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

Dr. Timothy S. Loo, MD

Individual provider Internal Medicine Physician · NPI 1871584813

Dr. Timothy S. Loo, MD practises Internal Medicine in Boston, Massachusetts. Graduated from Johns Hopkins University School of Medicine in 1994, 32 years ago. Practices with Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc, a 1,676-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
32
Trained at
Johns Hopkins University School of Medicine
Licensed in
MA
In the registry since
2005
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

330 Brookline Ave Shapiro 6
Boston, MA 02215-5400 Not confirmed with CMS for 19 years — call before visiting
Phone: (617) 667-9600
Fax: (617) 667-8665
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 215918 (MA)

Record details

NPI number1871584813
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 31, 2005
Last updated in NPPESSeptember 6, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGERIATRIC MEDICINE
Medical schoolJOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1994 (32 years in practice)
Group practice Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc — 1676 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 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.

Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

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 patients397
Services billed 1,369 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Colleagues at Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1676 clinicians in the practice; 12 are shown here.

Other providers in Boston