Alyssa Stiefel, CRNP
Alyssa Stiefel, CRNP is a Pediatric Nurse Practitioner in Philadelphia, PA, registered under NPI 1003447962. 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 Philadelphia, based on OpenStreetMap data collected Aug 28, 2026. Parking is available about 0.51 mi away. A pharmacy sits 0.39 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.49 mi away.
Getting here and what is nearby
Parking 3600 Civic Center Boulevard Garage 694 ft ~3 min
3600 Civic Center Boulevard, Philadelphia 19104
Restaurant Five Guys 0.28 mi ~6 min
3714 Spruce Street, Philadelphia 19104
11:00-21:30
Restaurant El Taco 0.29 mi ~6 min
3716 Spruce Street, Philadelphia 19104
Mo-Sa 11:00-21:30
Restaurant Just Salad 0.30 mi ~6 min
3728 Spruce Street, Philadelphia 19104
Mo-Fr 10:30-19:00
Convenience Wawa 0.32 mi ~7 min
Coffee Starbucks 0.39 mi ~8 min
3401 Walnut Street, Philadelphia 19104
Mo-Fr 05:30-20:00; Sa,Su 06:00-20:00
Pharmacy CVS Pharmacy 0.39 mi ~8 min
3401 Walnut Street, Philadelphia 19104
Mo-Fr 08:00-21:00; Sa,Su 08:30-18:00
Hotel Hilton Inn at Penn 0.40 mi ~9 min
Coffee Avril 50 0.42 mi ~9 min
3406 Sansom Street, Philadelphia 19104
Mo-Fr 07:30-18:00; Sa 10:00-17:00
Parking 0.46 mi ~10 min
Convenience Wawa 0.47 mi ~10 min
Coffee Haraz Coffee House 0.49 mi ~10 min
3421 Chestnut Street, Philadelphia 19104
Su-Th 06:30-22:00; Fr-Sa 06:30-23:00
Hotel Sheraton Philadelphia University City Hotel 0.51 mi ~11 min
Parking 0.51 mi ~11 min
Ludlow Street, Philadelphia 19104
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 |
|---|---|---|
| SP021291 | PA | Pediatric Nurse Practitioner primary |
This provider holds licence SP021291 issued in PA. 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 - Nurse Practitioner
- PAC ID
- 7012377781
- Enrollment ID
- I20230713002596
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. 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 Pediatrics covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LP0200X
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 | 1003447962 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 30, 2020 |
| Last updated | Jan 30, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | CRNP |
| Practice address |
3401 CIVIC CENTER BLVD Philadelphia, PA 19104 (215) 590-1000 |
| Mailing address |
1642 WAVERLY ST Philadelphia, PA 19146 |
| Other names |
Alyssa Diminick Former Legal Business Name |
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 | 4 | 4 | 7 | 9 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 4 | 5 | 9 | 3 |
Sum = 58 · next multiple of 10 = 60 · check digit = 2 · actual last digit = 2
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.