Patrick Day, MD
Patrick Day, MD is a Pediatric Cardiology Physician in Austin, TX, registered under NPI 1003376138.
Getting there
Here is what surrounds this office in Austin, based on OpenStreetMap data collected Sep 14, 2026. Parking is available about 591 ft away. There is EV charging 0.32 mi from the office (AISD Performing Arts Center) — useful if you are driving in from out of town. The nearest transit stop is 950 ft away, served by 4826 Mueller/Philomena. If you arrive early, there is a coffee shop 0.48 mi away.
Getting here and what is nearby
Transit Philomena/James Wheat 455 ft ~2 min
Parking 521 ft ~2 min
Parking 577 ft ~3 min
Parking 591 ft ~3 min
EV charging DCMC GARAGE 1 STATION 615 ft ~3 min
Restaurant Chi'Lantro 713 ft ~3 min
1201 Barbara Jordan Boulevard, Austin 78723
10:30-22:00
Grocery Sprouts Farmers Market 744 ft ~3 min
1201 Barbara Jordan Boulevard, Austin 78723
07:00-22:00
Restaurant Pokeatery 781 ft ~3 min
Transit Lancaster/Barbara Jordan 854 ft ~4 min
Restaurant Chipotle 828 ft ~4 min
1201 Barbara Jordan Boulevard, Austin 78723
10:45-23:00
Coffee Starbucks 890 ft ~4 min
1201 Barbara Jordan Boulevard, Austin 78723
Mo-Su 05:00-22:00
Transit 4826 Mueller/Philomena 950 ft ~4 min
Coffee La Madeleine 0.22 mi ~5 min
1201 Barbara Jordan Boulevard, Austin 78723
07:00-21:30
Hotel Residence Inn Austin-University Area 0.27 mi ~6 min
EV charging AISD Performing Arts Center 0.32 mi ~7 min
Grocery Mosaic Market 0.33 mi ~7 min
Hotel Deluxe Inn 0.38 mi ~8 min
Hotel Origin Hotel 0.42 mi ~9 min
Coffee Starbucks 0.48 mi ~10 min
1801 East 51st Street, Austin 78723
Mo-Su 05:30-22:00
Gas station Exxon 0.49 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 |
|---|---|---|
| T6547 | TX | Pediatric Cardiology Physician primary |
This provider holds licence T6547 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Pediatric Cardiology covers
A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease. NUCC Health Care Provider Taxonomy, code 2080P0202X
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 | 1003376138 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 24, 2019 |
| Last updated | Jun 4, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
4900 MUELLER BLVD Austin, TX 78723 (512) 324-0000 |
| Mailing address |
5904 AYLFORD CT Austin, TX 78739 |
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 | 3 | 7 | 6 | 1 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 7 | 3 | 1 | 6 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.