Catherine Tisdall, MD
NPI 1871556506 · Dermatology Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Tisdall, MD is a Dermatology Physician provider in San Antonio, TX (NPI 1871556506).
Provider details
- NPI number
- 1871556506
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- M5220 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,959 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 633 | $6 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 380 | $126 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 209 | $44 |
| Destruction of Skin Growth, 1-14 Growths17110 | 175 | $106 |
| Biopsy of Related Skin Growth, First Growth11102 | 167 | $76 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clobetasol Propionate | 60 | 41 |
| Fluorouracil | 56 | 52 |
| Triamcinolone Acetonide | 52 | 33 |
| Ketoconazole | 38 | 20 |
| Clindamycin Phosphate | 26 | 15 |
| Metronidazole | 25 | 19 |
| Valacyclovir Hclbrand: Valacyclovir | 24 | 17 |
| Finasteride |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,968 across 83 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-12
- Last updated
- 2009-10-27
Frequently asked questions
- What is Catherine Tisdall's NPI number?
- Catherine Tisdall's National Provider Identifier (NPI) is 1871556506, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Tisdall's specialty?
- Catherine Tisdall is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Tisdall located?
- Catherine Tisdall's practice location on file with NPPES is 8431 Fredericksburg Rd, San Antonio, TX 78229-3392.
- What is Catherine Tisdall's phone number?
- The practice phone number listed in the NPPES registry for Catherine Tisdall is (210) 615-7171.
- Does Catherine Tisdall accept Medicare?
- Catherine Tisdall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Tisdall's NPI active?
- Yes — Catherine Tisdall's NPI (1871556506) is active in the NPPES registry as of the last update on 2009-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.