Your labs came back normal. You still feel off.

Not sure where to start? Eleven questions, about two minutes.
Take the 2 minute snapshot- Where
- Telehealth, California residents
- Who you see
- A licensed PA-C
- First visit
- 60 minutes
- How you pay
- Cash pay, no insurance billing
How it works
Root cause. Real numbers.
Four steps, the same for everyone, adjusted entirely to you.
01
A full hour to start
You begin with a comprehensive consultation. History, symptoms, training, sleep and goals, with the clinician who will treat you.
02
We look at the data
We evaluate labs, hormones and metabolic health, with testing chosen for your situation rather than a standard panel.
03
You get a plan
Your plan is personalized and overseen by a licensed provider, and the reasoning behind it is explained to you.
04
We adjust as you respond
We adjust and refine your protocol as your body responds, with scheduled follow up and retesting.
What we treat
Seven lines of care, one clinician
Testosterone therapy and weight loss are where most people start. Everything else is here too.

TRT
A full hormone and metabolic workup, personalized dosing, and structured follow up.

Weight loss
GLP1 support paired with muscle retention, body composition and the hormone picture underneath.

Hormone therapy (BHRT)
Symptom and lab based hormone evaluation, an individualized plan, scheduled review.

Gut and thyroid
The longer look at digestion and thyroid function, and a protocol built from it.

Sexual wellness and fertility
Hormone, libido and fertility care, with fertility preserving options discussed first.

Longevity and performance
Recovery, metabolic health and cognitive sharpness, measured and managed over time.

Hair, skin and beauty
Hair, skin and aging concerns evaluated for what is driving them internally.
Who we help
You will recognize yourself here
Normal labs, still not right
Fatigue, stubborn weight, bloating or brain fog, with a chart that says everything looks fine. This is the longer look that was never taken.
High performers and athletes
Recovery, body composition, stress resilience and hormone health, managed as numbers you track rather than a feeling you guess at.
Men's hormone and metabolic care
Energy, drive, strength and body composition, evaluated properly and then managed with real monitoring rather than a single number.
Women's hormone and wellness
Cycles, perimenopause, menopause, weight changes, fatigue and mood, taken seriously and worked up rather than waved off as normal.
How this compares
What you are actually choosing between
The other two columns describe the common pattern in each category, not any one company.
| Feature | Emerald Precision Health | Typical online telehealth | Traditional primary care |
|---|---|---|---|
| Length of your first visit | 60 minutes | Often 10 to 15 minutes, sometimes a questionnaire only | Commonly 15 to 20 minutes |
| Who you see at follow ups | The same clinician every time | Usually whoever is on shift that day | Your own clinician, when scheduling allows |
| Root cause workup | Part of every plan | Uncommon. Care is usually built around one medication | Depends on the visit and the time available |
| Advanced lab panels | Comprehensive panel available, 69 to 72 biomarkers, $499 | Usually limited to what the medication requires | Usually limited to what insurance will cover |
| Ongoing program fee | Monthly, quoted to you before anything is charged | Monthly subscription, usually tied to a medication | None. Visits are billed instead |
| Insurance billing | None. Cash pay | Usually cash pay | Yes |
| Prescriptions managed | Yes, when clinically appropriate | Yes, usually within a single category | Yes |
| Direct access to your clinician | Yes, through the patient portal | Usually a support team or a message queue | Usually through the office |
Emerald Precision Health
- Length of your first visit
- 60 minutes
- Who you see at follow ups
- The same clinician every time
- Root cause workup
- Part of every plan
- Advanced lab panels
- Comprehensive panel available, 69 to 72 biomarkers, $499
- Ongoing program fee
- Monthly, quoted to you before anything is charged
- Insurance billing
- None. Cash pay
- Prescriptions managed
- Yes, when clinically appropriate
- Direct access to your clinician
- Yes, through the patient portal
Typical online telehealth
- Length of your first visit
- Often 10 to 15 minutes, sometimes a questionnaire only
- Who you see at follow ups
- Usually whoever is on shift that day
- Root cause workup
- Uncommon. Care is usually built around one medication
- Advanced lab panels
- Usually limited to what the medication requires
- Ongoing program fee
- Monthly subscription, usually tied to a medication
- Insurance billing
- Usually cash pay
- Prescriptions managed
- Yes, usually within a single category
- Direct access to your clinician
- Usually a support team or a message queue
Traditional primary care
- Length of your first visit
- Commonly 15 to 20 minutes
- Who you see at follow ups
- Your own clinician, when scheduling allows
- Root cause workup
- Depends on the visit and the time available
- Advanced lab panels
- Usually limited to what insurance will cover
- Ongoing program fee
- None. Visits are billed instead
- Insurance billing
- Yes
- Prescriptions managed
- Yes
- Direct access to your clinician
- Usually through the office
Testing and pharmacy partners
Laboratory work, compounded medications and supplements are handled by established partners. Which one is used depends on what is being tested or prescribed for you.
- Quest DiagnosticsLaboratory
- LabcorpLaboratory
- Evexia DiagnosticsLaboratory
- DUTCHHormone testing
- Rupa HealthSpecialty testing
- Belmar Pharma SolutionsCompounding pharmacy
- FullscriptSupplement dispensary
Partner names are stated as a matter of fact about how care is delivered. No endorsement by these companies is implied, and their trademarks remain their own.

Meet your provider
Brittney Diffiné, PA-C
A physician assistant and former high level athlete, Brittney Diffiné practices hormone, metabolic and performance medicine for California residents. Her approach is to work with the body's physiology rather than override it, and to take the time to look at the full picture before deciding anything.
- Root cause
- Real numbers
- One clinician
- Root cause
- Real numbers
- One clinician
- Root cause
- Real numbers
- One clinician
- Root cause
- Real numbers
- One clinician
Questions
Before you book
Anything not answered here, get in touch.
Do you take insurance?
No. Emerald Precision Health is a cash pay practice and does not bill insurance. That is what makes a 60 minute first visit possible. The initial telehealth consult is $99 and the comprehensive lab panel is $499. Ongoing care is monthly and the number is quoted to you before anything is charged.
What states do you serve?
California only. The practice is licensed in California, so care is limited to California residents. If you move out of state, we will tell you what that means for your care.
What happens on the first call?
A full hour by video with the clinician who will treat you. It is mostly questions: your symptoms, your history, your training and sleep, what you have already tried and what you want. You leave with a plan for what to test and why, and a clear picture of what ongoing care would look like and cost.
What do labs cost?
The comprehensive panel is $499 and covers 69 to 72 biomarkers, with the consult included. Not everyone needs the full panel. Testing is chosen after your consult, so you pay for what is useful for your situation.
Do I need labs before booking?
No. Book the consult first. If you have recent results, bring them and we will use them. If you do not, testing is ordered after we have talked so the panel matches your situation rather than being run in advance and interpreted later.
How do medications get to me?
Prescriptions are sent to a pharmacy and shipped to you. Medication costs are separate from program fees and are paid directly to the pharmacy. Some medications are compounded, which means they are not FDA approved, and that is discussed with you before anything is prescribed.
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Work through the symptom checklist first. It is free, instant, and there is nothing to fill in to read it.