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T80.311A

T80.311A: ABO incompatibility with delayed hemolytic transfusion reaction, initial encounter

Billable / specific codeICD-10-CM

T80.311A is a billable, specific ICD-10-CM code for abo incompatibility with delayed hemolytic transfusion reaction, initial encounter. It is valid for submission on a claim.

Check T80.311A with the rest of the claim: free scrubber

7th character "A": initial encounter

The appropriate 7th character is to be added to each code from category T80

A
initial encounter
D
subsequent encounter
S
sequela

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • ABO incompatibility with hemolytic transfusion reaction 24 hours or more after transfusion
  • Delayed hemolytic transfusion reaction (DHTR) due to ABO incompatibility

Excludes1 inherited from the categories above T80.311A

A category’s note binds every code beneath it.

Written on T80.3: ABO incompatibility reaction due to transfusion of blood or blood products

  • minor blood group antigens reactions (Duffy) (E) (K) (Kell) (Kidd) (Lewis) (M) (N) (P) (S) (T80.A-)

Excludes2 inherited from the categories above T80.311A

Not part of this code, but both may be coded when both are present.

Written on T80: Complications following infusion, transfusion and therapeutic injection

  • bone marrow transplant rejection (T86.01)
  • febrile nonhemolytic transfusion reaction (R50.84)
  • fluid overload due to transfusion (E87.71)
  • posttransfusion purpura (D69.51)
  • transfusion associated circulatory overload (TACO) (E87.71)
  • transfusion (red blood cell) associated hemochromatosis (E83.111)
  • transfusion related acute lung injury (TRALI) (J95.84)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

T80.311A is named in 1 Medicare coverage policy: 1 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56612Billing and Coding: CT of the Head

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under T80.311

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.