US · guidance
CMS Pub. 100-04, ch. 32, § 240.2
Billing Instructions for Physicians and Non-Physician Practitioners
The KX modifier is to be billed on the detail line only with the procedure code(s) that is
gender specific for transgender, ambiguous genitalia, and hermaphrodite beneficiaries.
(NOTE: The KX modifier is a multipurpose informational modifier, and may also be used in
conjunction with other medical policies.)
History
(Rev. 1877, Issued: 12-18-09, Effective: 04-01-10, Implementation: 04-05-10)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
58836234b11b33f594465202b9828039e26293c200ada9abc2a5aac5d53ef907
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