Ki Won Seo, M.D.
Ki Won Seo, M.D. is a Hospitalist Physician in Plainview, NY, registered under NPI 1003236423. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Plainview, based on OpenStreetMap data collected Sep 13, 2026. Parking is available about 0.20 mi away. The nearest transit stop is 946 ft away, served by Old Country Road & Joel Place. A pharmacy sits 921 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription.
Getting here and what is nearby
Transit Old Country Road & Rex Place 793 ft ~4 min
Parking 815 ft ~4 min
Transit Old Country Road & Gerhard Place 889 ft ~4 min
Pharmacy CVS Pharmacy 921 ft ~4 min
Transit Old Country Road & Joel Place 946 ft ~4 min
Restaurant Subway 930 ft ~4 min
1022 Old Country Road, Plainview 11803
08:30-21:30
Gas station Speedway 1,029 ft ~4 min
Parking 1,018 ft ~4 min
Parking 0.20 mi ~4 min
Convenience Speedway 0.21 mi ~5 min
Grocery Lidl 0.25 mi ~5 min
1054 Old Country Road, Plainview 11803
Mo-Su 08:00-21:00
Restaurant Dunkin' Donuts 0.30 mi ~6 min
Restaurant Panera Bread 0.38 mi ~8 min
1082 Old Country Road, Plainview 11803
Mo-Th 06:30-21:00; Fr 06:30-21:30; Sa 07:00-21:30; Su 07:00-21:00
Gas station Applegreen 0.46 mi ~10 min
Gas station Gulf 0.49 mi ~10 min
160 Manetto Hill Road, Plainview 11803
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 |
|---|---|---|
| 290456 | NY | Internal Medicine Physician |
| 290456 | NY | Hospitalist Physician primary |
This provider holds licence 290456 issued in NY. 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 - Hospitalist
- PAC ID
- 7315212552
Enrolled in Medicare 6 times, across 6 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Pennsylvania | I20171013001904 | Practitioner - Hospitalist |
| New York | I20171120001799 | Practitioner - Hospitalist |
| Ohio | I20180214001658 | Practitioner - Hospitalist |
| California | I20230522003100 | Practitioner - Internal Medicine |
| Oregon | I20230724001958 | Practitioner - Internal Medicine |
| Louisiana | I20250710002245 | Practitioner - Internal Medicine |
Medicare enrolment is recorded as approved under the provider type Practitioner - Hospitalist. There are 6 separate enrolment records across 6 states (PA, NY, OH, CA, OR, LA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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 Hospitalist covers
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients. NUCC Health Care Provider Taxonomy, code 208M00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | 290456 | NY | |
| 208M00000X | Hospitalist Physician | 290456 | NY | 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 | 1003236423 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 24, 2014 |
| Last updated | Jan 4, 2018 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
54 CENTRAL PARK RD Plainview, NY 11803 (718) 670-2000 |
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 | 3 | 6 | 4 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 3 | 3 | 4 | 4 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
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.