DR. JOANNA BARNETT & ASSOCIATES INC
DR. JOANNA BARNETT & ASSOCIATES INC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003587072, based in Sterling, VA. It is classified under Optometrist.
Getting there
Here is what surrounds this office in Sterling, based on OpenStreetMap data collected Oct 8, 2026. Parking is available about 0.36 mi away at Dulles Town Center Park & Ride. The nearest transit stop is 0.32 mi away, served by Nokes Blvd & City Center Blvd. If you arrive early, there is a coffee shop 64 ft away.
Getting here and what is nearby
Coffee Starbucks 64 ft ~1 min
Restaurant Taco Bell 83 ft ~1 min
Convenience Street Corner News 207 ft ~1 min
Restaurant Bourbon Boulevard 374 ft ~2 min
Restaurant The Cheesecake Factory 397 ft ~2 min
21076 Dulles Town Circle, Sterling 20166
Parking 579 ft ~3 min
Transit Dulles Town Center Mall 711 ft ~3 min
Parking 709 ft ~3 min
Transit City Center Blvd & Mirage Way 0.29 mi ~6 min
Transit Nokes Blvd & City Center Blvd 0.32 mi ~7 min
Hotel Courtyard Dulles Town Center 0.36 mi ~8 min
Parking Dulles Town Center Park & Ride 0.36 mi ~8 min
21021 Atlantic Boulevard, Sterling 20166
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
- Status
- Approved
- Provider type
- Part B Supplier - Clinic/group Practice
- PAC ID
- 1557709326
- Enrollment ID
- O20240329002528
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. 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 Optometrist covers
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system. NUCC Health Care Provider Taxonomy, code 152W00000X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003587072 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Sep 21, 2021 |
| Last updated | Sep 21, 2021 |
| Status | Active |
| Practice address |
21100 DULLES TOWN CIR STE 297 Sterling, VA 20166 (703) 655-1634 Fax (703) 766-1493 |
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 | 5 | 8 | 7 | 0 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 8 | 5 | 0 | 5 |
Sum = 48 · next multiple of 10 = 50 · 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.