Harry Choi, MD
Harry Choi, MD is an Internal Medicine Physician in Philadelphia, PA, registered under NPI 1003435595.
Getting there
Here is what surrounds this office in Philadelphia, based on OpenStreetMap data collected Aug 29, 2026. Parking is available about 0.35 mi away. The nearest transit stop is 0.43 mi away. A pharmacy sits 0.42 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.33 mi away.
Getting here and what is nearby
Restaurant Dunkin' 0.22 mi ~5 min
3437 Walnut Street, Philadelphia 19104
Mo-Fr 05:00-19:00; Sa-Su 06:00-17:00
Restaurant Five Guys 0.22 mi ~5 min
3714 Spruce Street, Philadelphia 19104
11:00-21:30
Coffee Starbucks 0.23 mi ~5 min
3401 Walnut Street, Philadelphia 19104
Mo-Fr 05:30-20:00; Sa,Su 06:00-20:00
Pharmacy CVS Pharmacy 0.23 mi ~5 min
3401 Walnut Street, Philadelphia 19104
Mo-Fr 08:00-21:00; Sa,Su 08:30-18:00
Restaurant Goldie 0.23 mi ~5 min
3401 Walnut Street, Philadelphia 19104
Mo-Fr 11:00-20:00; Sa 11:00-19:00; Su 11:00-17:00
Coffee Avril 50 0.26 mi ~6 min
3406 Sansom Street, Philadelphia 19104
Mo-Fr 07:30-18:00; Sa 10:00-17:00
Hotel Hilton Inn at Penn 0.26 mi ~6 min
Convenience Wawa 0.27 mi ~6 min
Parking 3600 Civic Center Boulevard Garage 0.29 mi ~6 min
3600 Civic Center Boulevard, Philadelphia 19104
Coffee Haraz Coffee House 0.33 mi ~7 min
3421 Chestnut Street, Philadelphia 19104
Su-Th 06:30-22:00; Fr-Sa 06:30-23:00
Parking 0.34 mi ~7 min
Hotel Sheraton Philadelphia University City Hotel 0.35 mi ~7 min
Parking 0.35 mi ~8 min
Ludlow Street, Philadelphia 19104
Grocery Giant 0.36 mi ~8 min
3401 Chestnut Street, Philadelphia 19104
07:00-22:00
Convenience 7-Eleven 0.41 mi ~9 min
Convenience Old Nelson 0.42 mi ~9 min
Pharmacy Walgreens 0.42 mi ~9 min
Transit 0.43 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 |
|---|---|---|
| MD479455 | PA | Internal Medicine Physician primary |
This provider holds licence MD479455 issued in PA. 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
- Order And Referring Only - Internal Medicine
- PAC ID
- 6305205311
- Enrollment ID
- I20230710001341
Medicare enrolment is recorded as approved under the provider type Order And Referring Only - 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
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 | 1003435595 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 14, 2020 |
| Last updated | Jan 28, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
3400 SPRUCE ST Philadelphia, PA 19104 (215) 662-2200 |
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 | 3 | 5 | 5 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 3 | 1 | 5 | 9 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
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.