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

Individual provider Anesthesiology Physician · NPI 1922089952

Dr. Rebecca J Leong, MD practises Anesthesiology in Wayland, Massachusetts. Graduated from Harvard Medical School in 1988, 38 years ago. Practices with Jjm Medical Services PC, a 38-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
38
Trained at
Harvard Medical School
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

22 Westway Rd
Wayland, MA 01778-2807 Not confirmed with CMS for 11 years — call before visiting
Phone: (508) 358-3432
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 71309 (MA)

Record details

NPI number1922089952
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 8, 2005
Last updated in NPPESNovember 24, 2014

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1988 (38 years in practice)
Group practice Jjm Medical Services Pc — 38 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients1,223
Services billed 1,343 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Colleagues at Jjm Medical Services PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 38 clinicians in the practice; 12 are shown here.

Other providers in Wayland