Molly Warthan, MD
As reported to Medicare
- Credential
- MD
- Primary specialty
- Dermatology
- Medical school graduation
- 2004
- Medical school
- University of Texas Medical Branch at Galveston
- National Provider Identifier (NPI)
- 1073773867
Total number of removal of skin cancer procedures this clinician billed to Medicare in the most recent 12-month claims period, according to CMS.
Percentile rank of 746 procedures compared to other clinicians with a primary specialty of dermatology, micrographic dermatologic surgery, plastic and reconstructive surgery, otolaryngology, ophthalmology, general surgery, hand surgery, or surgical oncology who have billed Medicare for at least one removal of skin cancer procedure in the same period.
The figures above reflect only procedures that this clinician billed to Medicare, according to CMS. Therefore, they may not reflect the total number of procedures this clinician performed during the 12-month reporting period. See Understanding CMS Data below.
Source: Centers for Medicare & Medicaid Services (August 18, 2026 release).
Molly Warthan's Removal of Skin Cancer Billing Volume Compared to Peers
Reading the curve: find a volume along the bottom, and the line gives the percentile of clinicians with a primary specialty of dermatology, micrographic dermatologic surgery, plastic and reconstructive surgery, otolaryngology, ophthalmology, general surgery, hand surgery, or surgical oncology at or below it. The marked point is this clinician. The shaded block covers the 267 clinicians CMS reports as 1-10, because CMS suppresses counts below 11. The axis runs from 0 to 7,349, the highest count CMS reports in the group, and gives low counts more room than high ones so the whole range fits. The labels under the axis mark the 25th percentile, the median and the 75th percentile.
Source: Centers for Medicare & Medicaid Services (August 18, 2026 release).
| Percentile | Removal of Skin Cancer Procedures billed to Medicare |
|---|---|
| 10th | 24 |
| 20th | 97 |
| 30th | 175 |
| 40th | 271 |
| 50th | 378 |
| 60th | 500 |
| 70th | 644 |
| 80th | 828 |
| 90th | 1,160 |
| Highest | 7,349 |
Previous data releases
CMS refreshes this data "on a quarterly basis, as technically feasible." The table shows this clinician's figures from each CMS data release.
| CMS data release | Removal of skin cancer procedures billed | Percentile rank |
|---|---|---|
| August 18, 2026 Current | 746 | 76% |
| August 11, 2026 Prior | 746 | 76% |
About these releases. Each release counts procedures over what CMS describes as "a one-year observation window, with a lookback beginning three months prior to the present day", allowing three months for claims to be submitted and processed. CMS does not publish the start and end dates of the window behind any release, and consecutive releases may cover overlapping periods, or the same period with later-arriving claims added.
Understanding CMS Data
CMS's "Removal of skin cancer" category combines specific billing codes for Mohs micrographic surgery to calculate the number of times each clinician billed Medicare for "Removal of skin cancer." In Mohs surgery, the clinician removes a skin cancer in stages and examines each stage under a microscope during the same visit. CMS counts each billing code separately, so a single skin cancer that takes more than one stage can contribute more than once to this total. CMS reports removal of a skin cancer by standard excision, without microscopic examination during the visit, in a different category, so this total does not include it. CMS reports only procedures that clinicians billed to Original Medicare and Medicare Advantage. Therefore, CMS's procedure volume data does not include procedures that clinicians may have performed on patients who have other health care coverage (e.g., commercial insurance, self-pay, or the VA). Billing variation and coding errors can also affect CMS's data. Therefore, the number of procedures that CMS reports for a clinician may be higher or lower than the actual number of removal of skin cancer procedures a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of dermatology, micrographic dermatologic surgery, plastic and reconstructive surgery, otolaryngology, ophthalmology, general surgery, hand surgery, or surgical oncology (as reported to Medicare) are presented.
National Percentile Calculation
CMS publishes its own percentile for this data using a single, national pool that also includes clinicians with other primary specialties, such as Physician Assistant and Nurse Practitioner. We use CMS's percentile formula, but restrict the comparison group to clinicians with a primary specialty of dermatology, micrographic dermatologic surgery, plastic and reconstructive surgery, otolaryngology, ophthalmology, general surgery, hand surgery, or surgical oncology, so our number answers a narrower question: how does this clinician's procedure volume compare with other clinicians who billed Medicare for at least one removal of skin cancer procedure and reported one of those as their primary specialty?