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

Jonathan Mazer, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1902288194

Jonathan Mazer, MD is an Anesthesiology in Boston, Massachusetts. Qualified in 2015, 11 years ago. Practices with Rwjbh Observation Associates LLC, a 971-clinician group and accepts Medicare assignment. Licensed in Massachusetts and New Jersey.

Years since qualifying
11
Licensed in
MA, NJ
In the registry since
2015
Specialties on file
2
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

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Boston, MA

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 25MA10401500 (NJ)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 263741 (MA)

Record details

NPI number1902288194
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 24, 2015
Last updated in NPPESMay 22, 2019

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Rwjbh Observation Associates Llc — 971 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Other providers in Boston