No single diagnosis automatically qualifies you for ill health retirement. The medical conditions that qualify for ill health retirement are the ones that permanently stop you from doing your job, and in many schemes stop you from doing any suitable work, backed by medical evidence strong enough to convince an independent reviewer. Advanced musculoskeletal disease, cancer, cardiovascular illness, neurological disorders, severe mental health conditions, and terminal illness all commonly qualify — but only when their functional impact is serious enough. Someone with well-managed diabetes will usually be turned down. Someone with a rarer condition that destroys their ability to sit, concentrate, or lift can be approved. The question is always what you can still do.
Conditions That Most Often Qualify
In the United States, the Social Security Administration’s Blue Book groups qualifying impairments into 14 categories covering the major body systems: musculoskeletal, respiratory, cardiovascular, neurological, cancer, mental disorders, immune system, digestive, endocrine, skin, blood, genitourinary, special senses and speech, and congenital disorders affecting multiple systems.1Social Security Administration. Listing of Impairments – Adult Listings (Part A) UK pension schemes don’t use category lists in the same way, but the medical territory is the same.
In practice, most successful ill health retirement claims fall into a handful of groups:
- Severe musculoskeletal conditions — advanced arthritis, degenerative disc disease, spinal injuries, and joint disorders that limit sitting, standing, walking, or lifting for sustained periods.
- Cancer, particularly advanced-stage or treatment-resistant disease, where either the illness or ongoing treatment prevents sustained work.
- Cardiovascular disease, including heart failure and coronary artery disease, especially where chronic fatigue or risk of sudden incapacity is involved.
- Neurological disorders such as multiple sclerosis, Parkinson’s disease, epilepsy, stroke-related impairments, and traumatic brain injury.
- Serious mental health conditions, including major depressive disorder, bipolar disorder, schizophrenia, PTSD, and severe anxiety disorders. The SSA assesses these against functional criteria covering understanding information, interacting with others, concentrating, and managing oneself.2Social Security Administration. 12.00 Mental Disorders – Adult
- Terminal illness, generally meaning a life expectancy under 12 months, which often triggers expedited processing and enhanced benefits.
Having one of these conditions is not the same as qualifying. Two claimants with identical diagnoses can get opposite decisions if their functional limitations differ.
Why the Diagnosis Alone Doesn’t Decide It
Every ill health retirement scheme evaluates functional capacity rather than the label on your medical file. One person with degenerative disc disease returns to full duties after treatment. Another cannot sit at a desk for 20 minutes without debilitating pain. The second has a case; the first does not.
Three tests run through nearly every scheme. Permanence: the condition is expected to last until normal retirement age, or at minimum 12 months in some US programs. Severity: it prevents you from efficiently performing your job duties. Treatment resistance: reasonable medical treatment has been tried and hasn’t restored your ability to work.
Most schemes also ask whether your employer could make reasonable adjustments — modified duties, different equipment, a changed environment — that would let you keep working. If those adjustments are feasible and would solve the problem, the case for ill health retirement weakens sharply. This is a large part of why medical reports that only describe the diagnosis fall flat. What decision-makers need to see is what you cannot do, in concrete terms, even after adjustments and treatment.
How the Test Changes by Scheme
The same medical condition can qualify under one scheme and fail under another, because the definition of “unable to work” is written differently in each. Knowing which scheme you fall under is as important as knowing your diagnosis.
UK Local Government Pension Scheme
The LGPS uses a three-tier structure and requires at least two years of qualifying membership.3Local Government Pension Scheme. Ill Health Retirement Tier 1 applies when you are unlikely to be capable of gainful employment (paid work of at least 30 hours a week for at least a year) before normal pension age; you receive your full accrued pension with no early-payment reduction, plus the pension you would have built up to normal pension age. Tier 2 applies when you are unlikely to be capable of gainful employment within three years but likely to recover before normal pension age; you get your accrued pension with no reduction plus 25% of the pension you would have built up. Tier 3 applies when you are likely to be capable of gainful employment within three years; you receive your accrued pension without reduction, paid temporarily, stopping after three years or when you become capable of gainful employment.4Local Government Pension Scheme. Ill Health Tiers
The tier difference is enormous. A Tier 1 award for someone 15 years from normal retirement can nearly double their pension compared with Tier 3. Tier placement is one of the most contested points in LGPS medical assessments.
NHS Pension Scheme
The NHS scheme uses two tiers and also requires two years of membership. Tier 1 applies when you are permanently incapable of efficiently performing your NHS duties due to physical or mental ill health; your pension is paid on your accrued contributions with no early-payment reduction.5NHS Business Services Authority. What Is a Tier 1 and Tier 2 Ill Health Pension Tier 2 requires that you also be permanently incapable of regular employment in the broader labor market. Under the 2015 NHS Scheme, Tier 2 adds an enhancement based on half of your prospective membership to normal pension age; under the older 1995 and 2008 sections, the enhancement is based on two-thirds.6NHS Business Services Authority. NHS Pensions – Ill Health Retirement Tiers and FAQs
The Tier 1 versus Tier 2 line matters especially for clinical staff whose specific job is unusually demanding. A nurse who can’t lift patients might meet Tier 1 easily, yet be judged still capable of some other regular employment, keeping them out of Tier 2.
US Social Security Disability Insurance
For most US workers, SSDI is the closest equivalent to ill health retirement, and the bar is high. You must be unable to engage in substantial gainful activity because of a medical condition expected to last at least 12 months or result in death.7Social Security Administration. Code of Federal Regulations 404.1520 The SSA works through a five-step evaluation, and a claim can end at any step:
- Are you working? Earnings above the substantial gainful activity threshold ($1,690 per month in 2026 for most applicants, $2,830 if blind) end the claim here.8Social Security Administration. Substantial Gainful Activity
- Is your condition severe enough to significantly limit basic work activities such as standing, walking, concentrating, or communicating?
- Does it meet a Blue Book listing? A match in severity and duration means approval without further analysis.
- Can you do your past work? The SSA assesses your residual functional capacity against jobs you’ve held in the past 15 years.
- Can you do any other work, given your age, education, skills, and remaining capacity? If suitable jobs don’t exist in significant numbers, you qualify.7Social Security Administration. Code of Federal Regulations 404.1520
Most claims are decided at steps 4 and 5, where the question stops being “how bad is your condition” and becomes “what can you still do.” Vocational experts often testify at this stage on whether jobs matching your limitations exist in the national economy, and their testimony can be challenged through cross-examination at hearing.9Social Security Administration. Vocational Experts – General
To be insured for SSDI, you generally need 40 work credits, with 20 earned in the 10 years immediately before your disability began. Younger workers can qualify with fewer credits.10Social Security Administration. How Does Someone Become Eligible
US Federal Employee Disability Retirement (FERS)
Federal employees have a separate path with its own requirements. You need at least 18 months of creditable federal civilian service, and your condition must prevent useful and efficient service in your current position, meaning fully successful performance of essential job duties.11eCFR. 5 CFR Part 844 – Federal Employees Retirement System – Disability Retirement
Several FERS requirements trip people up. Your agency must certify that it cannot accommodate your condition and has considered you for reassignment to any vacant position at the same grade within your commuting area. You must file before separating from service or within one year afterward, a deadline waivable only for mental incompetence. And you must also apply for SSDI: withdrawing that SSDI application automatically dismisses your FERS disability claim.11eCFR. 5 CFR Part 844 – Federal Employees Retirement System – Disability Retirement
Private Disability Insurance Policies
If your ill health retirement runs through a private disability policy — employer-provided or individually bought — the policy’s own definition of disability controls the outcome, and two definitions dominate.
An own-occupation policy pays if you cannot perform the duties of your specific occupation. A surgeon who develops hand tremors qualifies even if they could still teach medical students. An any-occupation policy only pays if you cannot work in any job suited to your education, experience, and training. That same surgeon might be denied because they could plausibly work as a medical consultant.
Watch for policies that switch definitions partway through. A common structure gives own-occupation coverage for the first two years, then converts to any-occupation. Claimants approved easily at the start sometimes face a reassessment at the two-year mark under the stricter standard.
The Medical Evidence That Actually Wins Claims
Whichever scheme you’re applying under, the strength of your medical evidence usually decides the outcome. Administrators and agencies want documentation that independently confirms both the existence and the severity of your condition.
At minimum, you need detailed reports from your treating physicians covering diagnosis, treatment history, and prognosis. The reports should describe in concrete terms how your condition limits specific work activities. “Patient has back pain” is close to useless; “patient cannot sit for more than 15 minutes or lift more than five pounds” is the kind of statement decision-makers rely on. Diagnostic imaging, blood work, and specialist assessments give the objective foundation. Records of ongoing treatment that hasn’t resolved the condition help establish permanence.
Mental health claims have specific evidentiary needs. The SSA expects psychiatric history, mental status examinations, psychological testing, medication records including side effects, and observations of how you function during clinical encounters.2Social Security Administration. 12.00 Mental Disorders – Adult Mental health claims fail more often than they should because claimants have gaps in treatment records, and gaps give decision-makers an opening to argue the condition isn’t as severe as claimed.
A functional capacity evaluation is worth knowing about. It’s a structured, multi-hour assessment by a physical or occupational therapist that objectively measures what you can do: lifting capacity, sitting and standing tolerance, walking endurance, hand dexterity, cardiovascular stamina. Because the results come from standardized testing rather than self-report, they carry significant weight with insurers and administrative judges. If your claim is likely to be contested, and most are, an FCE is one of the strongest pieces of evidence you can bring.
How the Decision Is Made
Once you file, an independent medical professional reviews your case. In UK pension schemes it’s a Scheme Medical Adviser appointed by the pension administrator. In SSDI cases, a state Disability Determination Services office issues the initial decision, and an Administrative Law Judge handles any hearing-level appeal.
The reviewer may ask for additional reports, updated tests, or a fresh examination if the evidence has gaps. In UK schemes, whether the employer can make reasonable workplace adjustments forms part of the assessment.12Department for Communities and Local Government. Local Government Pension Scheme Guidance on the Application of the Ill Health Regulations For FERS claims, the agency must specifically certify it has considered reassignment before the application moves forward.11eCFR. 5 CFR Part 844 – Federal Employees Retirement System – Disability Retirement In the Civil Service Pension Scheme, the Scheme Medical Adviser reviews all evidence and may recommend a provisional award at the rate most appropriate if the correct tier cannot immediately be determined.13Civil Service Pension Scheme. Medical Review and Appeals The decision comes to you in writing with an explanation of the benefit calculation.
If You’re Denied
Initial denial rates are high. The majority of first-time SSDI applications are denied, and UK scheme applications are often knocked back at the medical assessment stage. A denial is not the end. Every system has an appeals route, and many claims that fail initially succeed on appeal once further evidence is submitted.
UK public sector schemes use the Internal Dispute Resolution Procedure, which has two stages: a written appeal to the scheme administrator, then escalation to a more senior decision-maker if the first stage doesn’t resolve it. If both stages fail, the case can go to the Pensions Ombudsman, whose decisions are legally binding. In the Civil Service scheme, the appeal uses the same medical criteria as the original decision, and a physician reviews both the original evidence and any new reports.13Civil Service Pension Scheme. Medical Review and Appeals
SSDI has four levels of appeal: reconsideration by someone not involved in the initial decision; a hearing before an Administrative Law Judge; Appeals Council review for legal errors; and finally a civil action in federal district court.14Social Security Administration. Appeal a Decision We Made The ALJ hearing is where most successful appeals are won. You testify, present evidence, and can cross-examine any vocational expert. New medical evidence submitted at this stage often changes the outcome.
The pattern across every scheme is the same. Diagnosis gets you in the door. Functional evidence, specific to the work you can no longer do, is what gets a claim approved.