Leah Bolsius, MD
Leah Bolsius, MD is a provider specialising in Student in an Organized Health Care Education/Training Program in Boston, MA, registered under NPI 1003619610.
Getting there
Here is what surrounds this office in Boston, based on OpenStreetMap data collected Aug 29, 2026. Parking is available about 771 ft away. There is EV charging 0.33 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 480 ft away, served by Ave Louis Pasteur @ Longwood Ave. A pharmacy sits 0.28 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.20 mi away.
Getting here and what is nearby
Transit Longwood Ave @ Blackfan St 0.00 mi ~1 min
Coffee Starbucks 97 ft ~1 min
283 Longwood Avenue, Boston 02115
Mo-Fr 05:30-20:00; Sa-Su 06:00-19:00
Transit Longwood Ave @ Binney St 462 ft ~2 min
Transit Ave Louis Pasteur @ Longwood Ave 480 ft ~2 min
Hotel Inn at Longwood Medical 567 ft ~3 min
Coffee Starbucks 614 ft ~3 min
364 Brookline Avenue, Boston 02115
Mo-Fr 05:30-20:00
Parking Main Garage 651 ft ~3 min
340 Brookline Avenue
Parking Boston Latin School Side Parking Lot 675 ft ~3 min
78 Avenue Louis Pasteur, Boston 02115
Parking 771 ft ~3 min
45 Avenue Louis Pasteur
Restaurant Dunkin' 778 ft ~3 min
350 Longwood Avenue, Boston 02115
Mo-Fr 06:00-18:00; Sa-Su 06:00-16:00
Pharmacy CVS Pharmacy 850 ft ~4 min
350 Longwood Avenue, Boston 02115
Mo-Fr 06:30-22:00; Sa-Su 08:00-22:00
Restaurant Dunkin' 828 ft ~4 min
330 Brookline Avenue, Boston 02215
Mo-Tu 06:00-16:00; We 06:00-14:00; Th-Fr 06:00-16:00; Sa-Su 00:00-24:00
Restaurant McDonald's 831 ft ~4 min
340-350 Longwood Avenue, Boston 02115
Mo-Fr 06:30-22:00; Sa 07:00-20:00; Su 07:30-20:00
Coffee Caffè Nero 0.20 mi ~5 min
Convenience 7-Eleven 0.23 mi ~5 min
Convenience Food Mart 0.28 mi ~6 min
Gas station Shell 0.28 mi ~6 min
1600 Tremont Street
Pharmacy Walgreens 0.28 mi ~6 min
Grocery Stop & Shop 0.29 mi ~6 min
1620 Tremont Street, Boston 02120
Mo-Su 07:00-22:00
EV charging ChargePoint 0.33 mi ~7 min
Grocery Star Market 0.47 mi ~10 min
33 Kilmarnock Street, Boston 02215
Mo-Su 06:00-23:00
Convenience Hillside Market 0.50 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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.
What Student in an Organized Health Care Education/Training Program covers
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care. NUCC Health Care Provider Taxonomy, code 390200000X
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 | 1003619610 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 29, 2025 |
| Last updated | Apr 4, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
300 LONGWOOD AVE Boston, MA 02115 (617) 355-6000 |
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 | 6 | 1 | 9 | 6 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 3 | 1 | 9 | 6 | 2 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.