Ellen Zhan, MD
Ellen Zhan, MD is a Spinal Cord Injury Medicine Physician in West Roxbury, MA, registered under NPI 1720090228. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1400 VFW PKWY SCI SERVICE, West Roxbury, MA 02132. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 208361 | MA | Spinal Cord Injury Medicine Physician primary |
| 208361 | MA | Sports Medicine (Neuromusculoskeletal… |
This provider holds licence 208361 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 Spinal Cord Injury Medicine covers
A physician who addresses the prevention, diagnosis, treatment and management of traumatic spinal cord injury and non-traumatic etiologies of spinal cord dysfunction by working in an interdisciplinary manner. Care is provided to patients of all ages on a lifelong basis and covers related medical, physical, psychological and vocational disabilities and complications. NUCC Health Care Provider Taxonomy, code 2081P0004X
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 | |
|---|---|---|---|---|
| 2081P0004X | Spinal Cord Injury Medicine Physician Spinal Cord Injury Medicine | 208361 | MA | primary |
| 204C00000X | Sports Medicine (Neuromusculoskeletal Medicine) Physician | 208361 | 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 | 1720090228 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 13, 2006 |
| Last updated | Aug 13, 2012 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
1400 VFW PKWY SCI SERVICE West Roxbury, MA 02132 (857) 203-6574 Fax (857) 203-5553 |
| Mailing address |
11 LYON RD CHESTNUT HILL Brookline, MA 02467 |
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 | 7 | 2 | 0 | 0 | 9 | 0 | 2 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 4 | 0 | 0 | 9 | 0 | 2 | 4 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.