Doctor profile · Federal record

Dr. Justin Granstein, MD

Neurology Physician (CMS: Neurology) · Neurocritical Care Physician · Boston, MA

  • NPI 1699169599
  • Accepts Medicare
  • 11 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

Operates at 3 locations .

NPPES Updated May 11, 2026
Primary practice
110 Francis St Ste 3B
Boston, MA 022155501
(617) 632-7246
Additional location
101 the City Dr S
Orange, CA 928683201
(714) 880-7812
Additional location
200 S Manchester Ave Ste 210
Orange, CA 928683211
(714) 456-7495

Credentials & registration

NPPES · NUCC
NPI registered
March 2015 — 11 yrs on file
Profile last updated
July 20, 2023
Year of graduation
2015 — 11 yrs since
Specialty taxonomy
2084N0400X — NUCC code
State license (1)
Massachusetts #1015998

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1699169599. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
12
Distinct HCPCS
1
Medicare allowed
$4,187
HCPCS Description Services Patients Avg allowed
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist 12 11 $349

In context: peer comparison

Among 134 peers in Boston Neurology Physician, average services per provider: 234. This provider delivers 0.1× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$2,365
Transactions
20
Manufacturers
5
Payer (manufacturer) Industry Txns Amount
Medical Device Business Services, INC. 10 $1,746.24
DePuy Synthes Sales INC. 2 $274.63
Medtronic, INC. 1 $194.54
Imperative Care, INC 6 $131.32
Aesculap, INC. 1 $18.16

By nature of payment

Travel and Lodging
$1,511
Food and Beverage
$854

Frequently asked questions

Auto-generated from federal data
What is Dr. Justin Granstein's medical specialty?
Dr. Justin Granstein practices Neurology Physician in Boston, MA.
Where does Dr. Justin Granstein practice?
Dr. Justin Granstein practices at 110 Francis St Ste 3B, Boston, MA 022155501. Office phone: 6176327246.
What is Dr. Justin Granstein's NPI?
Dr. Justin Granstein's National Provider Identifier (NPI) is 1699169599, issued by NPPES.
Does Dr. Justin Granstein accept Medicare assignment?
Yes. Dr. Justin Granstein accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Justin Granstein commonly perform?
Top Medicare-reported procedures in 2023: Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist (HCPCS 36224). Source: CMS Medicare Physician & Other Practitioners file.