Orthopedics
Orthopedic prior authorization: which rule applies to which claim
For orthopedic and spine work it depends on the program and the setting. Cervical fusion with disc removal has needed Medicare prior authorization in hospital outpatient departments since 1 July 2021. CMS’s WISeR model adds cervical fusion and knee arthroscopy for osteoarthritis in six states from 2026. Medicare Advantage plans run their own lists, and from 1 January 2026 must decide a standard request within 7 calendar days. A prior authorization seat is $1,900 a month.
Original Medicare: cervical fusion in the hospital outpatient department
Cervical fusion with disc removal is one of the categories in 42 CFR 419.83 that need prior authorization for service dates on or after 1 July 2021. CMS’s code list includes 22551, anterior interbody arthrodesis with discectomy and decompression, cervical below C2.
The program covers hospital outpatient department claims billed on a type of bill 13x. CMS’s FAQ says offices, critical access hospitals and ASCs billing on other types of bill are not required to submit requests under it. Standard decisions take 7 calendar days for requests submitted on or after 1 January 2025.
Source: 42 CFR 419.83, the list of OPD services requiring prior authorization (eCFR) · CMS, list of OPD services that require prior authorization (PDF) · CMS, OPD prior authorization frequently asked questions (14 November 2024) · CMS, prior authorization for certain hospital OPD services (program page)
WISeR: six states, more settings
From 1 January 2026 to 31 December 2031, CMS’s WISeR model runs in New Jersey, Ohio, Oklahoma, Texas, Arizona and Washington, and reaches hospital outpatient departments, ASCs, the office and the home. Its list includes cervical fusion (LCDs L39741, L39758 and L39793), knee arthroscopy for knee osteoarthritis and electrical nerve stimulator implants. Codes already under the OPD program are excluded, and providers choose prior authorization or a post-service, pre-payment review.
Source: CMS Innovation Center, WISeR model · CMS, WISeR provider fact sheet (PDF)
Medicare Advantage: what CMS-4201-F changed
The 2024 Medicare Advantage rule took effect on 5 June 2023 and applies to coverage from 1 January 2024. MA plans must follow national and local coverage determinations and Traditional Medicare’s coverage conditions. They may use their own criteria only where those are not fully established, and the criteria must be public and based on current evidence.
Prior authorization may only be used to confirm a diagnosis or other medical criteria, or that a service is medically necessary. An approval for a course of treatment must stay valid for as long as it is medically necessary to avoid disrupting care.
A patient who joins an MA plan in the middle of an active course of treatment gets a transition period of at least 90 days, including someone new to the plan or new to Medicare. An active course means the patient is actively seeing the provider and following the treatment.
Source: Federal Register, 88 FR 22120 (CMS-4201-F, 12 April 2023) · CMS fact sheet, 2024 Medicare Advantage and Part D final rule (CMS-4201-F) · 42 CFR 422.101, Medicare Advantage coverage criteria (eCFR) · 42 CFR 422.112, Medicare Advantage continuity of care (eCFR)
The 2026 decision clock, and who it does not cover
Under CMS-0057-F, impacted payers must send prior authorization decisions within 72 hours for expedited requests and 7 calendar days for standard ones. For Medicare Advantage the regulation reads from 1 January 2026; for Medicaid managed care, for rating periods starting on or after that date.
The impacted payers are Medicare Advantage organizations, state Medicaid and CHIP fee-for-service programs, Medicaid managed care plans, CHIP managed care entities and Qualified Health Plan issuers on the federally facilitated exchanges, which are excluded from the timeframe provision. Employer-sponsored commercial plans are not on that list. Drugs are outside the rule. From 2026 a denial must carry a specific reason, and the API requirements follow from January 2027.
Source: CMS fact sheet, Interoperability and Prior Authorization final rule (CMS-0057-F) · 42 CFR 422.568, Medicare Advantage standard decision timeframes (eCFR) · 42 CFR 422.572, Medicare Advantage expedited decisions (eCFR) · 42 CFR 438.210, Medicaid managed care authorization timeframes (eCFR)
What a prior authorization seat does for an orthopedic practice
One full-time person, $1,900 a month, in your own systems and payer portals on US business hours.
- Sorts each scheduled case by payer, program and setting before the date is booked
- Builds the request with imaging, conservative-care history and the surgeon’s notes
- Watches the 72-hour and 7-day clocks on Medicare Advantage and Medicaid managed care requests and escalates when they run out
- Records the specific denial reason a payer must now give, and routes it to your team
- Flags the 90-day transition rule when a new MA enrollee is mid-treatment
- Arguing medical necessity: that is the surgeon’s, including on a peer-to-peer
- A promised approval or turnaround: the payer decides
Questions
Does an ASC need Medicare prior authorization for cervical fusion?
Not under the hospital outpatient department program, which covers hospital OPD claims only. In the six WISeR states, cervical fusion is on the model’s list for settings that include ASCs, except codes already under the OPD program. Medicare Advantage and commercial plans set their own rules.
How long can a Medicare Advantage plan take on a standard prior authorization request?
From 1 January 2026, 7 calendar days after receiving the request (42 CFR 422.568). An expedited request must be decided no later than 72 hours after it is received (42 CFR 422.572).
Does the 7-day rule apply to commercial insurance?
CMS-0057-F names its impacted payers: Medicare Advantage, Medicaid and CHIP fee-for-service, Medicaid managed care, CHIP managed care and exchange plans, which are excluded from the timeframes. Employer-sponsored plans are not on the list; their contracts and state law govern.
Can an MA plan make a new member restart prior authorization mid-treatment?
The rule gives a transition period of at least 90 days for any active course of treatment when someone enrolls in an MA plan after starting it, including people new to the plan or new to Medicare.
What does an orthopedic prior authorization seat cost?
$1,900 a month for one full-time person, one month minimum, no setup fee, working from Rawalpindi, Pakistan, on US business hours inside your own systems.
A research summary, not legal, coding or coverage advice. Payer policy and the applicable LCD govern any individual claim; every rule above links to the document it came from so you can check it rather than trust it.
Sources
- 42 CFR 419.83, the list of OPD services requiring prior authorization (eCFR)
- CMS, list of OPD services that require prior authorization (PDF)
- CMS, OPD prior authorization frequently asked questions (14 November 2024)
- CMS, prior authorization for certain hospital OPD services (program page)
- CMS Innovation Center, WISeR model
- CMS, WISeR provider fact sheet (PDF)
- Federal Register, 88 FR 22120 (CMS-4201-F, 12 April 2023)
- CMS fact sheet, 2024 Medicare Advantage and Part D final rule (CMS-4201-F)
- 42 CFR 422.101, Medicare Advantage coverage criteria (eCFR)
- 42 CFR 422.112, Medicare Advantage continuity of care (eCFR)
- CMS fact sheet, Interoperability and Prior Authorization final rule (CMS-0057-F)
- 42 CFR 422.568, Medicare Advantage standard decision timeframes (eCFR)
- 42 CFR 422.572, Medicare Advantage expedited decisions (eCFR)
- 42 CFR 438.210, Medicaid managed care authorization timeframes (eCFR)
Sources checked 9 October 2026.
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