Ob sgnipt cfdna seq alys 1+ — 58 bundling rules
If your bill lists 0489U alongside any of these codes as separate charges, it may be an unbundling error.
About the analyst
Michael Glenn reviews CMS datasets and drug pricing at BillRazor Research. He focuses on NADAC acquisition costs and procedure coding accuracy. Expertise: drug pricing, NADAC data, CPT coding.
Common unbundling errors — medical 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 0489U
58 code pairs that have billing restrictions with this procedure.
| Code | Description | Rule |
|---|---|---|
| 0234U | Mecp2 full gene analysis | May bill with modifier |
| 0252U | Ftl aneuploidy str alys dna | May bill with modifier |
| 0254U | Reprdtve med alys 24 chrmsm | May bill with modifier |
| 0327U | Ftl aneuploidy trsmy dna seq | May bill with modifier |
| 0407U | Neph dbtc ckd mult eclia alg | May bill with modifier |
| 81105 | Hpa-1 genotyping | May bill with modifier |
| 81106 | Hpa-2 genotyping | May bill with modifier |
| 81107 | Hpa-3 genotyping | May bill with modifier |
| 81108 | Hpa-4 genotyping | May bill with modifier |
| 81109 | Hpa-5 genotyping | May bill with modifier |
| 81110 | Hpa-6 genotyping | May bill with modifier |
| 81111 | Hpa-9 genotyping | May bill with modifier |
| 81112 | Hpa-15 genotyping | May bill with modifier |
| 81161 | Dmd dup/delet analysis | May bill with modifier |
| 81200 | Aspa gene | May bill with modifier |
| 81205 | Bckdhb gene | May bill with modifier |
| 81209 | Blm gene | May bill with modifier |
| 81238 | F9 full gene sequence | May bill with modifier |
| 81240 | F2 gene | May bill with modifier |
| 81241 | F5 gene | May bill with modifier |
| 81242 | Fancc gene | May bill with modifier |
| 81243 | Fmr1 gen aly detc abnl allel | May bill with modifier |
| 81244 | Fmr1 gen alys charac alleles | May bill with modifier |
| 81247 | G6pd gene alys cmn variant | May bill with modifier |
| 81248 | G6pd known familial variant | May bill with modifier |
| 81249 | G6pd full gene sequence | May bill with modifier |
| 81250 | G6pc gene | May bill with modifier |
| 81251 | Gba gene | May bill with modifier |
| 81252 | Gjb2 gene full sequence | May bill with modifier |
| 81253 | Gjb2 gene known fam variants | May bill with modifier |
| 81254 | Gjb6 gene com variants | May bill with modifier |
| 81255 | Hexa gene | May bill with modifier |
| 81256 | Hfe gene | May bill with modifier |
| 81260 | Ikbkap gene | May bill with modifier |
| 81290 | Mcoln1 gene | May bill with modifier |
| 81324 | Pmp22 gene dup/delet | May bill with modifier |
| 81325 | Pmp22 gene full sequence | May bill with modifier |
| 81326 | Pmp22 gene known fam variant | May bill with modifier |
| 81328 | Slco1b1 gene com variants | May bill with modifier |
| 81330 | Smpd1 gene common variants | May bill with modifier |
| 81331 | Snrpn/ube3a gene | May bill with modifier |
| 81332 | Serpina1 gene | May bill with modifier |
| 81335 | Tpmt gene com variants | May bill with modifier |
| 81351 | Tp53 gene full gene sequence | May bill with modifier |
| 81352 | Tp53 gene trgt sequence alys | May bill with modifier |
| 81353 | Tp53 gene known famil vrnt | May bill with modifier |
| 81357 | U2af1 gene common variants | May bill with modifier |
| 81360 | Zrsr2 gene common variants | May bill with modifier |
| 81400 | Mopath procedure level 1 | May bill with modifier |
| 81401 | Mopath procedure level 2 | May bill with modifier |
Showing 50 of 58 rules. Show all
FAQ — medical procedure bundling
What is NCCI bundling and what does 'bundled' mean on a medical bill?
How can I identify if codes were incorrectly unbundled on my bill?
What should I do if I find unbundled charges on my medical bill?
When is it legitimate to use modifiers to override NCCI 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.