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.

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

Personal history of traumatic brain injury is a billable ICD-10-CM diagnosis code (Z87.820).

Sequencing, inclusion, and exclusion notes published for Z87.820 in the official ICD-10-CM tabular list.

Conditions that can never be reported with this code; the two are mutually exclusive.

personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits (Z86.73)

Conditions not covered by this code, but which may be reported alongside it when both are present.

Underlying conditions that must be sequenced before this code.

Additional codes that may be required to fully describe the encounter.

Official ICD-10-CM classifications closest to Z87.820 in its code family, with their registry titles.

Z87.790 — Personal history of (corrected) congenital malformations of face and neck
Z87.798 — Personal history of other (corrected) congenital malformations
Z87.8 — Personal history of other specified conditions
Z87.81 — Personal history of (healed) traumatic fracture
Z87.82 — Personal history of other (healed) physical injury and trauma
Z87.821 — Personal history of retained foreign body fully removed
Z87.828 — Personal history of other (healed) physical injury and trauma
Z87.89 — Personal history of other specified conditions
Z87.890 — Personal history of sex reassignment
Z87.8901 — Personal history of social gender transition

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.