Gabriel Chain, MD
Gabriel Chain, MD is a Pediatric Hospice and Palliative Medicine Physician in Boston, MA, registered under NPI 1659831139. This provider registers 3 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
The practice address on file is 55 FRUIT ST, Boston, MA 02114. 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 |
|---|---|---|
| 1022192 | MA | Pediatric Hospice and Palliative Medicine… primary |
| 25MA11471000 | NJ | Pediatrics Physician |
| 1022192 | MA | Pediatrics Physician |
| C1-0026873 | DE | Pediatric Hospice and Palliative Medicine… |
| 25MA11471000 | NJ | Hospitalist Physician |
Licences are recorded in 3 states: MA, NJ, DE. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Pediatric Medicine
- PAC ID
- 6002283132
Medicare enrolment is recorded as approved under the provider type Practitioner - Pediatric Medicine. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 3 states
This provider holds licences in 3 states: Delaware, Massachusetts and New Jersey. The practice address on file is in Boston, MA, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 1022192
- Specialty
- Pediatric Hospice and Palliative…
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Hospice and Palliative Medicine covers
A pediatrician with special knowledge and skills to prevent and relieve the suffering experienced by patients with life-limiting illnesses. This specialist works with an interdisciplinary hospice or palliative care team to maximize quality of life while addressing physical, psychological, social and spiritual needs of both patient and family throughout the course of the disease, through the dying process, and beyond for the family. This specialist has expertise in the assessment of patients with advanced disease; the relief of distressing symptoms; the coordination of interdisciplinary patient and family-centered care in diverse venues; the use of specialized care systems including hospice; the management of the imminently dying patient; and legal and ethical decision making in end-of-life care. NUCC Health Care Provider Taxonomy, code 2080H0002X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2080H0002X | Pediatric Hospice and Palliative Medicine Physician Hospice and Palliative Medicine | 1022192 | MA | primary |
| 208000000X | Pediatrics Physician | 25MA11471000 | NJ | |
| 208000000X | Pediatrics Physician | 1022192 | MA | |
| 2080H0002X | Pediatric Hospice and Palliative Medicine Physician Hospice and Palliative Medicine | C1-0026873 | DE | |
| 208M00000X | Hospitalist Physician | 25MA11471000 | NJ |
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 | 1659831139 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 21, 2019 |
| Last updated | Jul 25, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
55 FRUIT ST Boston, MA 02114 (617) 726-2000 |
| Mailing address |
7 WYATT ST Somerville, MA 02143 |
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 | 6 | 5 | 9 | 8 | 3 | 1 | 1 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 1 | 9 | 7 | 3 | 2 | 1 | 6 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.