Justin Granstein, MD
Neurology Physician · Boston, MA
Justin Granstein, MD is a neurology physician with a practice address in Boston, Massachusetts, and NPI 1699169599, issued on Mar 27, 2015. Check the license (Massachusetts 1015998, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Justin Granstein
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- 1015998 MA
Self-reported in NPPES; status is on the state search - Practice location
- 110 Francis St Ste 3B, Boston, MA 02215
- Phone
- (617) 632-7246
- Enumerated
- Mar 27, 2015
- Record last updated
- Jul 20, 2023
- Medicare enrollment
- Enrolled (PECOS I20230912000288); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 964 in Massachusetts → Look up another NPI →
Also registered at 110 Francis St Ste 3B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eryn BoothPhysician Assistant1265273189
- Rebecca Clapham, PA-CPhysician Assistant1457902124
- Alison CorbinAcute Care Nurse Practitioner1427560184
- Erica Gutierrez, PA-CPhysician Assistant1174928386
- Emily Martyn, NPAcute Care Nurse Practitioner1134442767
- Siobhan McDonough, PA-CPhysician Assistant1710723911
Verify Justin Granstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1015998Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $2,364.89
20 payments; by number, the most common kind was food and beverage; the largest payer was Medical Device Business Services, Inc. The 10,858 providers of this specialty with any payment received $8,318.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin Granstein among 964 neurology physician records in Massachusetts
Justin Granstein, MD is one of 964 neurology physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 76% of them.
- NPI issued2015 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2015 · median 2006 among the 612 with a school on file
- Record last updated2023 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
524 neurology physician records list a practice address in Boston
They are 524 of the 41,865 NPPES records with a practice address in Boston, and 964 neurology physician records in Massachusetts.
All 964 in Massachusetts → Every provider in Boston → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Louis Caplan, MDBoston, MA 022151306833561
- Bernard Chang, M.D.Boston, MA 022151851339154
- Ina Djonlagic, MDBoston, MA 022151760440564
- Roy Freeman, M.D.Boston, MA 022151518905876
- Christopher Gibbons, M.D.Boston, MA 022151093762601
- Rocio Lopez-Diego, M.D., PH.D.Boston, MA 022151043266182
- Pushpa Narayanaswami, MDBoston, MA 022151326040197
- Trudy Pang, M.D.Boston, MA 022151366496440
Common questions
What is Justin Granstein, MD's NPI number?
Justin Granstein, MD's National Provider Identifier (NPI) is 1699169599, issued on Mar 27, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Justin Granstein, MD located?
The NPPES record lists a practice address at 110 Francis St Ste 3B, Boston, MA, 02215. Phone: (617) 632-7246. Providers update this record themselves, so call before visiting.
How can I verify Justin Granstein, MD's license?
NPPES lists Massachusetts license number 1015998, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.