Margaret Ferris, R.N.
Margaret Ferris, R.N. is a Registered Nurse in Arlington, MA, registered under NPI 1003076944. 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 Arlington, based on OpenStreetMap data collected Sep 4, 2026. Parking is available about 979 ft away. The nearest transit stop is 827 ft away, served by Park Ave @ Florence Ave. If you arrive early, there is a coffee shop 0.49 mi away.
Getting here and what is nearby
Parking 396 ft ~2 min
Parking 510 ft ~2 min
Transit Park Ave @ Appleton St 617 ft ~3 min
Transit Park Ave @ Florence Ave 772 ft ~3 min
Transit Park Ave @ Florence Ave 827 ft ~4 min
Parking 979 ft ~4 min
Restaurant Home Taste 0.22 mi ~5 min
Restaurant Dunkin' 0.22 mi ~5 min
1234 Massachusetts Avenue, Arlington 02476
Restaurant Classic Cafe 0.23 mi ~5 min
1313 Massachusetts Avenue, Arlington 02476
Coffee The Roasted Granola Café 0.26 mi ~6 min
1346 Massachusetts Avenue, Arlington 02476
Tu-Fr 07:00-16:00; Sa-Su 07:00-12:00
Convenience Arlington Heights Convenience Store 0.26 mi ~6 min
1348 Massachusetts Avenue, Arlington 02476
Gas station Citgo 0.31 mi ~7 min
19 Park Avenue, Arlington 02476
Convenience Peter Pan Superette 0.32 mi ~7 min
3 Park Avenue, Arlington 02476
Grocery Maruichi Japanese Food and Deli 0.32 mi ~7 min
1398 Massachusetts Avenue, Arlington 02476
Mo-Su 10:00-19:00
Gas station Sunoco 0.38 mi ~8 min
Gas station Mobil 0.40 mi ~9 min
1116 Massachusetts Avenue, Arlington 02476
Coffee Starbucks 0.49 mi ~10 min
Grocery Trader Joe's 0.49 mi ~10 min
1427 Massachusetts Avenue, Arlington 02476
Mo-Su 08:00-21:00
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 |
|---|---|---|
| 238708 | MA | Registered Nurse primary |
This provider holds licence 238708 issued in MA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
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 Registered Nurse covers
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span. NUCC Health Care Provider Taxonomy, code 163W00000X
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 | 1003076944 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 13, 2008 |
| Last updated | Jun 13, 2008 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | R.N. |
| Practice address |
35 ASHLAND ST UNIT 1 Arlington, MA 02476 (617) 233-6171 |
| Mailing address |
PO BOX 750027 Arlington Heights, MA 02475 |
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 | 0 | 7 | 6 | 9 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 7 | 3 | 9 | 8 |
Sum = 56 · next multiple of 10 = 60 · 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.