CurrentBlue Cross Blue Shield - MassachusettsPolicy 483

483 Manipulation Under Anesthesia Prn

Defines medical necessity, investigational indications, prior authorization rules, and coding related to manipulation under anesthesia for commercial and Medicare products across Blue Cross Blue Shield Massachusetts. Covers MUA for knee arthrofibrosis after total knee arthroplasty and certain acute injuries; spinal and multi-joint MUA for chronic pain is considered investigational.

Policy Summary

PayerBlue Cross Blue Shield - Massachusetts

Policy483 Manipulation Under Anesthesia Prn

Policy CodePolicy 483

Change TypeLiterature review; policy revisions (2023, 2020)

Effective Date

Next Review Date

Key ActionPrecertification/preauthorization IS REQUIRED for all products if the procedure is performed inpatient.

SourceLink

POLICY UPDATE CHANGES

Policy updated with literature review through February 20, 2026; no references added; policy statements unchanged.

Manipulation under Anesthesia for Treatment of Adhesive Capsulitis of the Shoulder was removed from this policy; InterQual criteria will be used for this procedure. Coding information clarified.

New medically necessary indications described for Treatment of Adhesive Capsulitis of the Shoulder and for Treatment of Stiffness after Total Knee Arthroplasty based on expert opinion.

1Medically Necessary Indications (knee arthrofibrosis)

3Investigational Indications Listed

2CPT Codes Mentioned

Coverage Summary

Manipulation under anesthesia (MUA) involves mobilization, stretching, traction and high-velocity short-amplitude thrusts performed while the patient is sedated to break up fibrous and scar tissue, relieve pain, and improve range of motion. It is used for isolated joint conditions (eg, knee arthrofibrosis and historically adhesive capsulitis), for reduction of displaced fractures and joint dislocations, and has been proposed for chronic spinal pain though the evidence is limited and spinal MUA is considered investigational.

Coverage stance for MUA is mixed: knee MUA for arthrofibrosis after total knee arthroplasty (or after ACL reconstruction) and MUA for displaced fractures/dislocations are considered medically necessary when criteria are met; spinal and multi-joint MUA for chronic pain and serial multi-session MUA are considered investigational/not medically necessary.

Affected products and coding: the policy defines medical necessity, investigational indications, prior authorization rules (inpatient precertification required; select outpatient products do not require prior authorization), and coding related to MUA for commercial and Medicare products across Blue Cross Blue Shield Massachusetts. The policy explicitly references CPT code 27570 for knee MUA (covered when criteria met) and CPT code 22505 for spinal MUA (considered investigational).

Key thresholds: Conservative therapy required before knee MUA — acetaminophen and/or NSAIDs for at least 3 weeks and physical therapy/home exercise for at least 6 weeks; and recommended timing for knee MUA is ideally within 3 months of the initial total knee arthroplasty.

Key thresholds and quick facts

Conservative therapy duration before knee MUAAcetaminophen and/or NSAIDs for at least 3 weeks; physical therapy/home exercise program for at least 6 weeks

Recommended timing for knee MUA post-TKAProcedure performed ideally within 3 months of the initial total knee arthroplasty

Policy number483

Scope summaryDefines medical necessity, investigational indications, prior authorization rules, and coding related to manipulation under anesthesia for commercial and Medicare products across Blue Cross Blue Shield Massachusetts. Covers MUA for knee arthrofibrosis after total knee arthroplasty and certain acute injuries; spinal and multi-joint MUA for chronic pain is considered investigational.

Last review2026-05-01

Medically Necessary: Knee Manipulation Under Anesthesia for Arthrofibrosis or After ACL Reconstruction

Covered when ALL of the following criteria are met:

ALL of the following

Pain and stiffness with limited range of motion which significantly interfere with activities of daily living.
Other etiologies of knee pain/stiffness have been excluded by clinical history, physical exam, and appropriate imaging studies (e.g., malpositioned/incorrectly sized arthroplasty components).
Failure of a conservative treatment regimen, including acetaminophen and/or nonsteroidal antiinflammatory drugs (NSAIDs) for at least 3 weeks and physical therapy/home exercise program for at least 6 weeks.Acetaminophen/NSAIDs ≥3 weeks; PT/home exercise ≥6 weeks
Operational recommendation: Procedure performed ideally within 3 months of the initial total knee arthroplasty (recommended timing).

Medically Necessary: Manipulation Under Anesthesia for Displaced Fractures and Joint Dislocations

Covered when the indication is displaced fractures or joint dislocations.

Manipulation under anesthesia for treatment of displaced fractures and joint dislocations.

Investigational / Not Medically Necessary

The following are considered investigational (not medically necessary):

ANY of the following

Spinal manipulation (and manipulation of other joints performed during the procedure) with the patient under anesthesia for chronic spinal (cranial, cervical, thoracic, lumbar), chronic sacroiliac, and pelvic pain.
Spinal manipulation and manipulation of other joints under anesthesia involving serial treatment sessions.
Manipulation under anesthesia involving multiple body joints for treatment of chronic pain.
Knee manipulation under anesthesia in circumstances other than arthrofibrosis following total knee arthroplasty or ACL reconstruction, unless for displaced fractures or joint dislocations.

Coding

Investigational CPT Code (spinal MUA)CPTExperimental

22505

Manipulation of spine requiring anesthesia, any region

Covered CPT Code when medical necessity criteria met (knee MUA)CPTCovered

27570

Manipulation of knee joint under general anesthesia (includes application of traction or other fixation devices)

Diagnosis codes considered medically necessary when submitted with the CPT codes aboveICD-10Covered

M24.661	Ankylosis, right knee
M24.662	Ankylosis, left knee
M24.669	Ankylosis, unspecified knee

Providers should report all services using the most up-to-date industry-standard procedure, revenue, and diagnosis codes, including applicable modifiers; ensure coding (CPT/HCPCS, diagnosis, revenue, and modifiers) is current and accurate when submitting claims for MUA services.

Provider Actions / Prior Authorization

Prior Authorization

Precertification required for inpatient procedures

Precertification/preauthorization IS REQUIRED for all products if the procedure is performed inpatient.

All products if performed inpatient

Prior Authorization

Outpatient prior authorization not required for listed products

For specified Commercial and Medicare products (Commercial Managed Care HMO/POS, PPO/Indemnity, Medicare HMO Blue, Medicare PPO Blue), prior authorization is not required for outpatient procedures.

Commercial Managed Care (HMO and POS)
Commercial PPO and Indemnity

Background and Evidence

Manipulation under anesthesia (MUA) is a series of mobilization, stretching, traction procedures and may include high-velocity, short-amplitude thrusts performed while the patient is sedated (typically with general anesthesia or moderate sedation) to break up adhesions, reduce pain, and improve range of motion. An anesthesiologist is generally in attendance.

Typical indications include isolated joint conditions such as knee arthrofibrosis (including stiffness after total knee arthroplasty or after ACL reconstruction) and historically for adhesive capsulitis of the shoulder; MUA is also used to reduce displaced fractures and joint dislocations.

Manipulation under anesthesia has been proposed and used for chronic spinal, sacroiliac, and pelvic pain, but the evidence is limited (case series, observational and nonrandomized studies) and no randomized controlled trials have been identified; spinal MUA is considered investigational/not medically necessary for chronic spinal pain.

Evidence summary

RCTs identifiedNone for spinal MUA; evidence limited to case series, observational and nonrandomized comparative studies

Literature review datethrough February 20, 2026

Manipulation under anesthesia (MUA): A series of mobilization, stretching, and traction procedures performed while the individual is sedated (usually with general anesthesia or moderate sedation) to break up adhesions and improve range of motion.

Revision History

11/2020material

New medically necessary indications described for Treatment of Adhesive Capsulitis of the Shoulder and for Treatment of Stiffness after Total Knee Arthroplasty; clarified coding information. Effective 11/1/2020.

4/1/2023material

Manipulation under Anesthesia for Treatment of Adhesive Capsulitis of the Shoulder was removed from this policy; InterQual criteria will be used for this procedure. Coding information clarified. Effective 4/1/2023.

5/2026non-materialLatest