Andrew Hsu, M.D.
Andrew Hsu, M.D. is a Gastroenterology Physician in Portland, ME, registered under NPI 1003270471.
Getting there
Here is what surrounds this office in Portland, based on OpenStreetMap data collected Sep 15, 2026. Parking is available about 0.50 mi away. The nearest transit stop is 0.42 mi away, served by Congress St + Frederic St.
Getting here and what is nearby
Parking Patient/Guest Parking 148 ft ~1 min
Parking Medical Provider Parking Only 222 ft ~1 min
Transit 884 ft ~4 min
Grocery Save-A-Lot 0.30 mi ~7 min
Restaurant D'Angelo Grilled Sandwiches 0.36 mi ~8 min
275 Saint John Street, Portland 04102
Hotel Chadwick Bed & Breakfast 0.40 mi ~8 min
Restaurant Pizza Villa 0.40 mi ~8 min
Grocery Hong Kong Market 0.41 mi ~9 min
Transit 0.42 mi ~9 min
Transit Congress St + Frederic St 0.42 mi ~9 min
Hotel The Inn at Saint John 0.42 mi ~9 min
Restaurant Sonny's Variety 0.42 mi ~9 min
Hotel West End Inn 0.45 mi ~9 min
146 Pine Street, Portland 04102
Parking 0.50 mi ~11 min
15 Forest Street, Portland 04102
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 |
|---|---|---|
| MD27103 | ME | Gastroenterology Physician primary |
| 22622 | NH | Gastroenterology Physician |
Licences are recorded in 2 states: ME, NH. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Gastroenterology
- PAC ID
- 0648562876
- Enrollment ID
- I20230607002543
Medicare enrolment is recorded as approved under the provider type Practitioner - Gastroenterology. 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.
Licensed in 2 states
This provider holds licences in 2 states: Maine and New Hampshire. The practice address on file is in Portland, ME, but a licence in another state usually means they see patients there too — either at a second location or 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
- MD27103
- Specialty
- Gastroenterology 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 Gastroenterology covers
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs. NUCC Health Care Provider Taxonomy, code 207RG0100X
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 | |
|---|---|---|---|---|
| 207RG0100X | Gastroenterology Physician Gastroenterology | MD27103 | ME | primary |
| 207RG0100X | Gastroenterology Physician Gastroenterology | 22622 | NH |
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 | 1003270471 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 11, 2016 |
| Last updated | Aug 23, 2023 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
155 FORE RIVER PKWY Portland, ME 04102 (207) 535-1100 Fax (207) 879-8787 |
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 | 7 | 0 | 4 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 7 | 0 | 4 | 5 |
Sum = 49 · next multiple of 10 = 50 · 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.