Nestor Sainz Rueda, MD
Nestor Sainz Rueda, MD is a Family Medicine Physician in Boston, MA, registered under NPI 1003444563.
Getting there
Here is what surrounds this office in Boston, based on OpenStreetMap data collected Sep 2, 2026. Parking is available about 746 ft away. There is EV charging 0.38 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 0.35 mi away, served by Nashua St @ Science Park. A pharmacy sits 0.41 mi from the entrance (Star Market Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 905 ft away.
Getting here and what is nearby
Parking Fruit Street Garage 354 ft ~2 min
Parking North Grove Street Garage 427 ft ~2 min
Hotel The Liberty Hotel 498 ft ~2 min
Restaurant Scampo 486 ft ~2 min
215 Charles Street, Boston 02114
Mo-Su 11:30-23:00
Restaurant Finagle a Bagel 579 ft ~3 min
Coffee Blank Street Coffee 702 ft ~3 min
Restaurant Dunkin' 684 ft ~3 min
296 Cambridge Street, Boston 02114
Mo-Su 06:00-19:00
Hotel Wyndham Boston Beacon Hill 722 ft ~3 min
Parking 746 ft ~3 min
165 Cambridge Street, Boston 02114
Convenience Top Shelf 855 ft ~4 min
161 Charles Street, Boston 02114
Coffee Gong Cha 872 ft ~4 min
Coffee Starbucks 905 ft ~4 min
222 Cambridge Street, Boston 02114
Mo-Fr 05:30-21:00; Sa-Su 06:00-21:00
Pharmacy CVS Pharmacy 951 ft ~4 min
Grocery Whole Foods Market 971 ft ~4 min
181 Cambridge Street, Boston 02114
Mo-Su 07:00-22:00
Hotel The Whitney Hotel 1,025 ft ~4 min
Transit Martha Rd @ Amy Court 0.25 mi ~5 min
Convenience Beacon Hill Market 0.26 mi ~6 min
Mo-Su 07:00-22:00
Convenience 7-Eleven 0.29 mi ~6 min
122-128 Cambridge Street, Boston 02114
06:00-24:00
Transit Cambridge St @ Bowdoin St 0.34 mi ~7 min
Pharmacy Rite Aid 0.34 mi ~7 min
100 Cambridge Street, Boston 02114
Mo-Fr 07:00-20:00; Sa 08:00-18:00; Su 09:00-18:00
Transit Nashua St @ Science Park 0.35 mi ~7 min
EV charging ChargePoint 0.35 mi ~8 min
EV charging 0.36 mi ~8 min
EV charging ChargePoint 0.38 mi ~8 min
Pharmacy Star Market Pharmacy 0.41 mi ~9 min
Grocery Star Market 0.41 mi ~9 min
90 Causeway Street, Boston 02114
Mo-Su 06:00-23:00
Grocery DeLuca's Market 0.44 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 |
|---|---|---|
| 1019480 | MA | Family Medicine Physician primary |
This provider holds licence 1019480 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 - Family Practice
- PAC ID
- 0749640654
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Florida | I20230724001446 | Practitioner - Family Practice |
| Massachusetts | I20241003000583 | Practitioner - Family Practice |
Medicare enrolment is recorded as approved under the provider type Practitioner - Family Practice. There are 2 separate enrolment records across 2 states (FL, MA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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 Family Medicine covers
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity. NUCC Health Care Provider Taxonomy, code 207Q00000X
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 | 1003444563 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 31, 2020 |
| Last updated | Aug 28, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
55 FRUIT ST Boston, MA 02114 (800) 711-4644 |
| Other identifiers |
118787700
· Medicaid (FL) |
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 | 4 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 4 | 8 | 5 | 3 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.