Is a punch biopsy of the skin covered by insurance?
Usually yes. A biopsy is how the diagnosis gets made, so plans cover it, but it is a procedure, which means it often goes toward the deductible instead of a flat copay. Code 11104 is the punch biopsy: a small round tool takes a deep sample of one spot and that sample goes out to a lab.
Usually
Diagnostic, but deductible first
Only the first
The first spot bills at the full rate. Every extra spot the same day goes on the add-on code 11105, which pays noticeably less.
2 bills, 1 visit
The lab reads the sample and bills its own claim, usually 88305. Patients who budgeted for one charge get a second envelope weeks later.
Punch beats shave
When techniques are mixed in one visit, the deeper one leads the claim. A punch outranks a shave biopsy, and an incisional one outranks both.
Deductible math
This is a procedure, not a plain office visit, so a flat copay often does not apply. One check shows the deductible and coinsurance the payer reports.
What would a real check show for this patient's 11104?
Pick a sample plan and type your per-lesion fee. This is the visibility a real-time check gives the desk for every actual patient, in under a second.
Eligibility readout · 11104
Sample- Coverage
- Active, $35 specialist copay
- Frequency
- No limit on medically necessary biopsies
- Patient share
- Type your fee to see it
Estimate from a sample plan. A real check reads the actual plan in under a second.
When 11104 is the right code
- A punch tool took the sample, not a blade
- The sample went through the full thickness of skin
- The goal was a diagnosis, not removing the spot
- Each extra spot uses the add-on code 11105
Documentation payers expect
Payers expect the site and size of each lesion, the technique used, and why a diagnosis was needed. Send separate specimens in separate containers so the lab can report each one on its own.
Why punch biopsies get denied
What happens after the biopsy
The sample goes to a lab and the lab files its own claim, usually 88305, so a second statement arrives one to three weeks later. If that lab sits outside the plan's network, the patient can owe more for a choice the practice made. Results often lead to a second procedure, an excision or a destruction, with a fresh hit to the deductible. Checking the plan before the biopsy, and knowing where the lab sits, is what keeps that second bill from becoming a complaint.
11104, quick answers
Does insurance cover a skin biopsy?
Most plans cover 11104 as a diagnostic procedure. On many plans it applies to the deductible rather than a flat copay, so the patient share varies a lot.
Why did I get a bill from a lab?
The practice bills the biopsy and the lab bills for reading the sample, usually as 88305. Two claims for one visit is normal here.
What if more than one spot is biopsied?
The first spot bills as 11104 and each extra spot as 11105. The add-on lines pay less, but they still add to the total.
Does Medicare cover a punch biopsy?
Yes, Medicare covers skin biopsies that are medically necessary, with the usual 20% coinsurance after the Part B deductible. The lab reading comes through as a separate Part B claim.
Is the office visit charged on top of the biopsy?
Only when the visit stands on its own and is documented and billed with modifier 25. Otherwise the biopsy fee covers the work of that day.
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Related: 11105 · 11102 · 88305
CPT is a registered trademark of the American Medical Association. This page is Valian's own plain-English summary for front-desk teams, not official CPT descriptor text, and is not billing or clinical advice. Coverage patterns are common plan behaviors; every plan differs. Verify benefits before the visit.