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

Dr. Siddhartha Y Parker, MD

Individual provider Gastroenterology Physician · NPI 1417117532

Dr. Siddhartha Y Parker, MD practises Gastroenterology in Lebanon, New Hampshire. Graduated from Tufts University School of Medicine in 2008, 18 years ago. Practices with Dartmouth-Hitchcock Clinic, a 1,430-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New Hampshire.

Years since qualifying
18
Trained at
Tufts University School of Medicine
Licensed in
NH
In the registry since
2008
Specialties on file
3
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

1 Medical Center Dr Dhmc Dept OF Gastroenterology
Lebanon, NH 03756-1000 Not confirmed with CMS for 10 years — call before visiting
Phone: (603) 650-5261
Fax: (603) 650-5225
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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 16649 (NH)
Hospitalist Physician Taxonomy 208M00000X · Licence 16649 (NH)
Internal Medicine Physician Taxonomy 207R00000X · Licence 16649 (NH)

Record details

NPI number1417117532
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 12, 2008
Last updated in NPPESMay 2, 2016

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2008 (18 years in practice)
Group practice Dartmouth-Hitchcock Clinic — 1430 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 143 times · 88th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 156 times · 86th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients339
Services billed 702 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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.

Colleagues at Dartmouth-Hitchcock Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1430 clinicians in the practice; 12 are shown here.

Other providers in Lebanon