Doug Longo, APRN
Doug Longo, APRN is an Acute Care Nurse Practitioner in Saint Louis, MO, registered under NPI 1003276866.
Getting there
Here is what surrounds this office in Saint Louis, based on OpenStreetMap data collected Sep 15, 2026. Parking is available about 0.49 mi away. The nearest transit stop is 867 ft away, served by Grand at Chouteau. A pharmacy sits 0.26 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.28 mi away.
Getting here and what is nearby
Parking 342 ft ~2 min
Parking LaSalle Parking Garage 373 ft ~2 min
Transit 624 ft ~3 min
Transit Grand at Vista 733 ft ~3 min
Transit Grand at Chouteau 867 ft ~4 min
Restaurant Captain D's 0.22 mi ~5 min
Restaurant Rally's 0.23 mi ~5 min
Pharmacy Walgreens 0.26 mi ~6 min
3527 Chouteau Avenue, Saint Louis 63103
Coffee Crave Coffeehouse 0.28 mi ~6 min
Coffee Starbucks 0.28 mi ~6 min
Hotel HavenHouse St. Louis - Hospital Guest House 0.36 mi ~8 min
Convenience QuikTrip 0.46 mi ~10 min
Gas station QuikTrip 0.48 mi ~10 min
Parking 0.49 mi ~10 min
500 Prospect Avenue, Saint Louis 63110
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 |
|---|---|---|
| 2016006780 | MO | Acute Care Nurse Practitioner primary |
This provider holds licence 2016006780 issued in MO. 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
- 2668769316
- Enrollment ID
- I20171107001438
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 Acute Care covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LA2100X
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 | 1003276866 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 7, 2016 |
| Last updated | Oct 30, 2020 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | APRN |
| Practice address |
1201 S GRAND BLVD Saint Louis, MO 63104 (314) 257-8000 Fax (314) 977-1877 |
| Mailing address |
1008 S SPRING AVE Saint Louis, MO 63110 |
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 | 2 | 7 | 6 | 8 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 7 | 3 | 8 | 3 |
Sum = 54 · next multiple of 10 = 60 · 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.