Katherine Sides, MD
Katherine Sides, MD is an Emergency Medicine Physician in San Marcos, TX, registered under NPI 1003041484. This provider registers 2 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
Here is what surrounds this office in San Marcos, based on OpenStreetMap data collected Sep 1, 2026. Parking is available about 0.43 mi away. The nearest transit stop is 0.42 mi away, served by Spring Marc. A pharmacy sits 856 ft from the entrance (Medpark Pharmacy), which helps if you leave with a prescription.
Getting here and what is nearby
Parking CTMC Walking Trail Parking Area 681 ft ~3 min
Pharmacy Medpark Pharmacy 856 ft ~4 min
Medical Parkway #A, San Marcos
Transit Cabana Beach 887 ft ~4 min
Restaurant Wienerschnitzel 0.32 mi ~7 min
Transit Palazzo 0.34 mi ~7 min
Gas station Sam's Club 0.39 mi ~8 min
Transit Spring Marc 0.42 mi ~9 min
Parking 0.43 mi ~9 min
Convenience On the Run 0.47 mi ~10 min
2041 South Interstate 35, San Marcos 78666
Convenience 7-Eleven 0.47 mi ~10 min
Gas station Exxon 0.49 mi ~10 min
Gas station Shell 0.49 mi ~10 min
Restaurant Taste of China Super Buffet 0.49 mi ~10 min
1721 South Interstate 35, San Marcos 78666
Restaurant Jack in the Box 0.50 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 157074 | NC | Student in an Organized Health Care… |
| P1925 | TX | Emergency Medicine Physician primary |
Licences are recorded in 2 states: NC, TX. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Emergency Medicine
- PAC ID
- 7012184039
- Enrollment ID
- I20120820001084
Medicare enrolment is recorded as approved under the provider type Practitioner - Emergency Medicine. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 2 states
This provider holds licences in 2 states: North Carolina and Texas. The practice address on file is in San Marcos, TX, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 157074
- Specialty
- Student in an Organized Health Care…
- Licence
- P1925
- Specialty
- Emergency Medicine Physician
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Emergency Medicine covers
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury. NUCC Health Care Provider Taxonomy, code 207P00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 390200000X | Student in an Organized Health Care Education/Training Program | 157074 | NC | |
| 207P00000X | Emergency Medicine Physician | P1925 | TX | primary |
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 | 1003041484 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 28, 2009 |
| Last updated | Mar 5, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | MD |
| Practice address |
1301 WONDER WORLD DR CENTRAL TEXAS MEDICAL CENTER San Marcos, TX 78666 (512) 353-8979 Fax (512) 753-3698 |
| Mailing address |
2105 GOODRICH AVE APT 6 Austin, TX 78704 |
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 | 0 | 0 | 3 | 0 | 4 | 1 | 4 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 4 | 2 | 4 | 7 |
Sum = 46 · next multiple of 10 = 50 · check digit = 4 · actual last digit = 4
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.