Gregory Barker
Gregory Barker is a Pediatric Cardiology Physician in Fort Worth, TX, registered under NPI 1003081308.
Getting there
Here is what surrounds this office in Fort Worth, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 0.23 mi away at Klabzuba Tower. The nearest transit stop is 503 ft away, served by 8th & Cooper. A pharmacy sits 0.31 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription.
Getting here and what is nearby
Restaurant Chick-fil-A 377 ft ~2 min
801 7th Avenue, Fort Worth 76104
Mo-Sa 06:30-22:00; Su off
Transit 8th & Cooper 406 ft ~2 min
Transit Pennsylvania & 8th - 7th 500 ft ~2 min
Transit 8th & Cooper 503 ft ~2 min
Parking 725 ft ~3 min
800 8th Avenue
Restaurant Einstein Bros. Bagels 0.20 mi ~4 min
1301 Pennsylvania Avenue, Fort Worth 76104
Mo-Fr 07:00-14:00
Parking 0.21 mi ~5 min
1325 Pennsylvania Ave., Fort Worth 76104
Parking Klabzuba Tower 0.23 mi ~5 min
936 South Lake Street, Fort Worth 76104
Restaurant Jimmy John's 0.24 mi ~5 min
Pharmacy CVS Pharmacy 0.31 mi ~7 min
Hotel Hotel Revel 0.35 mi ~7 min
Hotel Cambria Hotel 0.45 mi ~10 min
Hotel Homewood Suites 0.49 mi ~10 min
999 Jerome Street
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 |
|---|---|---|
| N4283 | TX | Pediatric Cardiology Physician primary |
This provider holds licence N4283 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 - Pediatric Medicine
- PAC ID
- 4789806365
- Enrollment ID
- I20141114001887
Medicare enrolment is recorded as approved under the provider type Practitioner - Pediatric 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.
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 | 1003081308 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 28, 2008 |
| Last updated | Apr 14, 2021 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
1500 COOPER ST Fort Worth, TX 76104 (682) 885-2140 Fax (817) 332-2506 |
| Mailing address |
PO BOX 733784 Dallas, TX 75373 |
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 | 8 | 1 | 3 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 8 | 2 | 3 | 0 |
Sum = 42 · next multiple of 10 = 50 · 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.