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Subacromial Decompression - the narrow-focus, arthroscopic technique.

A narrow arthroscopic operation that trims bone and bursa from under the acromion - chosen only where a proper trial of physio, injections and shared-decision review has been done first.

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 subacromial decompression costs privately in the UK.

Indicative ranges across our partner units.

In short

Arthroscopic ASD as a day case: £4,800–£7,500, home the same evening.

Service Indicative range
Arthroscopic subacromial decompression (day-case) £4,800–£7,500
ASD with acromioclavicular joint excision £5,500–£8,500
ASD with partial-thickness cuff debridement £5,200–£8,000
Subacromial injection (ultrasound guided) £280–£450
Shoulder surgeon consultation £220–£350
MRI shoulder (non-contrast) £320–£520
Physio bundle (8 sessions) £560–£1,120

Subacromial decompression is usually covered where a documented non-operative trial has been done.

The problem

Not every impingement needs bone shaved.

The CSAW trial changed shoulder practice. Decompression works for some, not all. The judgement is who - and only after a real non-operative trial.

  • Trial-of-treatment first

    Twelve weeks of graded physio and at least one injection, before theatre is on the table.

  • Right morphology, right symptoms

    A type-III acromion on MRI plus a painful arc with positive Neer and Hawkins is the group most likely to benefit.

  • Do not conflate with cuff repair

    A full-thickness tear is a cuff-repair problem. Decompression alone will not fix it.

When it helps

The situations where this is the right step.

The situations we see most, plus the red flag that means urgent care rather than a routine appointment.

  • Impingement not settling at 12 weeks

    Painful arc, night pain, positive Neer/Hawkins - after a proper physio and injection trial.

  • Type-III (hooked) acromion on MRI

    The morphology best answered by mechanical decompression - provided symptoms fit.

  • Symptomatic subacromial bursitis

    Chronic bursal thickening driving pain, with normal cuff, is a reasonable indication.

  • Partial-thickness cuff tear + impingement

    Under 50 percent thickness, symptomatic - decompression plus debridement is often enough.

  • Overhead athlete plateau

    Painters, swimmers, throwers - where mechanical impingement is the last piece stopping return to sport.

  • AC joint co-pathology

    A tender, cystic AC joint on MRI may need excision at the same sitting.

  • Not for full-thickness tears alone

    These need cuff repair, not decompression. We do not conflate the two.

  • Red flag: deltoid weakness or wasting

    New wasting or profound weakness needs neuro-shoulder workup and possibly EMG before any surgery.

Options

Approach and extent depend on the case.

What each option involves - and where each earns its place.

  • Standard arthroscopic ASD

    Bursectomy, acromioplasty, CA-ligament release. Three ports, 30–45 minutes, day-case.

  • ASD plus AC joint excision

    Where the AC joint is symptomatic - arthroscopic Mumford in the same sitting.

  • ASD plus cuff debridement

    For symptomatic partial-thickness cuff tears - debride, decompress, decide on repair only if delamination is >50 percent.

  • ASD plus biceps tenotomy or tenodesis

    Long-head biceps pathology is common - deal with it under the same anaesthetic.

  • ASD under regional block only

    Selected patients - awake, interscalene block, sedation. Faster recovery for the right candidate.

  • Not open acromioplasty

    Open technique is rarely used now; arthroscopic gives better visualisation and less deltoid disruption.

  • Not offered: routine primary ASD without a trial

    The CSAW trial data changed practice - we do not offer decompression as first-line without a documented non-operative course.

  • Not offered: ASD to fix a stiff shoulder

    Frozen shoulder needs hydrodilatation, capsular release or MUA - not decompression.

Our vetted UK network

A small, hand-picked panel of clinicians.

Consultants across London and the major UK cities. Introductions are private once we understand your case.

  • Consultant shoulder and upper-limb surgeons - arthroscopy-focused

  • Anaesthetists confident with interscalene regional blocks

  • On-site MRI shoulder within 48 hours

  • Physio pathway integrated with the surgeon from day 5

Safety and recovery

What to expect - honestly.

The things worth planning for, and the red flags that mean same-day care.

  • GA and regional block

    GA plus interscalene block is the standard. Rare block complications - hoarseness, phrenic paresis, transient hand weakness - are discussed in consent.

  • Bleeding, infection, DVT

    Arthroscopic infection under 0.5 percent, DVT under 1 percent. Portal-site bleeding is minor and self-limiting.

  • Stiffness

    The commonest complaint. Prevented by early physio from day 5. A minority need capsular release later.

  • Ongoing pain

    Roughly 20–30 percent do not achieve the pain relief they hoped for - the CSAW trial data must be part of consent.

  • Sham-surgery evidence

    ASD outperforms no treatment but was not superior to arthroscopy alone in CSAW. We share this before booking, not after.

  • Cuff progression

    Symptoms recurring after 6 months warrant a repeat MRI to rule out cuff-tear progression.

  • Return to driving and work

    Automatic car at 2 weeks, manual at 3–4, overhead work at 6–8.

  • Return to sport

    Non-contact 6–8 weeks, overhead sport 8–12 weeks, contact 12–16.

  • Red flags after surgery

    Fever, spreading redness, sudden weakness or profound numbness needs same-day team, not a routine call.

Reading your notes

Your report in four parts. Read the last one first.

Whatever the pathway, the summary keeps to the same shape.

  1. 01 Findings

    Bursal, cuff and AC joint status

    Bursal thickness, cuff surface integrity, AC joint appearance, biceps tendon, glenohumeral joint at first look.

  2. 02 Technique

    What was resected

    How much bone from the anterior acromion, whether CA ligament released, and any adjuncts (Mumford, biceps procedure, cuff debridement).

  3. 03 Adjuncts

    Concurrent procedures

    AC joint excision, biceps tenodesis or tenotomy, cuff debridement - each with its own recovery timeline.

  4. 04 Plan

    Physio and expected timeline

    Read this first: sling duration, physio start, work and driving milestones, and the follow-up plan.

Recognised by major UK insurers

BupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealix

Frequently asked

Everything we get asked about subacromial decompression.

  • How is this different from your shoulder decompression surgery page?

    The shoulder decompression surgery page is the wider decision - who is a candidate, how it compares with physio-only, the CSAW trial evidence, and the shared-decision conversation. This page is the narrower, arthroscopic-technique detail - the theatre steps, adjuncts, block and recovery timeline for the keyhole operation specifically.

  • Should I have this surgery at all?

    Only if 12 weeks of proper physio, at least one subacromial injection, and shared decision have all pointed to it. The CSAW and other trials showed arthroscopy alone is comparable to full decompression for many patients - so patient selection matters more than technique.

  • What is done in theatre, step by step?

    Interscalene block, then GA, position in beach-chair or lateral decubitus. Posterior arthroscopic port for diagnostic joint view, anterolateral working port, sometimes a lateral portal. Bursectomy, acromioplasty (anterior to lateral bone shaved), coraco-acromial ligament release, and inspection of the cuff. 30–60 minutes total.

  • Is it a day case?

    Yes, almost always. The interscalene block covers most of the first night; oral analgesia takes over as it wears off. Home the same evening with a sling and written physio.

  • How long is recovery?

    Sling for comfort 5–7 days, physio from day 5. Office work at 1–2 weeks, driving 2–3 weeks, overhead sport at 8–12 weeks. Full comfort at 3 months for most.

  • How much does private arthroscopic subacromial decompression cost in the UK?

    Roughly £4,800–£7,500 as a stand-alone day-case procedure. Combined with an AC joint excision £5,500–£8,500. Adding a cuff debridement or biceps procedure adds to the range. Insurance typically covers where non-operative treatment has been documented.

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