Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Daniel Leonard Regan, MD

Individual provider Addiction Medicine (Family Medicine) Physician · NPI 1972619864

Dr. Daniel Leonard Regan, MD is an Addiction Medicine in Johnston, Rhode Island. Qualified in 1976, 50 years ago. Practices with Atmed Treatment Center, Inc, an 11-clinician group. Licensed in Rhode Island.

Years since qualifying
50
Licensed in
RI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1526 Atwood Ave Ste 100
Johnston, RI 02919
Phone: (401) 273-9400
Fax: (401) 273-2339
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence RI6534 (RI)
Addiction Medicine (Family Medicine) Physician Taxonomy 207QA0401X · Licence MD06534 (RI)

Record details

NPI number1972619864
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 22, 2006
Last updated in NPPESMarch 23, 2018

Medicare enrollment

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

Medicare specialtyADDICTION MEDICINE
Medical schoolOTHER
Graduated 1976 (50 years in practice)
Group practice Atmed Treatment Center, Inc. — 11 clinicians
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare