together
74178	Ct abd&plv wo cntr flwd cntr	Never bill together
74261	Ct colonography dx	Never bill together
74262	Ct colonography dx w/dye	Never bill together
74263	Ct colonography screening	Never bill together
75571	Ct hrt w/o dye w/ca test	Never bill together
75572	Ct hrt w/3d image	Never bill together
75573	Ct hrt c+ strux cgen hrt ds	Never bill together
75574	Ct angio hrt w/3d image	Never bill together
75635	Ct angio abdominal arteries	Never bill together
78814	Pet image w/ct lmtd	Never bill together
78815	Pet image w/ct skull-thigh	Never bill together
78816	Pet image w/ct full body	Never bill together
96523	Irrig drug delivery device	Never bill together

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.