1. Z17 Estrogen receptor status

    1. Z17.0 Estrogen receptor positive status [ER+]

    2. Z17.1 Estrogen receptor negative status [ER-]

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.