A coworker complained of the sudden onset of chest pain and was admitted. A myocardial infarction was ruled out. You would code

According to the ICD-10-CM Official Guidelines for Coding and Reporting, signs and symptoms are appropriate for coding when a related definitive diagnosis has not been established or confirmed by the provider. In this case, the patient presented with chest pain, and the suspected diagnosis of a myocardial infarction (MI) was definitively "ruled out." Since the scenario does not provide an alternative established diagnosis, the coder must report the sign or symptom that prompted the encounter. Therefore, coding only the chest pain is the correct procedure. Coding a condition that has been ruled out is a violation of standard coding principles.

A. The myocardial infarction was explicitly ruled out; therefore, it cannot be coded as if it were an established condition.
B. It is incorrect to code a condition that has been ruled out. The MI should not be coded at all.
C. "Impending myocardial infarction" is a specific diagnosis (e.g., unstable angina) that was not documented or established in the scenario.

1. National Center for Health Statistics. (2023). ICD-10-CM Official Guidelines for Coding and Reporting FY 2024. Centers for Disease Control and Prevention.

Section I.B.4: "Codes that describe symptoms and signs

as opposed to diagnoses

are acceptable for reporting purposes when a related definitive diagnosis has not been established (confirmed) by the provider."

Section IV.H: "Do not code diagnoses documented as 'probable'

'suspected'

'questionable'

'rule out'

or 'working diagnosis' or other similar terms indicating uncertainty. Rather

code the condition(s) to the highest degree of certainty for that encounter/visit

such as symptoms

signs

abnormal test results

or other reason for the visit." (This applies to outpatient settings

and the principle of not coding a "ruled out" condition is universal).

2. Leon-Chisen

N. (2023). ICD-10-CM and ICD-10-PCS Coding Handbook with Answers. American Hospital Association (AHA) Press.

Chapter 2

General Coding Guidelines

Section on Signs and Symptoms: This section explains that if the signs and symptoms are not part of a disease process that has been diagnosed

they should be coded. When a suspected condition is ruled out

the reason for the encounter (the symptom) is coded.

3. Johns

M. L. (2021). Health Information Management Technology: An Applied Approach (6th ed.). AHIMA Press.

Chapter 6

Clinical Classification Systems

Section on ICD-10-CM Coding Conventions and Guidelines: This chapter details the fundamental rule that coders should not assign a code for a condition that the physician has specifically documented as "ruled out." The coder should instead code the existing signs or symptoms.