T78.01XS ICD-10-CM Code: Anaphylactic reaction due to peanuts, sequela
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 922 — OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITH MCC (MDC 21)
- MS-DRG 923 — OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITHOUT MCC (MDC 21)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T78.01XS in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- complications of surgical and medical care NEC (T80-T88)
Code Also
Additional codes that may be required to fully describe the encounter.
- Code also, if applicable, place of occurrence, such as:
- highway rest stop (Y92.523)
- school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
- service areas as the place of occurrence of the external cause (Y92.52-)
- single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
- transport vehicle as the place of occurrence of the external cause (Y92.81-)
Frequently Asked Questions (FAQ) & Clinical Guidance
Does T78.01XS require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T78.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T78.01XS in its code family, with their registry titles.
- T78.00XD — Anaphylactic reaction due to unspecified food, subsequent encounter
- T78.00XS — Anaphylactic reaction due to unspecified food, sequela
- T78.01 — Anaphylactic reaction due to peanuts
- T78.01XA — Anaphylactic reaction due to peanuts, initial encounter
- T78.01XD — Anaphylactic reaction due to peanuts, subsequent encounter
- T78.02 — Anaphylactic reaction due to shellfish (crustaceans)
- T78.02XA — Anaphylactic reaction due to shellfish (crustaceans), initial encounter
- T78.02XD — Anaphylactic reaction due to shellfish (crustaceans), subsequent encounter
- T78.02XS — Anaphylactic reaction due to shellfish (crustaceans), sequela
- T78.03 — Anaphylactic reaction due to other fish