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

Peter Mark Grzesik, DO

Individual provider Anesthesiology Physician · NPI 1518378231

Peter Mark Grzesik, DO is an Anesthesiology in Worcester, Massachusetts. Graduated from New York College of Osteo Medicine of New York Institute of Technology in 2014, 12 years ago. Practices with Umass Memorial Medical Group Inc, a 2,467-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
12
Trained at
New York College of Osteo Medicine of New York Institute of Technology
Licensed in
MA
In the registry since
2014
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

55 Lake Ave N
Worcester, MA 01655-0002
Phone: (508) 334-3271
Fax: (508) 856-5911
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 24 Hospital Ave, Danbury, CT 06810-6099 — (203) 739-7000
  • 20 York St, New Haven, CT 06510-3220 — (203) 688-4242

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 287786 (MA)

Record details

NPI number1518378231
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 15, 2014
Last updated in NPPESJuly 29, 2021
Certification dateJuly 29, 2021
Mailing addressPo Box 415348, Boston, MA 02241-5348

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolNEW YORK COLLEGE OF OSTEO MEDICINE OF NEW YORK INSTITUTE OF TECHNOLOGY
Graduated 2014 (12 years in practice)
Group practice Umass Memorial Medical Group Inc — 2467 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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