California gets more sun, more outdoor living, and more skin cancer than almost any other state. Skin cancer is the most common cancer in the country, and most cases are found in people over 65. This guide answers the practical question: does Medicare pay for a skin check, and what happens when the dermatologist finds something?
The Short Answer: Routine Screening vs Medically Necessary Care
Medicare draws a hard line between a routine screening and medically necessary care. A full-body skin exam for someone with no symptoms and no suspicious spots is not a covered benefit. Medicare has preventive screening benefits for colon and breast cancer, but not for skin cancer, and that surprises many people. The moment there is a reason to look, though, coverage changes. If you have a spot that is new, changing, bleeding, itching, or worrying you, an exam to evaluate it is medically necessary and Part B covers it. So the real question is rarely whether Medicare will pay. It is whether the visit is recorded as routine or diagnostic.
What Medicare Part B Covers for Skin Cancer
Diagnostic Skin Exams
When you see a doctor or dermatologist about a specific concern, that visit is a diagnostic service under Part B. It covers the exam of a suspicious mole, a check of a spot your primary doctor flagged, and follow-up exams after past skin cancer treatment. Many dermatology visits by telehealth are covered too, which helps seniors in rural California counties far from a specialist.
Biopsies and Treatment
If the doctor finds something concerning, Part B covers the biopsy, the lab analysis, and the treatment when the biopsy confirms cancer. Treatment can be a simple excision in the office, cryotherapy for precancerous spots called actinic keratoses, or Mohs surgery for larger or facial skin cancers. Mohs is the precise, layer-by-layer removal used often in California because so much skin cancer appears on the face, ears, and scalp. All of it is covered when a doctor documents it as medically necessary.
What You Pay Under Original Medicare
Under Original Medicare in 2026 you first pay the annual Part B deductible of $257, then 20 percent of the Medicare-approved amount, with no annual cap. A diagnostic dermatology visit runs roughly $90 to $200 approved, so your share is about $18 to $40, and a biopsy often adds $20 to $60. Mohs surgery for a confirmed skin cancer is larger and can leave a few hundred dollars in coinsurance. A Medigap policy covers most or all of that 20 percent, which is why people who need frequent skin checks value supplement coverage.
What You Pay Under a California Medicare Advantage Plan
Most California Medicare Advantage plans cover the same medically necessary dermatology, but you pay a flat copay instead of 20 percent coinsurance. A specialist copay usually runs $25 to $55, and the plan's yearly out-of-pocket maximum protects you if you need surgery. The catch is the network and the referral rule. Many California HMO plans require a referral from your primary doctor before they pay for a dermatologist, while PPO plans are more flexible but cost more out of network. Before you book, confirm the dermatologist is in network and ask whether a referral is needed.
| Service | Original Medicare | Typical California Medicare Advantage |
|---|---|---|
| Diagnostic dermatology visit | 20% after $257 deductible | $25 to $55 specialist copay |
| Skin biopsy | 20% coinsurance | Small copay or included in visit |
| Treatment of precancerous spots | 20% coinsurance | Copay per visit |
| Mohs surgery for skin cancer | Covered, 20% with no cap | Covered, copay under out-of-pocket max |
| Routine screening, no symptoms | Not covered | Not covered |
California tip: If your plan is an HMO, get the referral before the dermatology visit, not after. A skin check done without the required referral can be denied even when it was medically necessary. One call to your primary doctor's office usually fixes it the same week.
How to Get a Skin Check Covered
How the visit is described is the practical key. If you ask for a routine annual skin screening, the office may schedule it as preventive and you could owe the full cost. Instead, name the specific reason: the mole that looks different, the scalp spot that will not heal, or a personal history that makes you higher risk. Those diagnostic reasons belong in the visit notes. Your yearly Annual Wellness Visit does not include a full skin exam, but it is a good moment to point out a spot to your doctor, who can then refer you.
Medi-Cal and Skin Cancer Care
If you have both Medicare and Medi-Cal in California, this is one of the clearest wins of dual coverage. Medi-Cal pays the 20 percent Original Medicare leaves behind and covers the Part B deductible, so a medically necessary skin check, biopsy, and treatment usually cost you nothing. That removes the cost reason for delaying a worrying spot, and delay is the real danger with skin cancer.
Protecting your skin through a California summer:
- Use the ABCDE rule: Asymmetry, irregular Border, varied Color, Diameter over a quarter inch, and Evolving change
- Check your skin once a month, including scalp, ears, and back
- Wear a wide-brim hat, seek midday shade, and use sunscreen regularly
- Name the specific reason for the visit so it's billed as diagnostic, not routine
- Ask your HMO for the referral before the dermatology visit, not after
Coverage matters, but catching skin cancer early matters more, and you are the person most likely to notice a change first. Skin cancer treatment, much like cataract surgery, is well covered once a doctor confirms it is needed. If a loved one would rather read this in Spanish, our sister site Beneficios Medicare covers the same Medicare topics in Spanish.
Not sure what your plan pays for a dermatologist?
A free 15-minute review with a licensed California Medicare agent can confirm your specialist copay, check whether you need a referral, and compare plans so a skin check never waits on paperwork.
Request a Free Plan ReviewFrequently Asked Questions
Does Medicare cover skin cancer screening in California?
Not as a routine preventive screening. Medicare has no preventive benefit for skin cancer the way it does for colon and breast cancer. But if you have a suspicious spot, symptoms, or a personal history of skin cancer, the exam becomes medically necessary and Part B covers it at 80 percent after the 257 dollar deductible.
Do I need a referral to see a dermatologist with Medicare?
With Original Medicare, no referral is required. With a Medicare Advantage HMO plan you usually need a referral from your primary care doctor first. PPO plans generally do not. Always confirm the rule with your specific plan before booking.
How much does a skin biopsy cost with Medicare?
Under Original Medicare you pay 20 percent of the approved amount after the Part B deductible, often about 20 to 60 dollars for your share of a biopsy. A Medigap policy usually covers that 20 percent. With a Medicare Advantage plan you pay your plan copay instead.
Does Medicare cover treatment for skin cancer?
Yes. Once a biopsy confirms skin cancer, Part B covers treatment, including excision, cryotherapy, and Mohs surgery, when a doctor documents it as medically necessary. You pay 20 percent under Original Medicare or your plan copay under Medicare Advantage.