A27 (Leptospirosis)
compared with
A65-A69 (Other spirochetal diseases (A65-A69)),
from the official CMS tabular data.
Summary
These codes can be reported together when both conditions are documented, because A65-A69 lists A27 under Excludes2, which marks them as distinct conditions.
Official rule
What is different?
The conditions named.A27 is “Leptospirosis”; A65-A69 is “Other spirochetal diseases (A65-A69)”.
Registry fact
Can these codes be reported together?
Yes, when both are documented.A65-A69 lists A27 under Excludes2: “leptospirosis (A27.-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.
Not comparable.The codes sit in different categories; specificity is only comparable within one category.
Is one a parent or header code?
Both are headers.Both are non-billable headers, 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
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 FY2027
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
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