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GABRIEL SIMON CHAIN MD
NPI 1659831139
Pediatrics - Hospice and Palliative Medicine in Boston, MA

Active since March 21, 2019PECOS EnrolledAccepts Medicare Assignment

NPPES record last updated: July 25, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 18, 2025, Jul 7, 2022, Aug 7, 2020 and 1 more (4 updates tracked since 2019).

About Gabriel Simon Chain Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GABRIEL SIMON CHAIN MD (NPI 1659831139) is an individual hospice and palliative medicine provider in Boston, Massachusetts, licensed in Massachusetts (1022192) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1659831139
Entity TypeIndividualMale
Primary Taxonomy2080H0002X
Provider Legal NameGABRIEL SIMON CHAINCredential: MD
Location Address55 FRUIT STBoston, MA 02114-2696
Mailing Address7 Wyatt StSomerville, MA 02143-3917 · (718) 650-0302
Phone(617) 726-2000
Sole ProprietorYes
Medical School CMSOtherGraduated 2017
Enumeration DateMarch 21, 2019
Last NPPES UpdateJuly 25, 20254 updates tracked since enumeration
NPPES CertifiedJuly 25, 2025
✔ NPI 1659831139 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPediatrics · Hospice and Palliative MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080H0002X
Licenses✔ Licensed in MA · 1022192✔ Licensed in DE · C1-0026873
Definition
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.
Also ListedPediatricsTaxonomy 208000000X · License 25MA11471000 (NJ), 1022192 (MA)
Also ListedHospitalistTaxonomy 208M00000X · License 25MA11471000 (NJ)
55 FRUIT ST, Boston, MA 02114
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X MULTIPLE SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Taro Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gabriel Simon Chain Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6002283132
PECOS Enrollment IDI20250905001729
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Gabriel Chain reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Massachusetts General Physicians Organization Inc
Same address
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
The General Hospital Corporation
Same address
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000
Children's Healthcare Associates Of New Jersey, PC
230 mi
Neonatal-Perinatal Medicine
1 PLAINSBORO RD, CHOP CARE NETWORK AT PRINCETON MEDICAL CENTER
Plainsboro, NJ 08536
  • Reassigned Medicare billing, New Jersey enrollment
  • Medicare enrollment name: Children's Health Care Associates Of New Jersey PC
  • 190 clinicians in this Medicare group
NPI 1194964593 (609) 497-4431

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

STUTI GIRISH SHROFF MD, MBBS
Pathology (Anatomic Pathology)
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 726-2971
NANCY WANG M.D.
Internal Medicine (Hematology & Oncology)
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (017) 724-4000
DR. DUSAN HANIDZIAR M.D., PH.D.
Anesthesiology
55 FRUIT ST, GRAY-BIGELOW 444
BOSTON, MA 02114
Suffolk County (617) 726-3030
JOHN JOSEPH DANKO DO
Physical Medicine & Rehabilitation
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 726-2000
DR. MICHAEL ANDREW LOBRITZ M.D, PH.D.
Internal Medicine (Infectious Disease)
55 FRUIT ST, DIVISION OF INFECTIOUS DISEASE, GRJ-504
BOSTON, MA 02114
Suffolk County (617) 724-9248
MS. KELLY ELISHA TRECARTIN NP
Nurse Practitioner (Acute Care)
55 FRUIT ST, BIGALOW 852 F
BOSTON, MA 02114
Suffolk County (617) 726-7400
JAMIE MARIE ALLEN NP
Nurse Practitioner
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 724-4410
DR. DHAVAL SANJEEV KOLTE M.B.B.S., PH.D.
Internal Medicine (Cardiovascular Disease)
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 643-3238

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gabriel Chain's NPI number?

The NPI number for Gabriel Chain is 1659831139. It was assigned to this individual provider in the NPPES registry on March 21, 2019.

Where is Gabriel Chain located?

Gabriel Chain practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 726-2000.

What is Gabriel Chain's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Hospice and Palliative Medicine, with taxonomy code 2080H0002X.

Is Gabriel Chain enrolled in Medicare?

Yes. Gabriel Chain is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Gabriel Chain's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gabriel Chain reassigns Medicare benefits to 3 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA) and Children's Healthcare Associates Of New Jersey, PC (Plainsboro, NJ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gabriel Chain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gabriel Chain accept?

Health plans from AmeriHealth Caritas Next and Taro Health list Gabriel Chain as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gabriel Chain was last updated on July 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.