Z03 vs Z71.1
Z03 (Encounter for medical observation for suspected diseases and conditions ruled out) compared with Z71.1 (Person with feared health complaint in whom no diagnosis is made), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Z03 carries an Excludes1 note covering Z71.1: “person with feared complaint in whom no diagnosis is made (Z71.1)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. Z71.1 carries an Excludes1 note covering Z03: “medical observation for suspected diseases and conditions proven not to exist (Z03.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| Z03Encounter for medical observation for suspected diseases and conditions ruled out | Z71.1Person with feared health complaint in whom no diagnosis is made | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | Z00-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) |
| Definition | Encounter for medical observation for suspected diseases and conditions ruled out is a non-billable ICD-10-CM category code (Z03). | Person with feared health complaint in whom no diagnosis is made is a billable ICD-10-CM diagnosis code (Z71.1). |
| Includes | This category is to be used when a person without a diagnosis is suspected of having an abnormal condition, without signs or symptoms, which requires study, but after examination and observation, is ruled out. This category is also for use for administrative and legal observation status. | Person encountering health services with feared condition which was not demonstrated Person encountering health services in which problem was normal state 'Worried well' |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources