9.4 days
Average UK sickness absence per employee — the highest in over 15 years
In-House Health by Deia · On-site & virtual GP clinics
A human health programme that
transforms how your people perform
Private, GP-led preventive medicine, embedded where your people already are.
On-site and virtual clinics, executive health assessments and expert-led workshops — led personally by Dr Lafina Diamandis, GP & Lifestyle Medicine Physician, for employers, members' clubs, hospitality and premium gyms.
3 ways to book
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What your people actually want
You already know the value of health at work.
Here is the version your people will use.
What makes a health benefit land is remarkably simple: a real doctor your people can sit down with — in the building, on a day that suits them, with time to be heard and a plan they leave holding. That is what we bring in, and it is why it gets used.
3–5%
Typical take-up of an employee assistance programme, in employers' own reporting
34%
Of UK workers never use the health benefits they already have
Sources: CIPD Health & Wellbeing at Work 2025, Simplyhealth 2025, HCML employer reporting.
Why this is different
Not another wellness app.
A human relationship your people trust and use.
Digital health tools have their place. What they cannot do is sit opposite someone for forty minutes while they explain the exhaustion, the gut symptoms, the perimenopause, the blood pressure reading nobody followed up — and then take responsibility for what happens next.
In-House Health by Deia brings that presence into your organisation. Clinics held on a regular rhythm, with a named doctor who remembers last time. People feel seen, they come back, and the benefit becomes part of how the place runs.
A login nobody remembers
A named GP your people meet in person, in your building
Triage that hands you back to a waiting list
Assessment, bloods, prescriptions and referral arranged in one sitting
A single wellness talk that changes nothing
Weekly presence, so care becomes part of how the place runs
Dashboards measuring engagement with content
Clinical judgement applied to the risks that actually cause absence
Three audiences, one engine
Private, GP-led preventive medicine
brought inside your organisation
Law · Private equity · Consulting · Media · Professional services
The medical function you need in-house
A private, GP-led clinic embedded in your workplace — weekly on-site sessions backed by virtual access, so your people get personal, confidential assessment without leaving the building.
01
On-site & virtual GP clinic
Regular in-person sessions at your offices, with virtual consultations between them. Concerns get dealt with while they are still small, which is where absence is actually prevented.
02
Executive health assessments
Cardiovascular and metabolic risk profiling, biomarker-driven screening and a personalised strategy with follow-up — senior-appropriate care for the people your firm cannot afford to lose.
03
Performance & wellbeing workshops
Sessions on stress and burnout, cognitive performance, cardiometabolic health, women's health, sleep and energy — each with a blood panel and follow-up one-to-ones, so the room leaves with data, not slides.
04
Confidential by design
Individual health information is never reported back to the employer. That is precisely why senior people engage with it.
Not for organisations looking for the cheapest tick-box option.
In-House Health by Deia
Scoped, installed, sustained
A three-stage method for building a medical function inside an organisation that was never designed to have one.
01
Scope
We map your organisation's needs, culture, goals and existing insurer coverage, then design around them — on-site clinics, executive screening, workshops, or a combination. Nothing is a template, because utilisation is decided by fit.
02
Install
We arrive fully equipped, staffed and CQC-compliant. A clinic can be live within 72 hours: you provide a room, we bring everything else — booking system, equipment and clinical team.
03
Sustain
Ongoing, relationship-based care with a long-term view. The same doctor, returning on a rhythm, is what stops a strong start from quietly fizzling out.
72 hrs
From set-up to a live, fully staffed, CQC-compliant clinic on your premises. You provide a room. We bring the rest.
The methodology
Conventional medicine, applied to the
six things actually driving performance
Diagnostics, examination and prescribing where they are needed — combined with the six levers that determine how a person functions between appointments. Together they explain why prevention delivered inside an organisation outperforms treatment arranged outside it.
Nutrition
Blood sugar swings, iron and B12 deficiency and poor fuelling are the commonest reasons capable people describe themselves as foggy by 3pm. Corrected, cognitive stamina returns within weeks.
Movement
Cardiorespiratory fitness is the single strongest predictor of long-term health. It also determines who copes with a punishing quarter and who breaks under it.
Sleep
Chronic short sleep degrades decision-making, emotional regulation and immunity before anyone reports feeling unwell. It is the most under-treated cause of presenteeism.
Stress
Sustained pressure shows up physically — blood pressure, gut symptoms, cycle disruption, palpitations. Treating it as a medical matter rather than a mindset one is what changes the trajectory.
Social connection
Isolation is a measurable cardiovascular and mental-health risk. In hybrid organisations it is also the most easily overlooked one.
Toxin reduction
Alcohol, nicotine and habitual reliance on stimulants are usually the untouched variable behind poor sleep, anxiety and rising blood pressure in high performers.
Genetics and family history sit underneath all six, determining where we look first and how hard we look.
Led personally
Dr Lafina Diamandis
GP & Lifestyle Medicine Physician · Founder & Medical Director
BScMScMBBSMRCGPDip BSLM/IBLM
A GMC-registered GP and dual-certified Lifestyle Medicine Physician with 19 years in practice, Dr Diamandis has run on-site clinics for organisations employing thousands at their London headquarters, and delivered thousands of corporate health assessments for global banks, technology companies and professional-services firms.
She knows what makes a workplace clinic work, because she has stood in the room. People do not open up to a portal about the symptom they have been ignoring for a year. They open up to a doctor who has time, who they have met before, and who they trust to keep it confidential.
Every engagement is led personally by Dr Diamandis, with trusted GP associates brought in to scale delivery as the programme grows.
“Dr Diamandis has a very calming manner and immediately makes her patients feel at ease. She takes a broad view of her patients' medical problems and assesses them at all angles, including non-prescription based. We share a number of patients and they all speak very highly of her. I have no hesitation in recommending her.”
“Lafina is not only an experienced and excellent doctor, she practices whole person medicine — prevention and cure in a truly holistic way. And a warm, empathic clinician to boot.”
The way in
Start with twelve weeks,
then decide with real data
You should not have to take a multi-year view on trust. A time-boxed pilot lets you see genuine utilisation inside your own organisation before anyone signs a longer agreement — and gives you the numbers to put in front of finance.
- A fully equipped, staffed, CQC-compliant clinic on your premises
- On-site sessions across a twelve-week window, with virtual access alongside
- Utilisation and engagement data to inform the decision about a full rollout
- A scoped proposal at the end, based on what your people actually used
Before you ask
The questions that decide this
We already have a virtual GP through our insurance. Why would we need this?+
Because access is not the problem — use is. Bundled digital GP services are the least-known benefit in most organisations, and they are rarely used for the slow-burn issues that cause absence. This is a doctor physically present in your building on a regular rhythm, seeing people face to face, examining them, taking bloods and following things through.
Does our organisation see individual employees' health information?+
Never. Every consultation is confidential between the individual and the doctor. Organisations receive utilisation and engagement information only. That boundary is exactly why senior people are willing to use the service.
Is delivery regulated?+
Yes. Delivery is CQC-compliant, led by a GMC-registered GP, with our own booking system, equipment and clinical team. We do not replace anyone's NHS GP; we work alongside it.
How much work is this for our team?+
You provide a room. We bring equipment, staffing, booking and clinical governance. A clinic can be live within 72 hours of set-up.
How do we know it won't start strongly and then fizzle?+
Because it is built on a relationship rather than a launch. The same doctor returns on a regular rhythm, and engagement is reviewed with you throughout. That continuity is what one-off wellness days and app rollouts structurally cannot offer.
What do you not do?+
No one-off wellness-day gimmicks. No anonymous app-only care in place of a real clinician. No guaranteed clinical outcomes, and no absence or productivity figures we cannot personally stand behind.
Regulated, registered, verified
Clinical care is delivered by GMC-registered doctors under full CQC-compliant governance. Screening identifies and profiles risk; it does not guarantee detection of all disease. No clinical outcomes are guaranteed.
Next step
Tell us about your people.
We will design around them.
A short scoping conversation covering your size, culture, existing coverage and priorities. You will leave it with a clear view of what a programme here would look like — whether or not you go ahead.
3 ways to book
Start the conversation
Tell us what you need,
and we will take it from there
Send a short enquiry and the clinic team will reply the same working day with availability and the right appointment length for you.
- hello@deiahealth.com
- Clinic
- 9 Harley Street, London — also by video
- Response time
- Same working day