NPI age
20 years
Enumerated 2006-04-12
● Active
Type 1 · Individual
Catherine M Tisdall, MD
Tisdall is 1 of 136 dermatology providers in San Antonio and 1 of 1632 in Texas.
Primary specialty
Dermatology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2009-10-27
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1632 active dermatology providers in Texas.
NPI age
20 years
↑ 4 yr above median (16 yr)
State licenses
1 state
8% of peers hold multiple states
Subspecialties
0
29% of peers hold subspecialties
NPI lifetime · 2006 → 2026
2006-04Enumerated in NPPES
2006
2026
Where they practice
Practice location
8431 Fredericksburg Rd, #100
San Antonio, TX 782293392
Mailing address
8431 Fredericksburg Rd, #100
San Antonio, TX 782293392
Specialties
-
Dermatology PrimaryA dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (TX) | P00605100 | MEDICARE RR |
| 01 (TX) | 8X5051 | BCBS |
| 01 (TX) | M5220 | LICENSE |
| 01 (TX) | 207N00000X | TAXONOMONY |
| 01 (TX) | 742935457 | TAX ID |
| 01 (TX) | DG9652 | MEDICARE RR GROUP PTAN |
| 01 (TX) | 00203V | MEDICARE PTAN GROUP |
Practice context
Part of a multi-provider practice. 4 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.