Government Employees Medical Scheme (GEMS)
Restricted scheme · CMS Reg. 1598 · Established 2006 · Largest restricted scheme in SA · ~2.3 million beneficiaries
Overview
The Government Employees Medical Scheme (GEMS) is a registered non-profit restricted medical scheme regulated by the Council for Medical Schemes under the Medical Schemes Act 131 of 1998. Established in 2006 following a government mandate to extend quality health cover to all public servants — especially low-income workers who had previously been uninsured — GEMS is now the second-largest medical scheme in South Africa overall and by far the largest restricted scheme in the country.
The Scheme was created from negotiations between government employer representatives and public-sector unions through the Public Service Coordinating Bargaining Council (PSCBC). Central to its founding design is an income-banded contribution structure: public servants pay contributions linked to their salary band, and the state as employer provides a concurrent subsidy covering a further portion of the cost. This model makes GEMS particularly accessible to junior public servants who would otherwise be unable to afford medical scheme membership.
Source: GEMS Annual Integrated Report; CMS Industry Report 2024; Moonstone — "CMS says GEMS cannot cut 25% reserve requirement".
Membership Profile
GEMS covers approximately 2.3 million beneficiaries across national and provincial government departments, making it the country's largest restricted medical scheme by a wide margin. The Scheme grew membership 2.41% in 2024, broadly in line with the overall restricted-scheme sector average.
The demographic profile of GEMS is materially different from open schemes. Restricted-scheme members average 31.8 years of age — significantly younger than open-scheme participants — reflecting the age structure of the public service. A lower pensioner ratio than open schemes contributes to a more favourable risk pool, which in turn supports the income-banded contribution model.
Source: GEMS Annual Integrated Report; DHMS 2024 Highlights of Results (industry restricted-scheme comparison).
Financial Health
GEMS holds reserves exceeding R23 billion, making it one of the best-capitalised medical schemes in South Africa. The Scheme comfortably meets the 25% statutory solvency requirement under Regulation 29(2) of the Medical Schemes Act — a requirement the CMS has confirmed applies equally to restricted schemes despite GEMS's unique income-banded structure.
GEMS's large investment portfolio generates material income that directly reduces the contributions members would otherwise pay. In a recent reporting year, above-expectation investment income of R1.7 billion allowed the Board to reduce the annual contribution increase by 1.5–2 percentage points relative to a pure claims-cost-driven rate. This investment discipline is a structural advantage of GEMS's scale.
As with all South African medical schemes, GEMS faces sustained medical-inflation pressures — hospital tariff escalation, specialist cost growth, and increased use of high-cost oncology therapies. The Scheme manages these through its scale-based tariff negotiating leverage and a well-established managed-care framework administered by Momentum Health Solutions.
Source: GEMS Annual Integrated Report; Moonstone — "CMS says GEMS cannot cut 25% reserve requirement"; DHMS 2024 Highlights of Results.
Plans & Options
GEMS offers 7 benefit options for 2026, structured to serve the full spectrum of public-service salary bands — from the most junior clerical worker to the most senior official. Contributions are income-banded: the same benefit option costs different amounts depending on the member's salary level. The state as employer also pays a concurrent subsidy toward each employee's contribution, materially reducing the net cost from the member's pocket.
Hospital-plan options (Tanzanite One and Beryl) primarily cover in-hospital events and defined day-to-day benefits within a Designated Service Provider (DSP) network. Mid-tier options (Ruby, Emerald Value) extend day-to-day and chronic benefits substantially. Comprehensive options (Emerald, Onyx) provide broad cover including above-threshold day-to-day, with Onyx representing the top tier designed around senior officials with complex medical needs.
| Plan | Category | Network model | Key feature |
|---|---|---|---|
| Tanzanite One | Entry-level hospital | DSP network | Income-banded; lowest subsidy tier |
| Beryl | Hospital + limited day-to-day | DSP network | Basic chronic cover; GP limit |
| Ruby | Network option | DSP + preferred network | Broader day-to-day; structured chronic |
| Emerald Value | Entry comprehensive | Hybrid | Extended chronic list; day-to-day sub-limits |
| Emerald | Comprehensive | Hybrid | Full chronic + specialist access; MSA element |
| Onyx | Top comprehensive | Hybrid / any provider | Maximum limits; designed around senior officials |
| Sapphire | Additional top-tier option | Any provider | High-end comprehensive; broad benefit suite |
Source: GEMS Annual Integrated Report; GEMS 2024 Scheme Rules; gems.gov.za plan overview pages.
Key Benefits & Differentiators
Income-banded contributions with state employer subsidy. This is GEMS's defining structural advantage. A junior public servant on a lower salary band pays a proportionally lower contribution for the same benefit option as a senior official — and the state employer simultaneously subsidises both. This makes meaningful medical cover accessible at income levels where full-rate open-scheme premiums would be unaffordable.
Scale-based negotiating leverage. With 2.3 million beneficiaries, GEMS commands some of the strongest tariff and managed-care negotiating positions in the country. This scale advantage translates into lower effective medical costs per event compared to smaller schemes operating independently.
Comprehensive chronic disease coverage on mid-tier and above. All plans cover the 27 Prescribed Minimum Benefit (PMB) Chronic Disease List (CDL) conditions at cost as legislated. Mid-tier plans (Ruby and above) add an extended list of chronic conditions beyond the CDL. Emerald and Onyx include formulary-managed access to a broad range of specialist-prescribed chronic therapies.
Member Wellness Programme. GEMS operates a member wellness programme covering preventive screenings, health risk assessments, chronic condition management programmes, and HIV/AIDS management — integrated into the benefit structure on all plans.
Oncology programme. GEMS operates a structured oncology benefit with dedicated managed-care protocols for in-hospital treatment, including chemotherapy, radiation therapy, and related procedures. Benefit limits apply per plan option; Emerald and Onyx have the most comprehensive oncology provisions.
Mental health cover. All plans include PMB-level mental health hospitalisation cover. Higher-tier plans (Emerald, Onyx) extend to outpatient psychiatry and psychology consultations within defined annual limits.
Source: GEMS plan guide 2024; GEMS Annual Report; gems.gov.za benefits pages.
Wellness & Loyalty
GEMS operates the Member Wellness Programme across all benefit options. The programme covers annual health screenings (blood pressure, cholesterol, glucose, BMI), HIV counselling and testing, and chronic condition management coaching for members living with hypertension, diabetes, asthma, and other high-prevalence conditions.
On mid-tier plans (Ruby and above), members can access structured disease management programmes that provide pharmacist-led medication counselling and regular monitoring. These programmes are integrated into the overall managed-care framework administered by Momentum Health Solutions.
GEMS does not operate a standalone consumer wellness rewards programme (such as Vitality). The focus is on preventive and disease management benefits embedded within the scheme's clinical protocols rather than gamified behaviour change.
Claims & Service
Claims are processed through Momentum Health Solutions' administration infrastructure. Providers who render services to GEMS members submit claims directly via electronic data interchange (EDI). Members can also submit manual claims via the GEMS member portal, mobile app, or walk-in service centres located in major centres around the country.
Dispute resolution follows the standard Medical Schemes Act process: internal appeal to the GEMS Dispute Resolution Committee, escalating to the CMS Principal Officer and then the CMS adjudication process if unresolved. GEMS's scale means that common dispute types (oncology pre-authorisation, CDL chronic registration, out-of-network claims) are handled under well-established internal protocols.
Source: GEMS Annual Integrated Report; gems.gov.za member services pages.
How the Scheme Is Set Up
GEMS is structurally available only to employees of the South African public service and their qualifying dependants. Within that eligible population, the Scheme serves every income segment:
Junior and lower-income public servants (Tanzanite One / Beryl): The income-banded structure and state subsidy make these options genuinely affordable for workers who would face prohibitive premiums on any open scheme. Hospital cover with DSP network access and basic chronic benefits at a subsidised net cost is a strong value proposition for this group.
Mid-career public servants with families (Ruby / Emerald Value / Emerald): The mid-tier plans balance premium cost and benefit breadth well. Emerald in particular provides a comprehensive family cover option — chronic disease management, specialist access, and a medical savings element — at competitive total cost once the employer subsidy is factored in.
Senior officials and professionals (Onyx / Sapphire): Top-tier options provide near-open-market-equivalent benefit breadth, including broad specialist access, comprehensive oncology, and high annual limits — at premiums that, with the employer subsidy, compare favourably to equivalent open-scheme options.
Source: GEMS plan guide 2024; GEMS Scheme Rules 2024.
Eligibility & Continuation
Who can join: Employees of national and provincial government departments, certain Schedule 3A and 3B public entities, and other entities as defined in the GEMS Scheme Rules and PSCBC resolutions. Eligibility is determined by the employer's participation in the GEMS employer agreement. Municipal employees are generally not eligible for GEMS (they may qualify for SAMWUMED or the LGBC municipal scheme).
Income-banded contributions: Members select a benefit option, and their contribution amount is then determined by their salary band. As salary increases, the contribution for the same option increases — and the state employer's subsidy also adjusts accordingly. The net (member-paid) contribution for lower salary bands can be substantially lower than the headline contribution rate.
State employer subsidy: For most qualifying public servants, the employer (the relevant government department) pays a concurrent subsidy toward GEMS contributions. The amount is determined by PSCBC resolution and is updated periodically. Members should confirm the applicable subsidy with their Human Resources department.
Continuation members: Public servants who retire from government employment (on pension, medical retirement, or after qualifying service) are typically eligible to remain on GEMS as continuation members. The income-banded structure adjusts for pensioner income levels. Non-retiring leavers who resign or are dismissed do not retain GEMS membership and must transfer to an open medical scheme within the Medical Schemes Act's portability period.
Dependants: Eligible dependants (spouse/life partner and dependent children up to the age of 26, or older if studying or disabled) may be registered under the principal member's GEMS membership. On the death of the principal member, continuation rules govern surviving-spouse and child cover.
Source: GEMS Scheme Rules 2024; PSCBC Resolution 8 of 2000 (as amended); gems.gov.za eligibility pages.