Inj tendon sheath/ligament — 192 bundling rules
If your bill lists 20550 alongside any of these codes as separate charges, it may be an unbundling error.
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.
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 20550
192 code pairs that have billing restrictions with this procedure.
| Code | Description | Rule |
|---|---|---|
| 0232T | Njx platelet plasma | May bill with modifier |
| 0481T | Njx autol wbc concentrate | May bill with modifier |
| 0490T | Regn cell tx scldr h mlt inj | May bill with modifier |
| 0596T | Temp fml iu vlv-pmp 1st insj | May bill with modifier |
| 0597T | Temp fml iu valve-pmp rplcmt | May bill with modifier |
| 0903T | Ecg alg 12 lead reduced i&r | May bill with modifier |
| 0904T | Ecg alg 12 ld rdcd trcg only | May bill with modifier |
| 0905T | Ecg alg 12 ld rdcd i&r only | May bill with modifier |
| 10030 | Img gid flu coll drg sft tis | May bill with modifier |
| 10160 | Pnxr aspir absc hmtma bulla | May bill with modifier |
| 11010 | Debride skin at fx site | May bill with modifier |
| 11900 | Inject skin lesions </w 7 | May bill with modifier |
| 11901 | Inject skin lesions >7 | May bill with modifier |
| 12032 | Intmd rpr s/a/t/ext 2.6-7.5 | May bill with modifier |
| 12042 | Intmd rpr n-hf/genit2.6-7.5 | May bill with modifier |
| 20500 | Injection of sinus tract | May bill with modifier |
| 20526 | Ther injection carp tunnel | May bill with modifier |
| 20551 | Inj tendon origin/insertion | May bill with modifier |
| 20552 | Inj trigger point 1/2 muscl | May bill with modifier |
| 20553 | Inject trigger points 3/> | May bill with modifier |
| 20560 | Ndl insj w/o njx 1 or 2 musc | May bill with modifier |
| 20561 | Ndl insj w/o njx 3+ musc | May bill with modifier |
| 29075 | Application of forearm cast | May bill with modifier |
| 29105 | Apply long arm splint | May bill with modifier |
| 29125 | Apply forearm splint | May bill with modifier |
| 29130 | Application of finger splint | May bill with modifier |
| 29260 | Strapping of elbow or wrist | May bill with modifier |
| 29405 | Apply short leg cast | May bill with modifier |
| 29425 | Apply short leg cast | May bill with modifier |
| 29450 | Application of leg cast | May bill with modifier |
| 29515 | Application lower leg splint | May bill with modifier |
| 29530 | Strapping of knee | May bill with modifier |
| 29540 | Strapping of ankle and/or ft | May bill with modifier |
| 29550 | Strapping of toes | May bill with modifier |
| 29580 | Strapping unna boot | May bill with modifier |
| 29581 | Apply multlay comprs lwr leg | May bill with modifier |
| 29584 | Appl multlay comprs arm/hand | May bill with modifier |
| 36000 | Place needle in vein | May bill with modifier |
| 36400 | Vnpnxr<3yrs phy/qhp fem/jug | May bill with modifier |
| 36405 | Vnpnxr<3yrs phy/qhp scalp vn | May bill with modifier |
| 36406 | Vnpnxr<3yrs phy/qhp other vn | May bill with modifier |
| 36410 | Vnpnxr 3yr/> phy/qhp dx/ther | May bill with modifier |
| 36420 | Venipuncture cutdown < 1 yr | May bill with modifier |
| 36425 | Venipuncture cutdown 1 yr/> | May bill with modifier |
| 36430 | Transfusion bld/bld compnt | May bill with modifier |
| 36440 | Bld push tfuj 2 yr/< | May bill with modifier |
| 36591 | Draw blood off venous device | Never bill together |
| 36592 | Collect blood from picc | Never bill together |
| 36600 | Withdrawal of arterial blood | May bill with modifier |
| 36640 | Insertion catheter artery | May bill with modifier |
Showing 50 of 192 rules. Show all
FAQ — Surgery procedure bundling
What is NCCI bundling and what does 'bundled' mean on a medical bill?
How can I determine if surgical codes were incorrectly unbundled on my bill?
What should I do if I find unbundled charges on my medical bill?
When is it legitimate for hospitals to use modifiers to bypass bundling rules?
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.