A board-certified dermatologist is the primary doctor who diagnoses and treats alopecia. Dermatologists have specialized training in skin, hair, and nail disorders, making them the most qualified physicians to identify the specific type of hair loss you’re experiencing and recommend the right treatment. Your primary care doctor can do an initial evaluation, but most cases benefit from a dermatologist’s expertise, and some types of hair loss require one.
Why Dermatologists Are the Go-To Specialist
Dermatologists complete years of residency training focused on conditions affecting the skin, hair, and nails. This gives them in-depth knowledge of the many causes of hair loss, which range from autoimmune attacks on hair follicles to hormonal shifts, nutritional deficiencies, infections, and genetic patterns. The American Academy of Dermatology specifically notes that board-certified dermatologists have the expertise to diagnose hair loss accurately and counsel patients on regrowth options.
Within dermatology, some doctors further specialize in hair and scalp disorders. You may see terms like “dermatotrichologist” or “trichiatrist,” both of which refer to board-certified dermatologists who focus specifically on hair conditions. These specialists can prescribe medications, perform biopsies, and order lab work, which distinguishes them from non-medical trichologists.
Trichologists vs. Dermatologists
Trichologists are hair and scalp specialists, but they are not typically medical doctors. They study hair care and scalp conditions within a more limited scope and often focus on cosmetic concerns like hair texture, breakage, and product-related damage. They cannot prescribe medication, perform biopsies, or order blood tests. If your hair loss involves inflammation, scarring, bald patches, or a suspected medical condition, a dermatologist is the appropriate choice. A trichologist may be helpful as a complement for cosmetic guidance, but not as a substitute for medical evaluation.
When Your Primary Care Doctor Is Enough
Many people first mention hair loss to their primary care doctor, and that’s a reasonable starting point. A primary care clinician can check for common underlying causes by ordering blood tests. The most frequently checked markers include ferritin (which reflects your iron stores), thyroid-stimulating hormone (to rule out thyroid disease), and androgen levels in women who have diffuse thinning without bald patches. If these tests reveal a hormonal imbalance, thyroid problem, or nutritional deficiency, your primary care doctor may be able to treat the root cause directly.
However, a referral to a dermatologist is warranted when the type of hair loss is unclear, when there are signs of scarring or inflammation on the scalp, or when initial treatments aren’t working. Redness, scaling, pustules, or crusting on the scalp all point toward conditions that need specialized evaluation.
What Happens at a Dermatologist Visit
A dermatologist will start with a complete evaluation of your scalp, face, and nails. Nail changes like pitting or discoloration can provide clues about certain types of alopecia, particularly alopecia areata. The exam typically involves a few specific tools and techniques.
The hair pull test is one of the simplest. The doctor grasps about 50 to 60 hairs and gently tugs from root to tip. If more than five or six hairs come out easily, that signals active hair loss. You’ll usually be asked to skip washing your hair for at least 24 hours before this test.
Trichoscopy is another common step. It uses a magnifying instrument (essentially a dermoscope applied to the scalp) to examine hair follicles and the scalp surface without any cutting or discomfort. Different types of hair loss leave distinct visual signatures. Pattern hair loss shows hairs of varying thickness growing from the same area. Alopecia areata produces characteristic “exclamation mark” hairs, short broken strands that taper near the root. Fungal infections create comma-shaped or corkscrew-shaped hairs. These patterns help the dermatologist narrow the diagnosis quickly.
If the cause remains uncertain, or if scarring hair loss is suspected, a scalp biopsy may be necessary. This involves removing one or two small tissue samples (about 4 millimeters across) from the affected area under local anesthesia. The samples are sectioned both horizontally and vertically to give a complete picture of what’s happening at different levels of the hair follicle.
Why Scarring Hair Loss Needs Urgent Referral
Not all hair loss is reversible, and this distinction matters for how urgently you need to see a specialist. Non-scarring types of alopecia, like pattern hair loss, alopecia areata, and telogen effluvium (stress-related shedding), damage the hair bulb but leave the follicle’s regenerative stem cells intact. With effective treatment, hair can regrow.
Scarring alopecia, also called cicatricial alopecia, is fundamentally different. The inflammation destroys the follicle’s stem cells permanently and replaces them with scar tissue. No existing treatment can regenerate a destroyed follicle. This makes early diagnosis critical: the goal shifts from regrowing hair to stopping further loss before more follicles are permanently damaged. Scarring alopecia accounts for roughly 7% of patients seen in specialist hair loss clinics, so while it’s not the most common type, it’s far from rare.
Distinguishing scarring from non-scarring alopecia can be challenging even for experienced clinicians, since several forms of scarring hair loss look similar to each other in advanced stages. A dermatologist may need magnification to confirm the absence of follicular openings in the bald area, along with biopsy results to identify the specific subtype.
Treatments a Dermatologist Can Offer
The treatment plan depends entirely on which type of alopecia you have. For androgenetic alopecia (pattern hair loss), the most common approach combines topical or oral medications that either stimulate hair growth or block the hormonal process that shrinks follicles. These are available in both topical and oral forms, and your dermatologist will choose based on your specific situation and preferences.
For alopecia areata, which is an autoimmune condition where the immune system attacks hair follicles, treatment has changed significantly in recent years. The FDA approved the first targeted oral therapy for severe alopecia areata in June 2022, followed by two additional approvals in 2023 and 2024. These medications work by calming the specific immune pathway responsible for the attack on hair follicles. They’re prescribed for adults and, as of 2023, for children aged 12 and older with severe cases. Before these approvals, treatment options for extensive alopecia areata were limited and largely off-label.
For scarring alopecia, treatment focuses on suppressing the inflammation to preserve remaining follicles. Once the disease is controlled, some patients pursue hair transplant surgery or cosmetic camouflage for the areas already affected.
Insurance and Cost Considerations
Insurance coverage for alopecia treatment varies widely. Diagnostic visits, blood work, and biopsies are generally covered as medical evaluations. Treatments are where coverage gets complicated. Many insurers have historically denied coverage for alopecia medications, classifying hair loss as cosmetic. Even newer FDA-approved therapies for alopecia areata have faced denials when plans require prior authorization or limit coverage to other conditions those drugs were originally approved for.
Common reasons for denial include the insurer deeming the treatment experimental, requiring a different FDA-approved diagnosis, or requesting documentation that the hair loss causes significant medical or psychological impact. If you’re prescribed a medication that gets denied, your dermatologist’s office can often submit an appeal with supporting clinical documentation. It’s worth asking your doctor’s staff about their experience navigating coverage for your specific treatment before filling the prescription.