Double-Charge Detector 22846

Insert spine fixation device — 65 bundling rules

If your bill lists 22846 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

65 code pairs

Updated 2026-04-03

Bundling rules — 22846

NCCI edits: these codes have billing restrictions when billed with 22846

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

Common unbundling errors — Surgery procedures

Unbundling occurs when hospitals bill component steps of a surgical procedure separately instead of using the appropriate comprehensive code that covers the entire operation. The NCCI database contains 1,142 surgery codes with bundling restrictions to prevent this practice. Common unbundling patterns include separately billing for surgical approach and closure when these are integral components of the main procedure, and charging for routine preparation steps like positioning or draping that are already included in the primary surgical code. Another frequent error involves billing separately for minor procedures performed during the same operative session that should be considered incidental to the major surgery. These billing practices result in charges above the benchmark for what should constitute a single surgical service. Patients may face potential differences in their financial responsibility when component procedures are unbundled rather than appropriately consolidated under comprehensive surgical codes. Understanding these bundling rules helps ensure accurate billing that reflects the actual scope of surgical services provided during a single operative encounter.

What to check on your bill

When reviewing surgery bills, patients should examine itemized charges for potential unbundling issues. Look for multiple procedure codes billed separately when they should be bundled together under standard billing practices. Watch for code patterns where a primary procedure appears alongside related minor procedures without appropriate modifiers - for example, seeing separate charges for incision, repair, and closure that typically comprise one surgical package. Check that modifier codes like -59 or -25 are present when separate procedures are legitimately billed, as these indicate the charges meet specific criteria for separate billing. Verify that pre-operative and post-operative care aren't billed separately from the main procedure unless clearly documented as distinct services. Compare your itemized statement against the original procedure authorization to identify any charges above the benchmark for your specific surgery type, noting potential differences between bundled and unbundled billing approaches.

All bundling rules for 22846

65 code pairs that have billing restrictions with this procedure.

Never bill together

May bill with modifier

Code	Description	Rule
0333T	Visual ep scr acuity auto	Never bill together
0464T	Visual ep test for glaucoma	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
20650	Insert and remove bone pin	May bill with modifier
22505	Manipulation of spine	Never bill together
22845	Insert spine fixation device	May bill with modifier
22850	Remove spine fixation device	May bill with modifier
22852	Remove spine fixation device	May bill with modifier
32100	Exploration of chest	May bill with modifier
36591	Draw blood off venous device	Never bill together
36592	Collect blood from picc	Never bill together
38220	Dx bone marrow aspirations	Never bill together
38222	Dx bone marrow bx & aspir	Never bill together
38230	Bone marrow harvest allogen	Never bill together
38232	Bone marrow harvest autolog	Never bill together
49000	Exploration of abdomen	Never bill together
49002	Reopening of abdomen	May bill with modifier
51701	Insert bladder catheter	May bill with modifier
51702	Insert temp bladder cath	May bill with modifier
51703	Insert bladder cath complex	May bill with modifier
62320	Njx interlaminar crv/thrc	Never bill together
62321	Njx interlaminar crv/thrc	Never bill together
62322	Njx interlaminar lmbr/sac	Never bill together
62323	Njx interlaminar lmbr/sac	Never bill together
62324	Njx interlaminar crv/thrc	Never bill together
62325	Njx interlaminar crv/thrc	Never bill together
62326	Njx interlaminar lmbr/sac	Never bill together
62327	Njx interlaminar lmbr/sac	Never bill together
64479	Njx aa&/strd tfrm epi c/t 1	May bill with modifier
64483	Njx aa&/strd tfrm epi l/s 1	May bill with modifier
92652	Aep thrshld est mlt freq i&r	Never bill together
92653	Aep neurodiagnostic i&r	Never bill together
95822	Eeg coma or sleep only	Never bill together
95860	Needle emg 1 extremity	Never bill together
95861	Needle emg 2 extremities	Never bill together
95863	Needle emg 3 extremities	Never bill together
95864	Needle emg 4 extremities	Never bill together
95865	Needle emg larynx	Never bill together
95866	Needle emg hemidiaphragm	Never bill together
95867	Ndl emg cranial nrv musc uni	Never bill together
95868	Ndl emg cranial nrv musc bi	Never bill together
95869	Ndl emg thrc paraspinal musc	Never bill together
95870	Ndl emg lmtd std musc 1 xtr	Never bill together
95907	Nvr cndj tst 1-2 studies	Never bill together
95908	Nrv cndj tst 3-4 studies	Never bill together
95909	Nrv cndj tst 5-6 studies	Never bill together
95910	Nrv cndj test 7-8 studies	Never bill together
95911	Nrv cndj test 9-10 studies	Never bill together
95912	Nrv cndj test 11-12 studies	Never bill together

Showing 50 of 65 rules. Show all

FAQ — Surgery procedure bundling

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

NCCI bundling refers to Medicare's National Correct Coding Initiative rules that require certain surgical procedure codes to be billed together as a single comprehensive service rather than as separate line items. When procedures are 'bundled,' component steps of a surgery are included in one primary procedure code instead of being billed individually, which reflects the standard of care for that operation.

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

Incorrect unbundling occurs when a hospital bills separate codes for surgical steps that should be included in one comprehensive procedure code according to NCCI rules. You can identify potential unbundling by looking for multiple surgical codes billed on the same date that represent component parts of a single operation, particularly among the 1,142 codes with known bundling restrictions.

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

If you identify potentially unbundled charges, contact your hospital's billing department to request a review of the coding and ask them to verify compliance with NCCI bundling rules. You can also work with your insurance company's medical review team or consult with a medical billing advocate to analyze the charges against established bundling requirements.

When is it legitimate for hospitals to use modifiers to bypass bundling rules?

Modifiers can legitimately bypass bundling rules when surgical procedures are performed on different anatomical sites, during separate patient encounters, or when clinical circumstances genuinely require distinct procedures beyond the standard bundled service. However, modifier usage must be supported by medical documentation that demonstrates the procedures were truly separate and distinct from the bundled service.

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.