Y92.140 (Kitchen in prison as the place of occurrence of the external cause)
compared with
Y92.149 (Unspecified place in prison as the place of occurrence of the external cause),
from the official CMS tabular data.
Summary
These codes represent different levels of specificity within category Y92: Y92.140 is the more specific code and Y92.149 is the unspecified one.
MedCoder-derived
What is different?
Title wording.The titles share “in prison as the place of occurrence of the external cause”; Y92.140 says “Kitchen” where Y92.149 says “Unspecified place”.
Registry fact
Can these codes be reported together?
Not ordinarily.Y92.140 is the more specific code and Y92.149 is the unspecified one, in the same category. When the documentation supports the more specific code, the unspecified code is not added for the same condition (ICD-10-CM Official Guidelines, Section I.B.18).
None.Neither entry carries an Excludes1 note that names the other code.
Official rule
Is there an Excludes2 relationship?
None.Neither entry carries an Excludes2 note that names the other code.
Official rule
Is one more specific?
Yes.Y92.140’s title names the condition; Y92.149’s title is the unspecified form (“Unspecified place in prison as the place of occurrence of the external cause”).
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
Kitchen in prison as the place of occurrence of the external cause
What we found
Not ordinarily reported together for the same condition. No Excludes1/Excludes2 relationship is listed between Y92.149 and Y92.140, but they describe overlapping diagnoses in the same category (Both are children of the same Y92 category.).
When documentation supports the more specific code, the unspecified code should generally not be added for the same condition (ICD-10-CM Official Guidelines, Section I.B.18).
What to review
When the documentation supports the more specific code, report it and leave the unspecified code off for the same condition.
No Excludes note links these codes, but they describe overlapping diagnoses and one of them is unspecified. When documentation supports the more specific code, the unspecified code should generally not be added for the same condition.
Source / rule
ICD-10-CM Official Guidelines, Section I.B.18
Official guidance behind these answers
Section I.B.18 — Use of Sign/Symptom/Unspecified Codes · applies to: Unspecified codes
Sign/symptom and “unspecified” codes have acceptable, even necessary, uses. While specific diagnosis codes should be reported when they are supported by the available medical record documentation and clinical knowledge of the patient’s health condition, there are instances when signs/symptoms or unspecified codes are the best choices for accurately reflecting the healthcare encounter. Each healthcare encounter should be coded to the level of certainty known for that encounter. As stated in the introductory section of these official coding guidelines, a joint effort between the healthcare provider and the coder is essential to achieve complete and accurate documentation, code assignment, and reporting of diagnoses and procedures. The importance of consistent, complete documentation in the medical record cannot be overemphasized. Without such documentation accurate coding cannot be achieved. The entire record should be reviewed to determine the specific reason for the encounter and the conditions treated. If a definitive diagnosis has not been established by the end of the encounter, it is appropriate to report codes for sign(s) and/or symptom(s) in lieu of a definitive diagnosis. When sufficient clinical information isn’t known or available about a particular health condition to assign a more specific code, it is acceptable to report the appropriate “unspecified” code (e.g., a diagnosis of pneumonia has been determined, but not the specific type). […]
ICD-10-CM Official Guidelines FY2026
Section I.B.2 — Level of Detail in Coding · applies to: Level of detail
Diagnosis codes are to be used and reported at their highest number of characters available and to the highest level of specificity documented in the medical record. ICD-10-CM diagnosis codes are composed of codes with 3, 4, 5, 6 or 7 characters. Codes with three characters are included in ICD-10-CM as the heading of a category of codes that may be further subdivided by the use of fourth and/or fifth characters and/or sixth characters, which provide greater detail. A three-character code is to be used only if it is not further subdivided. A code is invalid if it has not been coded to the full number of characters required for that code, including the 7th character, if applicable.
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
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