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Z86.73 vs Z87.892

Z86.73 (Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits) compared with Z87.892 (Personal history of anaphylaxis), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because Z86.73 lists Z87.892 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

Title wording.The titles share “Personal history of”; Z86.73 says “transient ischemic attack (TIA), and cerebral infarction without residual deficits” where Z87.892 says “anaphylaxis”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.Z86.73 lists Z87.892 under Excludes2: “personal history of anaphylactic shock (Z87.892)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. Z86.73 carries 2 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.Z86.73’s tabular entry: “personal history of anaphylactic shock (Z87.892)”. The note covers Z87.892.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

No.Both are billable codes, and neither contains the other.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

Z86.73
Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits
↔
Z87.892
Personal history of anaphylaxis

What we found

Yes, when both are documented.Z86.73 carries an Excludes2 note covering Z87.892: “personal history of anaphylactic shock (Z87.892)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2026

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

Z86.73Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficitsZ87.892Personal history of anaphylaxis
Billing statusBillableBillable
ClassificationZ00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
DefinitionPersonal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits is a billable ICD-10-CM diagnosis code (Z86.73).Personal history of anaphylaxis is a billable ICD-10-CM diagnosis code (Z87.892).
Includes
Personal history of prolonged reversible ischemic neurological deficit (PRIND)
Personal history of stroke NOS without residual deficits
—
Excludes1
personal history of traumatic brain injury (Z87.820)
sequelae of cerebrovascular disease (I69.-)
—
Excludes2
old myocardial infarction (I25.2)
personal history of anaphylactic shock (Z87.892)
postmyocardial infarction syndrome (I24.1)
personal history of self harm (Z91.5-)
Code first
any follow-up examination after treatment (Z09)
any follow-up examination after treatment (Z09)
Code also
any follow-up examination (Z08-Z09)
allergy status such as:
allergy status to drugs, medicaments and biological substances (Z88.-)
allergy status, other than to drugs and biological substances (Z91.0-)
any follow-up examination (Z08-Z09)

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

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Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources