Fernando Karst, MD
Fernando Karst, MD is an Undersea and Hyperbaric Medicine (Preventive Medicine) Physician in San Antonio, TX, registered under NPI 1326148586. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 7940 FLOYD CURL DR STE 100, San Antonio, TX 78229. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| K2933 | TX | Undersea and Hyperbaric Medicine… primary |
| K2933 | TX | Specialist |
| K2933 | TX | Family Medicine Physician |
This provider holds licence K2933 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Undersea And Hyperbaric Medicine
- PAC ID
- 9739177429
Medicare enrolment is recorded as approved under the provider type Practitioner - Undersea And Hyperbaric Medicine. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Undersea and Hyperbaric Medicine covers
A specialist who treats decompression illness and diving accident cases and uses hyperbaric oxygen therapy to treat such conditions as carbon monoxide poisoning, gas gangrene, non-healing wounds, tissue damage from radiation and burns and bone infections. This specialist also serves as consultant to other physicians in all aspects of hyperbaric chamber operations and assesses risks and applies appropriate standards to prevent disease and disability in divers and other persons working in altered atmospheric conditions. NUCC Health Care Provider Taxonomy, code 2083P0011X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2083P0011X | Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Undersea and Hyperbaric Medicine | K2933 | TX | primary |
| 174400000X | Specialist | K2933 | TX | |
| 207Q00000X | Family Medicine Physician | K2933 | TX |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1326148586 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 25, 2006 |
| Last updated | Jun 30, 2024 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
7940 FLOYD CURL DR STE 100 San Antonio, TX 78229 (210) 297-5520 Fax (210) 297-0632 |
| Mailing address |
14329 SAN PEDRO AVE STE C San Antonio, TX 78232 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 3 | 2 | 6 | 1 | 4 | 8 | 5 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 4 | 6 | 2 | 4 | 7 | 5 | 7 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.