Yongsub Choi
Yongsub Choi is an Internal Medicine Physician in Green Bay, WI, registered under NPI 1003447681. 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 Green Bay, based on OpenStreetMap data collected Sep 3, 2026. Parking is available about 248 ft away. The nearest transit stop is 392 ft away, served by Green Bay St Vincent Hospital.
Getting here and what is nearby
Parking 165 ft ~1 min
Parking 234 ft ~1 min
Parking 248 ft ~1 min
Transit Green Bay St Vincent Hospital 392 ft ~2 min
Hotel Astor House Bed & Breakfast 0.26 mi ~6 min
Hotel Days Inn & Suites Green Bay WI. 0.27 mi ~6 min
Gas station Shell 0.37 mi ~8 min
510 South Monroe Avenue, Green Bay 54301
Convenience Shell 0.38 mi ~8 min
510 South Monroe Avenue, Green Bay 54301
Restaurant A&W 0.38 mi ~8 min
Grocery Webster Avenue Market 0.52 mi ~11 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 |
|---|---|---|
| 81281-20 | WI | Internal Medicine Physician primary |
This provider holds licence 81281-20 issued in WI. 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 - Internal Medicine
- PAC ID
- 5496127706
- Enrollment ID
- I20230215001315
Medicare enrolment is recorded as approved under the provider type Practitioner - Internal Medicine. 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 Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
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 | 81281-20 | WI | primary |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1003447681 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 31, 2020 |
| Last updated | Jan 26, 2023 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
744 S WEBSTER AVE Green Bay, WI 54301 (920) 433-3500 |
| Mailing address |
100 W WALNUT ST APT 306A Green Bay, WI 54303 |
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 | 6 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 4 | 5 | 6 | 7 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.