Zachary Oliff, DO
Zachary Oliff, DO is an Emergency Medicine Physician in Cambridge, MA, registered under NPI 1003300492. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Cambridge, based on OpenStreetMap data collected Sep 13, 2026. Parking is available about 0.41 mi away. There is EV charging 0.43 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 441 ft away, served by Beacon St @ Cooney St. A pharmacy sits 0.21 mi from the entrance (Skendarian Apothecary), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.32 mi away.
Getting here and what is nearby
Transit Cambridge St @ Camelia Ave 335 ft ~2 min
Transit Cambridge St @ Highland Ave 388 ft ~2 min
Transit Beacon St @ Cooney St 441 ft ~2 min
Restaurant Tall Order 444 ft ~2 min
Parking 507 ft ~2 min
Grocery Whole Foods Market 540 ft ~3 min
45 Beacon Street, Somerville 02143
Mo-Su 08:00-22:00
Pharmacy Walgreens 584 ft ~3 min
Restaurant Thai Hut 758 ft ~3 min
Pharmacy Inman Pharmacy 0.20 mi ~4 min
1414 Cambridge Street, Cambridge 02139
Mo-Fr 08:30-19:00; Sa 09:00-17:30; Su 09:00-15:00
Restaurant Moona 0.20 mi ~5 min
Pharmacy Skendarian Apothecary 0.21 mi ~5 min
1613 Cambridge Street, Cambridge 02138
Mo-Fr 08:00-18:00; Sa 09:00-14:00; Su 09:00-13:00
Coffee Broadsheet Coffee Roasters 0.23 mi ~5 min
Convenience Harvard Market 0.23 mi ~5 min
1627 Cambridge Street, Cambridge 02138
Mo-Fr 07:00-19:00; Sa 08:00-19:00
Coffee 1369 Coffee House 0.24 mi ~5 min
1369 Cambridge Street, Cambridge 02139
Mo-Fr 07:00-15:00; Sa-Su 08:00-16:00
Convenience Friendly Market 0.29 mi ~6 min
69;71 Springfield Street
Hotel Irving House 0.30 mi ~7 min
Coffee Barismo 0.32 mi ~7 min
Convenience 7-Eleven 0.34 mi ~7 min
Gas station Shell 0.34 mi ~7 min
287 Prospect Street, Cambridge 02139
Grocery Tropical Dimension Food Store 0.34 mi ~7 min
1262 Cambridge Street, Cambridge
Hotel The Amory Guest House 0.35 mi ~8 min
EV charging ChargePoint 0.38 mi ~8 min
Parking Broadway Garage 0.41 mi ~9 min
5 Felton Street
Parking 0.41 mi ~9 min
24 Dane Street, Somerville 02143
Grocery Market Basket 0.42 mi ~9 min
400 Somerville Avenue, Somerville 02143
Mo-Sa 07:00-21:00; Su 07:00-20:00
EV charging 0.43 mi ~9 min
Gas station Broadway Gas 0.44 mi ~9 min
320;322 Broadway
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 |
|---|---|---|
| 1015559 | MA | Emergency Medicine Physician primary |
This provider holds licence 1015559 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 - Emergency Medicine
- PAC ID
- 9931563103
- Enrollment ID
- I20230907001073
Medicare enrolment is recorded as approved under the provider type Practitioner - Emergency 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 Emergency Medicine covers
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury. NUCC Health Care Provider Taxonomy, code 207P00000X
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 | |
|---|---|---|---|---|
| 207P00000X | Emergency Medicine Physician | 1015559 | MA | 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 | 1003300492 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 19, 2018 |
| Last updated | Jul 10, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | DO |
| Practice address |
1493 CAMBRIDGE ST Cambridge, MA 02139 (617) 665-1000 |
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 | 3 | 0 | 0 | 4 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 0 | 0 | 4 | 9 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
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.