Quick answers
- Does Catherine M. Tisdall accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine M. Tisdall accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Catherine M. Tisdall see?
- In 2024, CMS data shows 425 Original Medicare patients and 4,425 services for Catherine M. Tisdall. This counts Original Medicare only and measures volume, not quality.
- What is Catherine M. Tisdall's NPI number?
- 1871556506. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Catherine M. Tisdall, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 425 |
|---|---|
| Services billed to Medicare | 4,425 |
| Different services or procedures | 64 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)633 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)380 services
- Destruction of precancer skin growth, 1 growth (17000)209 services
- Destruction of skin growth, 1-14 growths (17110)175 services
- Biopsy of related skin growth, first growth (11102)167 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure68%
- Arthritis52%
- Ischemic heart disease27%
- Osteoporosis25%
- Diabetes23%
Practice locations
Addresses where Catherine M. Tisdall is enrolled with Medicare (CMS data updated October 2, 2026).
- 12415 Bandera Rd, Suite 114Helotes, TX 78023 (210) 615‑7171
- 16110 Via ShavanoSan Antonio, TX 78249 (210) 615‑7171
- 524 Singing Oaks, Suite 280Bulverde, TX 78070 (210) 615‑7171
Group practices
Medicare enrollment lists Catherine M. Tisdall as a member of this group (CMS data updated October 2, 2026).
- Stephen Miller MD PA12 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Other clinicians in Stephen Miller MD PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871556506 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians