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

Leah D. Creahan, MD

Individual provider Gastroenterology Physician · NPI 1629500921

Leah D. Creahan, MD is a Gastroenterology in Acton, Massachusetts. Graduated from University of Massachusetts Medical School in 2017, 9 years ago. Practices with Hallmark Health Medical Associates Inc, a 149-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
9
Trained at
University of Massachusetts Medical School
Licensed in
MA
In the registry since
2017
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

45B Discovery Way
Acton, MA 01720-4482
Phone: (978) 429-2010
Fax: (978) 264-1936
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 282807 (MA)

Record details

NPI number1629500921
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 28, 2017
Last updated in NPPESJune 16, 2025
Certification dateJune 16, 2025
Mailing address299 Lexington St Unit 4, Woburn, MA 01801-5995

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 2017 (9 years in practice)
Group practice Hallmark Health Medical Associates Inc — 149 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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