Coding and coverage · ICD-10-CM
T50.Z1 Poisoning by, adverse effect of and underdosing of immunoglobulin
This code needs a 7th character (use X as a placeholder for missing characters).
Codes under this one
- T50.Z11 Poisoning by immunoglobulin, accidental (unintentional)Header
- T50.Z12 Poisoning by immunoglobulin, intentional self-harmHeader
- T50.Z13 Poisoning by immunoglobulin, assaultHeader
- T50.Z14 Poisoning by immunoglobulin, undeterminedHeader
- T50.Z15 Adverse effect of immunoglobulinHeader
- T50.Z16 Underdosing of immunoglobulinHeader
Instructional notes
Chapter 19
Excludes2Not included here: the patient may have both; report both when both are present.
Use additional codeAdd a second code for the full picture.
- code to identify any retained foreign body, if applicable (Z18.-)
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
T50
7th charactersThe appropriate 7th character is to be added to each code from category T50
- A initial encounter
- D subsequent encounter
- S sequela
Chapter 19: Injury, poisoning and certain other consequences of external causes · T07-T88 Injury, poisoning and certain other consequences of external causes (T07-T88)
Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.
Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.