Does “and” in a FY2027 ICD-10-CM code title require both terms?

No: the word “and” in an ICD-10-CM code title does not always require both named terms to be present. The FY2027 Official Guidelines, I.A.14, say that “and” in a title is read as either “and” or “or.” The rule addresses how to interpret the classification title; it is not a finding that a particular condition exists in a patient's record and does not by itself determine which code should be reported.

This guide covers the U.S. FY2027 ICD-10-CM diagnosis classification. CDC/NCHS lists the FY2027 files for services from October 1, 2026, through September 30, 2027, subject to later official updates. The title rule must be read in that release's complete Index and Tabular List, with the relevant date and setting established first.

Imagine a purely abstract title written as “A and B.” The convention tells you not to reject that title solely because the documented term is A alone or B alone: the word in the title may encompass A, B, or both. The letters are a reading illustration, not an actual diagnosis, code, or substitute for the official entry. Whether any real documented condition belongs under a particular title remains a separate lookup and qualified review question.

The official guideline includes its own classification example. For any real entry, read that example in the source rather than copying a summary into a case. Check the actual title, its surrounding hierarchy, and any inclusion or exclusion notes in the released FY2027 Tabular List. A broad title may have more precise child entries or inherited instructions that the title alone cannot show.

The stated I.A.14 convention is specifically about “and” when it appears in a title. Do not apply it automatically to every conjunction in a clinical note, an Alphabetic Index instruction, or an unrelated sentence on a webpage. A coder still needs the documented diagnosis and the correct Index path. Under I.B.1, the candidate found in the Alphabetic Index must be verified in the Tabular List, including instructional notations and any required characters.

This is different from the “with”/“in” convention, which concerns a presumed relationship only when the classification links two documented conditions in defined places. “And” in a code title changes how the title is read; it does not presume a causal relationship. The punctuation guide addresses still another issue: the meaning of brackets, parentheses, colons and Index commas depends on location.

1. Fix the release and date. Confirm that the FY2027 ICD-10-CM files apply to the work being reviewed.
2. Start with the documented term. Use the versioned FY2027 Alphabetic Index and follow its main term, subterms and cross-references. Do not infer an undocumented second term from the code title.
3. Open the entire Tabular entry. Read the exact title in the FY2027 Tabular List, the category and parent notes, child entries, exclusions and any required additional characters.
4. Interpret only the title's “and.” Apply I.A.14 to avoid a too-narrow reading of that title, while keeping the record's documented facts separate.
5. Review the complete candidate. Use I.B.1 and the full source instructions; send any patient-specific assignment or ambiguity for qualified human review.

Diagram-ready takeaway: documented term → Index path → full FY2027 title (“and” may cover either or both) → Tabular instructions → reviewed decision. The available Android, iPhone and Mac apps can help reopen a versioned reference during that check; the official files remain the authority.

• Demanding both terms solely because the title says “and.” That is narrower than the I.A.14 reading rule.
• Adding a term to the medical record from the title. A code title is classification text, not independent clinical documentation. The source rule does not supply a missing diagnosis.
• Stopping at a search snippet. A snippet may omit the surrounding category, subdivisions, notes and required characters. Verify the candidate through the official FY2027 source package.

If a title seems surprisingly broad, keep a review note with the release, Index path, full Tabular location and the exact documentation actually present. Our Index-to-Tabular guide provides the general navigation pattern. This audit trail makes the title interpretation reviewable without turning a convention into unsupported case advice.