Sara Cahill, MD
Sara Cahill, MD is a Hospitalist Physician in Boston, MA, registered under NPI 1003439944. 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 Boston, based on OpenStreetMap data collected Sep 3, 2026. Parking is available about 842 ft away at MASCO Building. There is EV charging 0.49 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 519 ft away, served by Brookline Ave @ Longwood Ave. A pharmacy sits 0.43 mi from the entrance (Fenway Health Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 779 ft away.
Getting here and what is nearby
Restaurant Dunkin' 104 ft ~1 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
Parking Main Garage 224 ft ~1 min
340 Brookline Avenue
Transit Brookline Ave opp Short St 257 ft ~1 min
Transit Brookline Ave @ Short St 284 ft ~2 min
Transit Brookline Ave @ Longwood Ave 519 ft ~2 min
Coffee Starbucks 527 ft ~2 min
364 Brookline Avenue, Boston 02115
Mo-Fr 05:30-20:00
Parking 596 ft ~3 min
45 Avenue Louis Pasteur
Restaurant Dunkin' 614 ft ~3 min
Mo-Fr 06:00-17:00; Sa-Su 09:00-15:00
Hotel Inn at Longwood Medical 664 ft ~3 min
Pharmacy CVS Pharmacy 711 ft ~3 min
350 Longwood Avenue, Boston 02115
Mo-Fr 06:30-22:00; Sa-Su 08:00-22:00
Restaurant McDonald's 669 ft ~3 min
340-350 Longwood Avenue, Boston 02115
Mo-Fr 06:30-22:00; Sa 07:00-20:00; Su 07:30-20:00
Coffee Starbucks 762 ft ~3 min
283 Longwood Avenue, Boston 02115
Mo-Fr 05:30-20:00; Sa-Su 06:00-19:00
Coffee Caffè Nero 779 ft ~3 min
Parking MASCO Building 842 ft ~4 min
375 Longwood Avenue
Grocery Star Market 0.35 mi ~8 min
33 Kilmarnock Street, Boston 02215
Mo-Su 06:00-23:00
Convenience 7-Eleven 0.39 mi ~8 min
Pharmacy CVS Pharmacy 0.42 mi ~9 min
Pharmacy Fenway Health Pharmacy 0.43 mi ~9 min
1340 Boylston Street, Boston 02115
Convenience Food Mart 0.44 mi ~9 min
Gas station Shell 0.44 mi ~9 min
1600 Tremont Street
EV charging Boston Supercharger 0.45 mi ~10 min
Grocery Stop & Shop 0.45 mi ~9 min
1620 Tremont Street, Boston 02120
Mo-Su 07:00-22:00
Convenience 7-Eleven 0.46 mi ~10 min
Grocery H Mart 0.47 mi ~10 min
1028 Beacon Street, Brookline 02446
Hotel Residence Inn Boston Back Bay/Fenway 0.48 mi ~10 min
EV charging ChargePoint 0.49 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
| Licence | State | Specialty |
|---|---|---|
| 1014151 | MA | Hospitalist Physician primary |
| ETLL-1003 | MA | Internal Medicine Physician |
This provider holds licence 1014151 issued in MA. 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
- 8921428913
- Enrollment ID
- I20230628000944
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 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 | |
|---|---|---|---|---|
| 208M00000X | Hospitalist Physician | 1014151 | MA | primary |
| 207R00000X | Internal Medicine Physician | ETLL-1003 | MA |
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 | 1003439944 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 27, 2020 |
| Last updated | Jun 24, 2023 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
330 BROOKLINE AVE Boston, MA 02215 (617) 667-7000 |
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 | 9 | 9 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 3 | 9 | 9 | 8 |
Sum = 66 · next multiple of 10 = 70 · check digit = 4 · actual last digit = 4
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.