US · guidance
CMS Pub. 100-04, ch. 4, § 20.6.14
Modifier FX
FX: X-ray taken using film
A. General
Consistent with the requirements set forth in section 1833(t)(16)(F)(i), and in accordance
with provisions allowed under section 1833(t)(16)(F)(iv) of the Act, CMS established
modifier FX to identify imaging services that are x-rays taken using film. As stated in the
CY 2017 OPPS/ASC final rule (81 FR 79729 through 79730), hospitals are required to
use this modifier to report imaging services that are X-rays taken using film effective
January 1, 2017.
B. Effect on Payment
Payment for x-ray services taken using film reported with modifier FX will be reduced by
20 percent effective January 1, 2017. We note that when payment for an x-ray service
taken using film is packaged into the payment for another item or service under the
OPPS, no separate payment for the x-ray service taken using film is made. Accordingly,
the payment reduction in this instance would be 0 percent (that is, 20 percent of $0). All
imaging services that are x-rays are listed in the OPPS Addendum B, which is available
via the Internet on the CMS Web site.
History
(Rev. 11937; Issued: 03-31-23; Effective: 04-01-23; Implementation: 04-03-23)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
d7eabdc06031d5ded9bda6cff78d011ceb6ae69a91b2b6d8a973d4be7d91dc52
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