Chronic fatigue in Philadelphia is usually mismanaged by the 12-minute primary care visit: TSH gets checked, ferritin sometimes, and patients are told their labs are normal. A thorough fatigue workup includes a structured history, thyroid panel beyond TSH, iron studies including ferritin and saturation, vitamin D and B12, fasting insulin and HbA1c, sleep evaluation (often a home study), cortisol when indicated, and screening for autoimmune disease, sleep apnea, POTS, depression, and long COVID. Fishtown Medicine has the time to do the full workup and to act on the results.
The chronic fatigue conversation in Philadelphia primary care has been broken for at least two decades. The patient presents with persistent fatigue. The doctor orders a TSH and a CBC. The labs come back roughly normal. The patient is told "your labs are normal" and sent home. 6 months later they are back, more tired, sometimes more depressed, having lost faith in the system. Many of them eventually end up at an alternative-medicine clinic, sometimes with good results and sometimes with expensive nonsense.
This page is what a proper fatigue workup looks like at Fishtown Medicine in Philadelphia, the differential we work through, and what tends to help.
What "fatigue" is hiding
Persistent fatigue is the symptom; the underlying diagnosis is usually one or more of:
- Untreated sleep apnea (the most common single diagnosis we make in fatigue workups).
- Iron deficiency without anemia. Low ferritin and saturation cause fatigue years before they cause anemia on a CBC.
- Suboptimal thyroid. TSH in the upper-normal range with positive antibodies, or low free T3 with normal TSH.
- Vitamin D, B12 deficiency.
- Untreated depression or anxiety.
- Untreated insulin resistance. Affecting energy, sleep, and mood.
- Autoimmune disease (particularly Hashimoto's, lupus, celiac).
- Post-viral syndromes including long COVID and post-EBV.
- POTS / autonomic dysfunction.
- MCAS / mast cell activation.
- Untreated perimenopause or low testosterone.
- Adrenal insufficiency (rare but missed).
- Sleep disorders other than apnea (insomnia, restless legs, circadian misalignment).
- Medication side effects. Beta blockers, statins, SSRIs, antihistamines.
- Alcohol use.
- Chronic infections (less common).
- Cancer (uncommon as a sole presenting symptom but worth not missing).
The 12-minute visit rarely gets through this list. The 90-minute visit can.
What a thorough fatigue workup includes
For a patient presenting with persistent fatigue, the workup we run includes:
- Structured history. Onset, severity, pattern (worse mornings? worse evenings? post-exertional?), sleep, mood, alcohol, medications, weight, training, family history, prior infections.
- CBC, comprehensive metabolic panel.
- TSH, free T4, free T3, TPO antibodies.
- Iron studies: ferritin, iron, TIBC, transferrin saturation. Ferritin under 50 ng/mL is often clinically relevant even when CBC is normal.
- Vitamin D, B12, folate.
- HbA1c, fasting insulin.
- hsCRP, sedimentation rate.
- ANA when autoimmune disease is on the differential.
- Celiac panel when indicated.
- Cortisol (morning) when adrenal pathology is suspected.
- Testosterone (men), estradiol and FSH (women) when hormonal contribution is suspected.
- Sleep evaluation, often a home sleep study, given how common sleep apnea is in this population.
- EKG, sometimes tilt or stand test when POTS is suspected.
For the right patient: targeted testing for Lyme, EBV, viral panels, mast cell tryptase, and other less-common contributors.
What tends to help
The single most impactful interventions in chronic fatigue:
- Treat sleep apnea. Often the single biggest intervention.
- Replete iron when ferritin is suboptimal. Oral iron for most, IV iron for selected patients.
- Optimize thyroid including beyond TSH.
- Treat insulin resistance with training, nutrition, sometimes metformin or GLP-1s.
- Treat untreated depression or anxiety with combinations of therapy and medications as appropriate.
- Address sleep architecture beyond duration: caffeine timing, alcohol, screens, schedule consistency.
- Resistance training for the metabolic and energy effects.
- Address dysautonomia / POTS when present.
- Address mast cell activation when present.
- Consider hormonal contribution in perimenopause, menopause, and male hypogonadism.
What rarely helps: another round of "try harder to sleep," more caffeine, "B12 shots" without documented deficiency, generic adrenal protocols, expensive food sensitivity panels.
Fishtown Medicine
A 90-minute conversation with Dr. Ash. A written plan you can actually follow.
How chronic fatigue is managed at Fishtown Medicine
First visit is 90 minutes. We build the full picture and decide on the workup. Many patients come having had partial workups elsewhere; we fill in the gaps rather than re-running everything.
Follow-up at 4-6 weeks for results review and treatment planning. Then 1-3 month intervals as we work through interventions and re-test.
We coordinate with sleep medicine, neurology, rheumatology, and other specialties as needed. The primary care relationship holds the overall picture.
What it costs
Membership at Fishtown Medicine covers all visits and ongoing management; see pricing for current rates. All visits and ongoing management are inside the membership. Labs and medications are billed separately at the cheapest of insurance or cash.
Key Takeaways
- Chronic fatigue is usually one or more treatable conditions hiding behind "your labs are normal."
- Sleep apnea, iron deficiency without anemia, and suboptimal thyroid are the most common findings.
- A thorough workup takes time and a broader panel than the standard quick visit.
- Fishtown Medicine has the time and treats chronic fatigue as a diagnostic problem worth solving.
Related Services and Reading
-
Tired for Months, Labs "Normal": The Workup That Found It - a patient case walking through the full fatigue workup
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Lyme Disease Care - acute and chronic Lyme management
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MCAS Treatment - mast cell activation syndrome workup and management
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Low-Dose Naltrexone: A Physician's Guide - an off-label option for fibromyalgia, ME/CFS, and inflammatory pain
Frequently Asked Questions
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Dr. Ash reads every intake himself, and answers questions personally - usually within a few hours.
