A dermatologist is the best doctor to see for hair loss. Dermatologists are the specialists trained to diagnose and treat conditions of the skin, hair, and nails, and they have the tools to determine exactly why your hair is thinning and what to do about it. That said, your primary care doctor is often a smart first stop, especially if you suspect something else in your body might be driving the problem.
Start With Your Primary Care Doctor
Your regular doctor can run blood work that rules out (or confirms) some of the most common medical causes of hair loss before you ever see a specialist. Iron deficiency is a frequent culprit, and a blood test measuring ferritin levels shows how much iron your body has stored. If you’ve also noticed fatigue, unexplained weight changes, or muscle weakness, your doctor may check your thyroid-stimulating hormone (TSH) level, since an underactive or overactive thyroid commonly triggers hair shedding. Elevated androgen hormones can also be identified through blood work, which is particularly relevant for women experiencing thinning along the part line or temples.
If your blood results come back normal, your primary care doctor will typically refer you to a dermatologist. If something does show up, treating the underlying condition (correcting an iron deficiency, adjusting thyroid medication) may be enough to slow or reverse your hair loss without needing a specialist at all.
Why a Dermatologist Is the Go-To Specialist
Dermatologists have diagnostic tools that go well beyond blood tests. During your visit, expect a combination of the following:
- Pull test: Your dermatologist gently tugs on several dozen hairs to see how many come out, which reveals what stage of shedding you’re in.
- Dermoscopy: A handheld magnifying device is pressed against your scalp, letting the doctor see follicle patterns, miniaturization, and inflammation invisible to the naked eye.
- Light microscopy: Hairs trimmed at their base are examined under magnification to detect structural disorders of the hair shaft itself.
- Scalp biopsy: In trickier cases, a small skin sample is taken and examined under a microscope to look at hair roots and rule out scarring or autoimmune conditions.
These exams let a dermatologist distinguish between pattern hair loss (the gradual, genetic kind), autoimmune conditions like alopecia areata, stress-related shedding, infections, and scarring forms of hair loss that require urgent treatment to prevent permanent damage. The distinction matters because treatments differ dramatically depending on the cause.
Trichologists: What They Can and Can’t Do
You may come across trichologists while searching for hair loss help. A trichologist is not a medical doctor. Trichology certification programs take anywhere from 12 weeks to 2 years and don’t require any medical prerequisites. Hairstylists, barbers, cosmetologists, or anyone with an interest in hair and scalp health can enroll.
Trichologists can recommend over-the-counter products and offer general wellness advice for scalp health, but they cannot prescribe medication, order blood tests, perform biopsies, or administer injections. A dermatologist can do everything a trichologist does while also having the medical training to diagnose diseases and prescribe treatments. If cost or access is steering you toward a trichologist, know that they may be a reasonable starting point for mild concerns, but any significant or persistent hair loss needs a medical evaluation.
When You Might Need a Hair Restoration Surgeon
Hair transplant surgery enters the picture only after a dermatologist has diagnosed your type of hair loss and confirmed you’re a good candidate. Not everyone is. Scarring conditions, active autoimmune hair loss, and unstable shedding patterns can all disqualify someone from surgery or lead to poor results.
If you do pursue transplantation, look for a surgeon certified by the American Board of Hair Restoration Surgery (ABHRS). ABHRS diplomates have passed specialty examinations and are required to personally perform the critical surgical steps, including creating extraction incisions for removing follicles and making the recipient incisions where grafts are placed. These steps cannot be delegated to technicians. Asking whether the surgeon holds ABHRS certification is a straightforward way to vet credentials.
What Insurance Will and Won’t Cover
Whether your insurance covers hair loss treatment depends almost entirely on the diagnosis. Alopecia areata, an autoimmune condition where the immune system attacks hair follicles, is generally recognized as a medical condition. Insurers like Aetna cover treatments for alopecia areata when specific criteria are met, including topical and injected therapies for mild cases (less than 50% scalp hair loss) and oral medications or light-based therapy for extensive cases.
Androgenetic alopecia, the most common type of hair loss (often called male- or female-pattern baldness), is classified differently. It’s typically considered cosmetic, meaning insurance won’t cover treatments like prescription topicals, oral medications, or hair transplant surgery. This is worth knowing before your first appointment so you can plan accordingly. Ask your insurance company directly about your coverage, referencing the specific diagnosis your doctor gives you.
Newer Treatments for Autoimmune Hair Loss
If you’re dealing with alopecia areata specifically, the treatment landscape has changed significantly in recent years. A class of medications called JAK inhibitors has been FDA-approved for severe cases, and the results are notable. In clinical trials, about one-third of patients taking baricitinib at the higher dose achieved 80% or more scalp hair coverage after 36 weeks. With continued treatment over two years, that number climbed to 90%. Two additional JAK inhibitors, deuruxolitinib and ritlecitinib, have also received FDA approval with similar short-term response rates.
These medications are prescribed by dermatologists and require ongoing monitoring through blood work. They represent a major shift for people with extensive alopecia areata who previously had limited options.
How to Prepare for Your First Appointment
Whichever doctor you see first, you’ll get more out of the visit if you come prepared. Before you go, note when you first noticed thinning or shedding, whether it’s concentrated in one area or diffuse, and whether anyone in your family has experienced hair loss. Write down all medications and supplements you currently take, since several common drugs can trigger hair shedding as a side effect.
Bring photos if you have them. A picture from six months or a year ago compared to today gives your doctor a visual timeline that’s far more useful than trying to describe the change verbally. If you’ve already tried over-the-counter treatments, mention those too, including how long you used them and whether you noticed any effect. The more context your doctor has, the faster they can narrow down the cause and get you on the right treatment path.