US · guidance
CMS Pub. 100-08, ch. 3, § 3.10.2
Prior Authorization Process for Certain Hospital Outpatient
Department (OPD) Services
(Rev. 937; Issued: 01-31-20; Effective: 03-02-20; Implementation: 03-02-20)
A prior authorization process for certain hospital OPD services is described in 42 CFR
§§419.80 through 419.89 as a method for controlling unnecessary increases in the
volume of covered services. These sections establish requirements for the submission
of a prior authorization request (PAR), the timeframes for the review of a PAR, and the
process for CMS to exempt providers from prior authorization requirements.
The list of hospital OPD services requiring prior authorization will be updated through
formal notice-and-comment rulemaking. Technical updates to the list of services,
such as changes to the name of the service or the HCPCS code, will be published on
the CMS website.
The CMS may elect to exempt a provider from this prior authorization process upon a
provider’s demonstration of compliance with Medicare coverage, coding, and payment
rules after semiannual assessments. Providers must reach a prior authorization
provisional affirmation threshold of 90 percent or greater to be eligible for exemption.
The CMS may suspend the outpatient department services prior authorization process
requirements generally or for a particular service(s) at any time by issuing notification
on the CMS website.
History
(Rev. 937; Issued: 01-31-20; Effective: 03-02-20; Implementation: 03-02-20)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
8502fdd758d26bd6b620dfddffc94519e0f4fc5fe420284f31b8027105fbae0a
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