Johana Castro Wagner, M.D
Johana Castro Wagner, M.D is a Pediatric Allergy/Immunology Physician in Largo, FL, registered under NPI 1003175126.
Getting there
Here is what surrounds this office in Largo, based on OpenStreetMap data collected Sep 9, 2026. Parking is available about 0.30 mi away. There is EV charging 0.33 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 604 ft away, served by West Bay Drive & 1st Street Northwest. A pharmacy sits 738 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription.
Getting here and what is nearby
Transit Seminole Boulevard & Cleveland Avenue 120 ft ~1 min
Transit Seminole Boulevard & West Bay Drive West 163 ft ~1 min
Transit West Bay Drive & 1st Street Northwest 604 ft ~3 min
Hotel Holiday Inn Express & Suites Largo-Clearwater 658 ft ~3 min
Convenience 7-Eleven 700 ft ~3 min
EV charging 752 ft ~3 min
Pharmacy CVS Pharmacy 738 ft ~3 min
Hotel Hampton Inn & Suites 781 ft ~3 min
Parking 0.26 mi ~6 min
Parking 0.29 mi ~6 min
Parking 0.30 mi ~6 min
Restaurant DQ Grill & Chill 0.31 mi ~7 min
EV charging 0.33 mi ~7 min
Restaurant Dunkin' 0.43 mi ~9 min
600 Missouri Avenue North, Largo 33770
05:00-20:00
Restaurant Roosterfish Grill 0.47 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 |
|---|---|---|
| ME124372 | FL | Pediatric Allergy/Immunology Physician primary |
This provider holds licence ME124372 issued in FL. 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 - Allergy/immunology
- PAC ID
- 2466723218
- Enrollment ID
- I20170811003077
Medicare enrolment is recorded as approved under the provider type Practitioner - Allergy/immunology. 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 Allergy/Immunology covers
A pediatrician who specializes in the diagnosis and treatment of allergies, allergic reactions, and immunologic diseases in children. NUCC Health Care Provider Taxonomy, code 2080P0201X
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 | 1003175126 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 9, 2012 |
| Last updated | Aug 10, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | M.D |
| Practice address |
11200 SEMINOLE BLVD STE 310 Largo, FL 33778 (727) 397-8557 Fax (727) 397-4459 |
| Mailing address |
1800 DR MARTIN LUTHER KING JR ST N St Petersburg, FL 33704 |
| Other identifiers |
020623000
· Medicaid (FL) DQI18 · Other (FL) |
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 | 1 | 7 | 5 | 1 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 7 | 1 | 1 | 4 |
Sum = 44 · next multiple of 10 = 50 · 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.