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

Michael Jonathan Older, MD

Individual provider Gastroenterology Physician · NPI 1194757625

Michael Jonathan Older, MD is an Internal Medicine in Ayer, Massachusetts. Graduated from Tufts University School of Medicine in 1988, 38 years ago. Practices with Lifespan Physician Group of Massachusetts Inc, a 457-clinician group. Licensed in Massachusetts.

Years since qualifying
38
Trained at
Tufts University School of Medicine
Licensed in
MA
In the registry since
2006
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

190 Groton Rd Ste 190
Ayer, MA 01432-1124
Phone: (978) 772-3547
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 71640 (MA)

Record details

NPI number1194757625
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 7, 2006
Last updated in NPPESJanuary 29, 2014
Mailing address190 Groton Rd, Suite 190, Ayer, MA 01432-1124

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGASTROENTEROLOGY
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Lifespan Physician Group Of Massachusetts Inc — 457 clinicians
Accepts Medicare assignment Not indicated

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