ICD code T86.890 – Other transplanted tissue rejection

Key takeaways

T86.890 reports rejection of a transplanted organ or tissue that has no dedicated T86 subcategory, with pancreas graft rejection as the indexed example.

The code is billable at six characters and takes no seventh character, unlike most chapter 19 injury codes.

Failure, infection and other complications of the same tissue take T86.891, T86.892 and T86.898, so the physician’s complication word picks the sixth character.

Kidney, liver, heart, lung, skin, bone, cornea and intestine grafts have their own rejection codes, so T86.890 never applies to them.

Leave Z94 status codes off the claim, and sequence any GVHD, PTLD or transplant malignancy code after T86.890.

ICD-10 code T86.890 means rejection of a graft outside the named groups

ICD-10 code T86.890 reports rejection of a transplanted organ or tissue that ICD-10-CM does not give its own subcategory. Its official descriptor is “Other transplanted tissue rejection.”

The Alphabetic Index sends pancreas transplant rejection straight here. The Tabular backs that up, listing “transplant failure or rejection of pancreas” as an inclusion term under the parent T86.89.

Code validity renews every October 1, so confirm T86.890 in the CDC ICD-10-CM browser tool after each annual release. Then check the graft against the map below before you settle on it.

Which grafts belong in T86.890, and which have their own rejection codes

The graft decides the subcategory before the complication decides the sixth character. Most transplanted organs have a dedicated rejection code, so T86.890 stays in play only when the graft has no named home.

The Index adds one more route. Under “Rejection, transplant,” the entry “specified NEC” also leads to T86.890. That covers a named graft with no subcategory, such as a hand or face allograft.

Two look-alikes trip coders. An intestine graft has its own T86.85 group, so its rejection is T86.850. A note that says “organ rejection” without naming the organ indexes to T86.91, not T86.890. Look up the alternative in our ICD-10-CM code library before you recode.

Five sixth characters under T86.89 split the complication type

T86.89 is a non-billable parent, so every claim needs a sixth character. That character names what went wrong with the graft, and T86.890 is the one for rejection.

Rejection is the first branch, so T86.890 wins whenever the physician documents it and the graft still works. A documented failure moves the claim to T86.891. A graft infection moves it to T86.892, which also needs the organism code.

T86.890 vs T86.898: Rejection or another complication

T86.898 is the catch-all for a named complication of other transplanted tissue that is not rejection, failure or infection. T86.890 is narrower. It applies only once the physician uses the word rejection, or a named rejection type.

So a pancreas graft thrombosis or an anastomotic leak goes to T86.898. Biopsy-proven acute cellular or antibody-mediated rejection of the same graft goes to T86.890. Picking T86.898 for rejection undercodes the encounter and hides the diagnosis from audit.

The quick test takes two steps. First, name the graft and check the map above. Then read the exact complication word the physician used, as the path below shows.

The Excludes and use-additional-code notes that still bind T86.890

T86.89 and T86.890 carry no Excludes notes of their own. The instructions that bind T86.890 sit higher up, at the T86 category and the T80-T88 block, and on the codes that pair with it.

The Z94 note causes the most rework. T86.890 already tells the payer the patient has a transplant, so Z94.83, the pancreas transplant status code, stays off the claim.

Sequencing T86.890: The rejection code usually goes first

Section I.C.19.g.3 of the ICD-10-CM Official Guidelines sets the rules for transplant complications. Download the current guidelines from the CMS ICD-10 codes page.

Under those rules, T86 codes cover both complications and rejection of transplanted organs. A T86 code applies only when the problem affects the function of the graft. Here is how that plays out for T86.890.

• Principal diagnosis: T86.890 goes first when rejection is the condition chiefly responsible for the admission after study.
• Outpatient visits: List T86.890 first when rejection is the main reason for the visit, such as a biopsy review or a change in immunosuppression.
• Resulting condition: Add a secondary code for a condition the rejection produces, exactly as the physician documents it.
• Category note: GVHD (D89.81-), PTLD (D47.Z1) and transplant malignancy (C80.2) each carry a code-first note for T86.-, so they follow T86.890.
• Two grafts: When a pancreas and a kidney graft are both rejected, report T86.890 and T86.11, the kidney rejection code.
• Status codes: Leave Z94 codes off, because category Z94 has an Excludes1 note for transplant complications.

Check the organ ranges before you finalize the order. Kidney complications run through T86.1-, heart through T86.2- and liver through T86.4-, so none of those grafts belongs on T86.890.

What the chart must show before you code rejection

Documentation decides whether T86.890 holds up at audit. Check the record for four elements, in line with medical billing compliance standards.

1. The graft, named: The note identifies the transplanted organ or tissue, for example “pancreas transplant, 2021.”
2. Rejection, stated: The physician documents rejection, ideally with its type, such as acute cellular or antibody-mediated rejection.
3. The link to the transplant: The note ties the rejection to the transplanted tissue rather than to a native organ.
4. Supporting evidence: The record references the biopsy, donor-specific antibody results or lab trends behind the diagnosis.

Abnormal labs alone do not support T86.890. If the note only says “rising lipase” or “transplant complication,” query the physician and get an addendum before the claim goes out.

T86.890 in practice: Five charts and the codes they support

Small changes in note wording change the code. These five charts show where the line falls. Search each code in the AAPC Codify lookup if your team wants the full Tabular notes beside it.

Take the first chart in detail. A patient had a simultaneous pancreas-kidney transplant in 2019. A biopsy now shows acute cellular rejection of the pancreas, while the kidney graft works normally.

Code T86.890 first, then any resulting condition as documented. Leave the T86.1- codes off, since the kidney graft has no complication. Z94.83 stays off the claim as well.

How a T86.890 claim moves from chart to payment

A T86.890 claim passes four stops on its way to payment. Each one stalls for a different reason.

• Coding: The coder confirms the graft, the complication type and the sequence. Most denials start with a shortcut at this stop.
• Coverage check: Coverage policies attach to the services you bill, such as a biopsy or an admission, not to T86.890 itself. Check your Medicare contractor’s local coverage determinations and each commercial payer’s policy.
• Submission: The claim goes to a clearinghouse, such as Claim.MD in the US. Its edits reject missing or invalid fields before the payer sees them.
• Remittance: The payer pays, denies or asks for records. The electronic remittance advice carries the claim adjustment reason code (CARC) that explains a denial.

Review clean claim requirements with your billing team before the first submission. Medicaid adds one more variable, since rules vary by state.

Why T86.890 claims get denied and how to fix each one

T86.890 denials tend to follow five patterns. Each has a fix you can make before you resubmit, and a steady denial management process stops them from repeating.

CARC 96 means the payer does not cover the charge at all, which a coding fix will not cure. CARC 4 points to a procedure code and modifier mismatch, not to the diagnosis.

Before you submit a T86.890 claim

Run this check against the note, not against memory. Each line maps to one of the denial patterns in the table above.

• The graft is named, and it has no dedicated T86 subcategory.
• The physician wrote rejection, not failure, infection or another complication.
• The claim carries T86.890, never the parent T86.89.
• T86.890 is listed first when rejection drove the encounter.
• Any GVHD, PTLD or transplant malignancy code follows it.
• No Z94 status code appears anywhere on the claim.
• Biopsy, antibody or lab results that support the diagnosis are in the record.

The ICD-9-CM crosswalk for T86.890 has no exact match

ICD-9-CM has no one-to-one match for T86.890. In the CMS General Equivalence Mappings, T86.890 maps to two legacy codes, and both matches are flagged as approximate.

Rejection had no code of its own in ICD-9-CM. The 996.8x codes covered rejection, failure and other complications together, so 996.86 also maps to T86.891 and T86.899. Use the crosswalk for audits of pre-October 2015 dates of service only.

How Pabau keeps T86.890 claims moving after coding

A correct code is only half the job. The claim still has to reach the payer and come back paid. Many practices track that across a clearinghouse portal and a spreadsheet.

Pabau, the practice management platform we build, connects to Claim.MD for electronic claim submission in the US. With its claims tracking software, your team sends claims, checks eligibility and follows remittances in one place.

The coding decisions in this guide stay with your coders. Pabau handles the submission and follow-up, so your team can see which T86.890 claims are still open.

Submit and track T86.890 claims in one place

Pabau connects to Claim.MD, so your team can submit US claims electronically, check eligibility and track remittances without switching systems.

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Conclusion

T86.890 is a narrow code, and that works in your favor. Once the graft has no named subcategory and the physician wrote “rejection,” the code choice is settled.

The risk sits in the codes around it. A stray Z94 code, a GVHD code sequenced first, or a note that never names the graft will sink a correct T86.890. Fix those before submission, and the claim has far fewer ways to fail.

For the wider picture, see how medical billing works from charge to payment. Then book a demo to see how Pabau submits and tracks those claims through Claim.MD.

Continue your research

Want to see how a clearinghouse checks your claims? Claim.MD clearinghouse overview explains how claims are screened and routed before they reach the payer.

Got a CARC on a T86.890 remittance? Denial codes in medical billing explains what the common denial codes mean and how to respond to each.

Sending transplant follow-up claims electronically? 837 file format guide covers the claim loops that carry your diagnosis codes and their order.

Physician documented graft failure instead? ICD-10 code T86.891 covers failure of other transplanted tissue and how it differs from rejection.

Note never says what went wrong with the graft? ICD-10 code T86.899 explains when an unspecified transplant complication code holds up.

Frequently asked questions