Dr. Gabriel Simon Chain, MD
- Hospital affiliations
- 1
- Industry payments
- $133
- Medical groups
- 3
- State license
- 1
- Year NPI issued
- 2019
- Practice address
- 300 1st Ave, Charlestown, MA 02129
- Practice phone
- Call (617) 952-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Spaulding Rehabilitation Hospital - Boston
Charlestown, Massachusetts
Find Dr. Chain's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gabriel Simon Chain is a pediatrician in Charlestown, Massachusetts
Dr. Chain practices at Spaulding Rehabilitation Hospital - Boston in Charlestown, Massachusetts.
Dr. Chain's NPI, 1659831139, was assigned on March 21, 2019. Dr. Chain holds New Jersey license 25MA11471000.
- NPI
- 1659831139NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002283132
- NPI enumeration date
- March 21, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 952-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gabriel Simon Chain practices at Spaulding Rehabilitation Hospital - Boston in Charlestown, Massachusetts
Dr. Chain's primary practice is Spaulding Rehabilitation Hospital - Boston, at 300 1st Ave, Charlestown, MA 02129 in Suffolk County. The practice phone is (617) 952-5000.
- Spaulding Rehabilitation Hospital - Boston300 1st Ave, Charlestown, MA 02129 · Suffolk CountyPhone(617) 952-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gabriel Simon Chain is affiliated with 2 sites of care and 3 medical groups
Dr. Chain's primary practice is Spaulding Rehabilitation Hospital - Boston in Charlestown, Massachusetts. Dr. Chain is also affiliated with Massachusetts General Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Chain to 2 more medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gabriel Simon Chain's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chain practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Spaulding Rehabilitation Hospital - Boston | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gabriel Simon Chain is one of 2,101 pediatricians in Massachusetts
Pediatrics is Dr. Chain's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Chain is licensed in New Jersey.
Specialties and state licenses
- Pediatrics, New JerseyPrimary
Pediatricians near Dr. Chain
Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gabriel Simon Chain's patients have a median age of 14
Across all payers, Dmand AI patient panel data puts Dr. Chain's median patient age at 14, with 58% women.
Dr. Chain's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 14
Patient panel by sex, all payers
- Women58%
- Men42%
Source: Dmand AI Patient Panel Data
How Dr. Gabriel Simon Chain takes part in Medicare
Dr. Chain accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Dr. Gabriel Simon Chain received $133 in industry payments from 2022 to 2025
CMS Open Payments shows 9 general payments to Dr. Chain from 1 drug or device company from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $133.
General payments to Dr. Chain by program year, 2022 to 2025
Companies that paid Dr. Chain the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gabriel Simon Chain's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gabriel Simon Chain
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gabriel Simon Chain's NPI number?
Dr. Gabriel Simon Chain's NPI number is 1659831139. It was assigned on March 21, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Gabriel Simon Chain?
Dr. Gabriel Simon Chain is a pediatrician in Charlestown, Massachusetts. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Gabriel Simon Chain practice?
Dr. Chain practices at 300 1st Ave, Charlestown, MA 02129. Dr. Chain's primary practice is Spaulding Rehabilitation Hospital - Boston in Charlestown, Massachusetts. Dmand AI also links Dr. Chain to 2 medical groups.
What is Dr. Gabriel Simon Chain's office phone number?
The practice phone on file for Dr. Chain is (617) 952-5000.
What is Dr. Gabriel Simon Chain's medical license number?
Dr. Chain holds New Jersey license 25MA11471000.
Which hospitals is Dr. Gabriel Simon Chain affiliated with?
Dr. Chain is affiliated with Massachusetts General Hospital.
What medical group is Dr. Gabriel Simon Chain part of?
Dr. Chain is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Chain to 2 more medical groups.
Does Dr. Gabriel Simon Chain accept Medicare?
Yes. CMS lists Dr. Chain as accepting Medicare assignment.
Has Dr. Gabriel Simon Chain received payments from drug or device companies?
CMS Open Payments shows $133 in general payments to Dr. Chain from 1 company from 2022 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Gabriel Simon Chain been practicing?
Dr. Chain graduated from medical school in 2017, 9 years ago.
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