Robert Cao, M.D.
Robert Cao, M.D. is a General Practice Physician in Arlington, VA, registered under NPI 1003103698. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 Arlington, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.41 mi away. The nearest transit stop is 796 ft away, served by Wilson Blvd at N Quinn St. A pharmacy sits 0.45 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 922 ft away.
Getting here and what is nearby
Hotel Homewood Suites Rosslyn 503 ft ~2 min
1900 North Quinn Street, Arlington 22209
Transit Langston Blvd at N Scott St 602 ft ~3 min
Transit Lee Hwy at N Rhodes St 684 ft ~3 min
Coffee IceBerry 701 ft ~3 min
1715 Wilson Boulevard, Arlington 22209
Mo-Fr 11:30-21:45; Sa-Su 11:00-21:45
Restaurant Pho 75 691 ft ~3 min
Restaurant Mele Bistro 692 ft ~3 min
Restaurant Guerra Steakhouse 696 ft ~3 min
1725 Wilson Boulevard, 22209
Mo-Fr 17:00-21:00; Sa-Su 11:30-14:00, 17:00-21:00
Coffee Eclairons 718 ft ~3 min
1737 Wilson Boulevard, Arlington 22209
Mo-Th 07:30-19:00; Fr 07:30-20:00; Sa 08:00-20:00; Su 08:00-19:00
Convenience 7-Eleven 736 ft ~3 min
Transit Wilson Blvd at N Quinn St 796 ft ~4 min
Coffee Gong Cha 922 ft ~4 min
1650 Wilson Boulevard, Arlington 22209
Mo-Th 11:15-21:30; Fr 11:15-22:30; Sa 12:15-22:30; Su 12:15-21:30
Gas station Exxon 1,029 ft ~4 min
Convenience Tiger Mart 0.20 mi ~4 min
Hotel Sonesta Select Arlington Rosslyn 0.26 mi ~6 min
Grocery Safeway 0.27 mi ~6 min
1525 North Wilson Boulevard, Arlington 22209
06:00-23:00
Convenience 7-Eleven 0.31 mi ~7 min
Parking Colonial Parking 0.34 mi ~7 min
Grocery MOM's Organic Market 0.35 mi ~7 min
1901 North Veitch Street, Arlington 22201
Mo-Sa 09:00-21:00; Su 09:00-20:00
Hotel Residence Inn Arlington Rosslyn 0.38 mi ~8 min
Gas station Sunoco 0.39 mi ~8 min
1830 Fort Myer Drive, Arlington 22209
Tu 06:00-23:59
Parking 0.40 mi ~9 min
1910 North Vance Street, Arlington 22201
Parking 0.41 mi ~9 min
1932 North Vance Street, Arlington 22201
Pharmacy CVS Pharmacy 0.45 mi ~9 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 |
|---|---|---|
| 125063983 | IL | Anesthesiology Physician |
| MD045982 | DC | Procedural Dermatology Physician |
| MD045982 | DC | General Practice Physician primary |
Licences are recorded in 2 states: IL, DC. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
Licensed in 2 states
This provider holds licences in 2 states: District of Columbia and Illinois. Multi-state licensure often means the provider works near a state border, covers more than one office, or delivers care by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- MD045982
- Specialty
- Procedural Dermatology Physician
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What General Practice covers
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. NUCC Health Care Provider Taxonomy, code 208D00000X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207L00000X | Anesthesiology Physician | 125063983 | IL | |
| 207NS0135X | Procedural Dermatology Physician Procedural Dermatology | MD045982 | DC | |
| 208D00000X | General Practice Physician | MD045982 | DC | primary |
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 | 1003103698 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 1, 2011 |
| Last updated | Dec 7, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | M.D. |
| Practice address |
1860 N SCOTT ST APT 639 Arlington, VA 22209 (337) 534-9256 |
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 | 0 | 3 | 6 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 6 | 6 | 9 |
Sum = 52 · next multiple of 10 = 60 · 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.