Diagnostics and Functional Lab Testing
Connecting Symptoms to Root Causes Through Precision Testing
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If you’re doing “all the right things” but your energy, sleep, or digestion still won’t settle, it’s hard to know where to focus.
At Lam Clinic, diagnostics and functional lab testing help clarify what’s going on and what may be driving it.
We combine focused medical diagnostics with deeper functional labs to look at patterns across hormones, gut health, inflammation, nutrients, and metabolism.
You get a clear explanation of results and a practical plan built around what your body can handle, aimed at steady progress and long-term health.
Is Diagnostics and Functional Lab Testing Right for You?
You may benefit if you are experiencing:
- Ongoing fatigue, brain fog, or low energy despite “normal” labs
- Poor sleep, afternoon crashes, or feeling tired but wired
- Bloating, reflux, constipation, loose stools, or food reactions
- Irregular periods, PMS, perimenopause changes, or low libido
- Blood sugar swings, stubborn cholesterol changes, or rising blood pressure
- Dizziness on standing, palpitations, tingling, or balance changes
- Frequent infections, allergies, rashes, or sensitivity to mold or chemicals
- Lingering symptoms after a viral illness
You may be a good fit if you are looking for:
- Clarity about what may be driving your symptoms
- A deeper look beyond basic screening labs
- Testing chosen for a clear reason, not all at once
- Help connecting hormones, gut health, stress, and metabolism
- A plan that feels structured and manageable
- Ongoing guidance rather than one-time results
- A prevention-focused, data-informed approach to long-term health
What to Expect When You Work With Us
We keep testing organized and purposeful, so you understand what we are doing, why it matters, and what happens next. Many patients come to us after years of scattered labs and conflicting advice.
Our job is to bring the pieces together, choose the right tests for the right reason, and turn results into steps you can actually follow.
- First visit: A comprehensive review of your symptoms, health history, medications and supplements, and prior labs
- Testing (when needed): Targeted, question-based testing chosen only when results will guide a decision
- Your plan: Practical lifestyle priorities for nutrition, sleep, stress, and movement, with selective therapies added for safety and fit
- Follow-up: We track trends over time, adjust your plan as your body responds, and retest only when it will change your next steps
How Diagnostics and Functional Lab Testing Works at Lam Clinic by Using the LAM Method™
At Lam Clinic, testing is guided by the LAM Method™. It is a structured process that keeps care organized, purposeful, and paced to your needs. This method follows three healing phases: Learn the Why, Address the Root, and Maximize Longevity. Here is how we apply the LAM Method™ to testing:
Phase 1 of LAM Method™
Learn the Why
We start with your full history, current symptoms, lifestyle patterns, medications and supplements, and prior results.
We look for patterns across hormones, gut health, inflammation, nutrients, metabolism, and stress load.
From there, we recommend functional labs that will reveal the root causes of your condition.
Types of Testing We Use at Lam Clinic
Elite Workup: In-Clinic Diagnostics
For patients who need a closer look at how key organs and systems are functioning, we may recommend an Elite Workup. This is in-clinic testing that goes beyond standard bloodwork and gives us a clearer picture of structure, function, and physiology in real time.
Heart and vascular
- EKG
- Echocardiogram
- Ankle Brachial Index
- Carotid Ultrasound
- Aorta Ultrasound
These tools help us assess structure, blood flow, and circulation in the context of chest discomfort, shortness of breath, leg symptoms, or cardiovascular risk.
Autonomic and nervous system
- Heart Rate Variability Analysis
- Nervous System Testing (HRV/ANS)
- Sudomotor Neuropathy Testing
- Neuro Brainwave Testing (qEEG)
- Balance Testing
These tests can help clarify dizziness, POTS-like patterns, neuropathy, brain fog, and stress-related nervous system changes.
Lungs
- Pulmonary Function Testing
Used to evaluate breathing capacity and airflow when there is shortness of breath, an asthma or COPD concern, or exercise intolerance.
Body composition and metabolism
- Bioelectrical Impedance Analysis
Provides information on body fat, muscle mass, and fluid status to better guide nutrition, movement, and metabolic support.
Allergy and immune
- Allergy Skin Testing
Helps identify which foods and environmental factors you are reactive to so we can better support your immune system and help you make more informed choices.
Circulation and microvascular
- Photoplethysmography Analysis
Assesses small-vessel and microvascular function, which may be relevant in diabetes, cold extremities, or certain neurologic and circulatory issues.
Detox and liver
- Liver Scan
Screens for fatty liver or other structural concerns that may affect metabolism, hormones, and energy.
Functional Lab Testing: 100+ Biomarkers and Beyond
We often begin with a thorough blood panel. This helps establish a strong baseline and can uncover patterns that are easy to miss when only a few markers are checked at a time.
- Thyroid and conversion: TSH, Free T4, Free T3, plus Reverse T3 and antibodies when indicated. This helps us understand thyroid output, conversion efficiency, and possible autoimmune thyroid activity.
- Metabolism and glycemic control: Fasting glucose, insulin, hemoglobin A1c. Used to evaluate insulin resistance, prediabetes risk, and blood sugar patterns that influence energy and weight.
- Lipids and particle quality: Total cholesterol, LDL, HDL, triglycerides, and advanced lipoprotein metrics. These results provide a deeper view of cardiovascular risk than a standard lipid panel alone.
- Inflammation and immune activity: hs-CRP, ESR, selected immune markers, and autoantibodies. Helps identify ongoing or low-grade inflammation and immune imbalance that standard panels often miss.
- Nutrients and minerals: Iron and ferritin, TIBC, B12, folate, vitamin D, magnesium, zinc, selenium, and iodine. These markers are tied to energy, mood, thyroid function, immunity, and tissue repair.
- Liver and detox function: CMP including AST, ALT, ALP, and bilirubin, plus GGT and uric acid. Assists in evaluating how well your liver is processing and clearing substances from the body.
- Kidney and electrolytes: eGFR, BUN and creatinine, sodium, potassium, chloride, and CO2. Confirms kidney function and fluid and electrolyte balance before making more advanced treatment decisions.
- Hormones: Estradiol, progesterone, total and free testosterone, DHEA-S, and cortisol pattern through saliva or urine when appropriate. Offers insight into sex hormone balance and stress hormone rhythm, which affect mood, sleep, weight, and overall resilience.
- Hematology: CBC with differential and RBC indices. Evaluates for anemia patterns, infection signals, and other blood-related concerns.
- Cardiovascular risk markers: Lipids plus lipoprotein(a) and homocysteine. Helps refine your personal risk profile for heart disease and stroke beyond what a standard panel reveals.
- Oxidative and metabolic stress: Selected markers appropriate to your case. Used to gauge metabolic strain and recovery capacity.
Additional Functional Labs When Helpful for Your Case
For more complex or long-standing issues, we may suggest focused specialty tests. These are added selectively based on your history and what the initial results suggest.
- Gut Microbiome Stool Test: Reviews pathogens, dysbiosis, inflammation, enzyme function, and beneficial bacteria.
- 3×4 Genetic Test (Actionable Genomics): Looks at genetic patterns in methylation, detox, inflammation, metabolism, and recovery.
- Micronutrient Testing: Evaluates vitamins, minerals, and amino acids related to energy, immunity, hair and skin, and nerve health.
- Organic Acid Test (OAT): Reviews metabolic byproducts related to nutrient status, mitochondrial function, detox load, and yeast and bacterial imbalance.
- Heavy Metal Testing: Measures metals such as mercury, lead, arsenic, and cadmium that can affect nerves, kidneys, hormones, and mitochondria.
- Mold and Mycotoxin Testing: Assesses exposure to mold-related toxins that may relate to fatigue, brain fog, sinus or respiratory symptoms, and sensitivities.
- Neurotransmitter Testing: Looks at metabolites related to neurotransmitters that influence mood, focus, sleep, and stress responses.
- Comprehensive Hormone Breakdown Test: Reviews sex hormones and their metabolites alongside cortisol patterns.
- Environmental Toxins Testing: Screens for common chemical exposures such as phthalates, BPA, solvents, and pesticides.
Phase 2 of LAM Method™
Address the Root
Once results are in, we review them with you in plain language. We focus on what matters most, what can wait, and how findings connect to how you feel day to day.
We stabilize the systems most under strain using:
- Lifestyle targets that match your current capacity, including sleep, stress, nutrition, and movement
- Nutritional strategies based on your patterns, tolerance, and needs, including supplements vetted for quality and clinical fit when they are part of your plan. Browse what Dr. Lam recommends at Dr. Lam’s Online Store
- Therapies when appropriate, selected for safety, fit, and clear purpose
Phase 3 of LAM Method™
Maximize Longevity
As you improve, we shift from gathering data to maintaining stability. We track trends over time, adjust your plan as your life and physiology change, and retest only when it will guide a meaningful decision.
Why Patients Choose Lam Clinic for Diagnostics and Functional Lab Testing
Diagnostics and functional lab testing at Lam Clinic is physician-led, with more than 25 years of experience guiding how we evaluate complex, overlapping symptoms.
We combine conventional medical diagnostics with functional lab testing so results stay clinically grounded and connected to real decisions.
Before adding anything new, we review your medications, supplements, prior labs, and past workups to avoid duplication and keep care coordinated.
Patients also value that we stay involved after results come in. Follow-up is structured, changes are paced, and retesting is used only when it will guide next steps.
We do not replace your primary care provider, and we encourage an active partnership for routine screening and urgent needs.
Frequently Asked Questions
What is the difference between diagnostics and functional lab testing?
Diagnostics evaluate how specific organs and systems are functioning right now, such as heart rhythm, lung capacity, or circulation. Functional lab testing looks at patterns across hormones, nutrients, metabolism, and inflammation to help explain why symptoms may be persisting.
How do you decide which tests I need?
We start with your history, symptoms, and prior results. Tests are recommended only when they answer a clear clinical question and would change your plan. Nothing is ordered automatically or as part of a preset bundle.
What types of tests do you commonly use?
We may use in-clinic diagnostics such as EKG, autonomic testing, body composition analysis, vascular imaging, or pulmonary testing, along with comprehensive blood panels. When appropriate, specialty labs like stool testing, micronutrients, hormone panels, or toxin screens are added selectively.
Is testing safe?
Most tests involve standard blood draws, noninvasive imaging, or at-home kits. Side effects are usually limited to brief discomfort from blood work or mild skin irritation from allergy testing. We review your history to minimize risk.
How much does testing cost, and is it covered by insurance?
Costs depend on the scope of testing. Standard labs are often billable through insurance, while some specialty tests are cash-based. We review expected fees in advance and help you prioritize based on clinical need and budget.
Do you offer virtual visits and where are you located?
Yes. We offer secure telehealth visits for patients worldwide, along with in-person care at our clinic in Tustin, California. Many patients visit us from across Orange County, including Irvine, Santa Ana, Orange, Costa Mesa, and Anaheim.
Do you accept insurance?
We accept most PPO insurance plans. Coverage varies by plan. We do not accept Medicare, Medicaid/Medi-Cal, or HMOs. When something isn’t covered, we’ll explain costs upfront and help you prioritize what matters most.
Still Feeling Unwell Even Though Your Labs Keep Coming Back “Normal”?
Share your symptoms and goals with us, and we’ll help you see whether diagnostics and functional lab testing at Lam Clinic in Tustin is a good next step. You can also ask about pricing, insurance, and how the process works. A Treatment Coordinator will contact you shortly. For immediate help, call 714-709-8000.
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