Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Gary D Johnson, MD

Individual provider Neurology Physician · NPI 1841226867

Gary D Johnson, MD practises Neurology in Smithfield, Rhode Island. Graduated from Perelman School of Med at the University of Pennsylvania in 1985, 41 years ago. Practices with Lifespan Physician Group Inc, a 1,125-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
41
Trained at
Perelman School of Med at the University of Pennsylvania
Licensed in
RI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

900 Douglas Pike
Smithfield, RI 02917-1879
Phone: (401) 618-5507
Fax: (866) 228-6713
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 593 Eddy St, Providence, RI 02903-4923 — (401) 444-3032
  • 1 James P Murphy Ind Hwy Ste 120, West Warwick, RI 02893-2366 — (401) 606-4600

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence MD08010 (RI)

Record details

NPI number1841226867
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 23, 2006
Last updated in NPPESDecember 18, 2025
Certification dateDecember 18, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROLOGY
Medical schoolPERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduated 1985 (41 years in practice)
Group practice Lifespan Physician Group Inc — 1125 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients64
Services billed 108 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • The Miriam Hospital Hospital · Providence, RI
  • Rhode Island Hospital Hospital · Providence, RI

Colleagues at Lifespan Physician Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1125 clinicians in the practice; 12 are shown here.

Other providers in Smithfield