Skip to main content

Orthopaedics · UK

Shoulder decompression surgery - only when it will actually help.

Arthroscopic subacromial decompression - bursectomy, acromioplasty and coracoacromial ligament release - by a consultant upper-limb surgeon.

See indicative pricing
A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Indicative pricing

What private shoulder decompression costs in the UK.

Indicative ranges across our partner upper-limb units in 2026, with physiotherapy as an add-on package.

In short

£5,500–£9,000, home the same day.

Procedure Indicative range
Arthroscopic subacromial decompression (ASD) £5,500–£9,000
ASD with rotator cuff repair £8,500–£13,500
ASD with AC joint excision (Mumford) £6,500–£10,500
Image-guided subacromial injection (pre-op) £450–£850
Structured shoulder physiotherapy (12 sessions) £720–£1,320
Orthopaedic consultation £250–£350
MRI shoulder (if indicated) £450–£850

Prices vary by hospital, surgeon, and whether an AC joint excision or cuff repair is added. On the NHS, ASD is available but access has tightened since the CSAW trial - most trusts now require documented failure of physiotherapy and injections, and NHS waits are commonly 6–18 months in 2026.

The problem

The most over-done shoulder operation of the last twenty years - and how to avoid being on the wrong end of it.

Subacromial decompression is where private orthopaedics has quietly over-delivered - theatre lists booked before physiotherapy has had a real chance, and before the CSAW evidence was taken on board.

  • Non-operative first - and properly

    A structured scapular-focused physio programme and one or two well-placed image-guided injections, before anyone talks about theatre.

  • Use the diagnostic block

    If a targeted lidocaine injection into the subacromial space does not abolish the pain, decompression is unlikely to help. This one test saves patients from bad operations.

  • Read CSAW honestly

    The 2018 Lancet trial and the 2019 FIMPACT trial did not kill ASD - but they did narrow it. We only recommend surgery where the case fits the small group who genuinely benefit.

When it helps

When subacromial decompression is the right step.

The situations where ASD still genuinely earns its place, plus the red flag that means an urgent cuff conversation rather than a routine decompression list.

  • True impingement with a hooked (Bigliani III) acromion

    A painful arc with imaging that shows a downward-hooked acromion pressing on the bursa and cuff - the classic mechanical case where decompression genuinely helps.

  • Chronic subacromial bursitis

    Thickened, inflamed bursa on MRI or ultrasound that has failed to settle after image-guided injection and structured physiotherapy.

  • Calcific tendinopathy needing washout

    A calcific deposit in the supraspinatus that has failed barbotage - decompression with excision of the deposit is a well-established option.

  • Alongside a rotator cuff repair

    Where a partial or small full-thickness cuff tear is being repaired, decompression is often done at the same sitting to remove the offending spur and inflamed bursa.

  • Failed conservative treatment (6+ months)

    At least six months of physiotherapy, activity modification and one or two properly placed image-guided injections without meaningful benefit.

  • Symptomatic os acromiale

    An unfused acromial ossicle causing mechanical symptoms - an uncommon but recognised indication where selective decompression can help.

  • AC joint arthritis with inferior osteophyte

    A downward-pointing spur off the AC joint that impinges the cuff - decompression with a Mumford (AC joint excision) is the usual combined procedure.

  • Red flag: sudden weakness after a fall

    New, dramatic loss of active elevation after trauma suggests an acute rotator cuff tear - this needs an urgent MRI and a repair conversation, not a decompression list.

Procedure options

Extent and combination depend on what is actually driving the pain.

What each option involves - bursectomy alone, formal acromioplasty, coracoacromial ligament release, and the common combinations with AC joint excision or cuff repair.

  • Arthroscopic subacromial decompression (ASD)

    The standard technique. Two or three keyhole portals, bursectomy, acromioplasty and coracoacromial ligament release. Day-case, 30–60 minutes, small scars.

  • Bursectomy alone

    For inflamed bursa without a hooked acromion - remove the bursa, leave the bone. Some surgeons prefer this minimalist option in flat-acromion (Bigliani I) shoulders.

  • Acromioplasty

    Shaving the undersurface of the acromion where it hooks downward (Bigliani II curved, III hooked). The bony step that gives the operation its old name of “subacromial decompression”.

  • Coracoacromial ligament release

    Division or release of the ligament that forms the roof of the subacromial space. Done selectively - a wholesale release can destabilise cuff-deficient shoulders.

  • ASD with AC joint excision (Mumford)

    Where the AC joint is arthritic and throwing an osteophyte into the subacromial space, the outer end of the clavicle is trimmed at the same sitting.

  • ASD with rotator cuff repair

    A partial or small full-thickness cuff tear repaired arthroscopically, with decompression as the enabling step. Recovery is dictated by the cuff repair, not the decompression.

  • Calcific deposit excision with decompression

    For refractory calcific tendinopathy - the calcium deposit is located, needled and evacuated, with bursectomy and often a limited acromioplasty.

  • Open decompression

    Historical technique through a small deltoid split, now rare. Reserved for cases where arthroscopy is not feasible or hardware is being addressed.

Safety and evidence

What to expect afterwards - and the CSAW conversation, honestly.

ASD is a low-risk operation technically.

  • GA with interscalene block, in a proper theatre

    The block controls pain for 12–18 hours and lets you start moving the same day. Day-case is the norm for isolated decompression.

  • The CSAW question - will it actually help you?

    The 2018 CSAW trial in The Lancet found arthroscopic subacromial decompression added little over diagnostic arthroscopy or non-operative care for many patients. We take that seriously and only recommend surgery where the case is genuinely mechanical.

  • Persistent pain despite technically good surgery

    Around 10–20 percent of decompressions do not deliver the pain relief patients hoped for, often because the pain was cuff-driven or centrally sensitised rather than truly mechanical.

  • Bleeding and haemarthrosis

    A small bleed into the subacromial space is common; a symptomatic haemarthrosis needing aspiration is under 2 percent.

  • Infection

    Deep infection under 0.5 percent for arthroscopic work. Any spreading redness, fever above 38, or wound discharge needs the same-day team, not a routine call.

  • Stiffness (secondary frozen shoulder)

    Around 5–10 percent of patients develop post-operative stiffness in the first few months. Early gentle range-of-motion physiotherapy is the best prevention.

  • Nerve injury

    Axillary and suprascapular nerve injury are rare (well under 1 percent) but recognised. Numbness in the deltoid patch or scapular weakness needs review.

  • Deltoid detachment

    A specific concern in over-zealous acromioplasty - the origin of the deltoid can be compromised. This is why the amount of bone removed is deliberately conservative.

  • Red flags after surgery

    Fever, spreading redness, calf pain, breathlessness, new hand weakness or numbness that fails to settle after 24 hours need the same-day team or A&E.

Reading your operation note

Your operation note in four parts. Read the last one first.

Whether the surgeon did a straight bursectomy, a formal acromioplasty, or added a Mumford or cuff repair, the note keeps to the same shape.

A UK consultant shoulder surgeon reviewing a patient's operation notes

A quiet reminder

The Impression section is where the physio protocol and pain trajectory live - read it first.

If you would like us to talk you through the operation note before your first physio session, just ask.

  1. 01 Header

    Indication, side and acromial morphology

    Confirmed subacromial impingement, which side, and the Bigliani grade (I flat, II curved, III hooked) that justified the decompression.

  2. 02 Technique

    Bursectomy, acromioplasty, CA ligament

    What was done - bursectomy, how much acromial bone was resected, whether the coracoacromial ligament was released, and any concurrent Mumford or cuff work.

  3. 03 Findings

    Intra-articular and subacromial findings

    State of the bursa, undersurface of the cuff, biceps tendon, AC joint and cartilage. This is where a previously unsuspected cuff tear is documented.

  4. 04 Impression

    Post-op protocol and honest prognosis

    Read this first: sling instructions, physio schedule, expected pain trajectory and a note on what to do if pain has not settled at 3 months.

Recognised by major UK insurers

BupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealix

Subacromial decompression is usually covered where a documented non-operative trial has failed and imaging supports a mechanical case.

Frequently asked

Everything we get asked about shoulder decompression.

Quick answers on technique, evidence, recovery and cost.

  • What actually happens during subacromial decompression?

    Under general anaesthetic with a nerve block, the surgeon makes two or three small keyhole incisions around the shoulder. A camera is placed in the subacromial space. The inflamed bursa is trimmed away (bursectomy), the undersurface of any hooked acromion is shaved smooth (acromioplasty) and the coracoacromial ligament may be selectively released. The whole procedure typically takes 30 to 60 minutes and most patients go home the same day.

  • Does subacromial decompression actually work? What does the evidence say?

    This is the honest question. The 2018 CSAW trial published in The Lancet, and the 2019 FIMPACT trial, found that arthroscopic subacromial decompression was no better than a placebo arthroscopy or a structured non-operative programme for many patients with impingement pain. NICE and the BESS pathway now recommend a proper non-operative trial first, and reserving ASD for carefully selected cases - typically a mechanical, spur-driven picture in a patient whose diagnostic lidocaine injection clearly abolishes pain. We follow that pathway.

  • How is this different from shoulder arthroscopy, arthrolysis or a cuff repair?

    Shoulder arthroscopy is the umbrella term for any keyhole shoulder procedure. Arthrolysis is the release of a stiff, frozen shoulder capsule. Rotator cuff repair reattaches a torn tendon. Subacromial decompression is specifically about creating more space above the cuff by removing bursa and, where indicated, a hooked spur. They are often combined but they are not the same operation.

  • What does private ASD cost in the UK in 2026?

    If a rotator cuff repair is done at the same sitting, expect £8,500 to £13,500. An AC joint excision (Mumford) adds around £1,000. Physiotherapy is an additional £720 to £1,320 for a 12-session package.

  • Can I get subacromial decompression on the NHS?

    Yes, but access has tightened since CSAW. Most integrated care boards now require documented failure of at least 3–6 months of physiotherapy and one or two image-guided injections before referral, and many will not fund ASD without evidence of a hooked acromion, a diagnostic block that abolishes pain, or a concurrent cuff repair. NHS waits for shoulder surgery are commonly 6–18 months in 2026, which is why patients choose the private route where they meet strict criteria.

  • How long is recovery and when can I return to work and sport?

    Desk work in 1–2 weeks. Driving when you can perform an emergency stop without pain, usually 2–3 weeks. Manual work and overhead sport typically 6–12 weeks. If a cuff repair was done at the same time, the timeline is dictated by the repair - sling for 4–6 weeks, no overhead loading for 3 months, full return at 4–6 months.

Related treatments

Looking for something else?