Peter Grzesik, DO
NPI 1518378231 · Anesthesiology Physician · Worcester, MA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Grzesik, DO is a Anesthesiology Physician provider in Worcester, MA (NPI 1518378231).
Provider details
- NPI number
- 1518378231
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 287786 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
325 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Daily Hospital Management of Continuous Spinal Drug Administration01996 | 48 | $62 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 46 | $13 |
| Other Procedure on Nervous System64999 | 38 | $58 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 33 | $82 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 33 | $43 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 29 | $117 |
Practice location
Mailing address
Additional practice locations (2)
- 24 Hospital AveDanbury, CT 06810-6099Phone: (203) 739-7000
- 20 York StNew Haven, CT 06510-3220Phone: (203) 688-4242
Registry dates
- Enumerated
- 2014-05-15
- Last updated
- 2021-07-29
- Certified
- 2021-07-29
Frequently asked questions
- What is Peter Grzesik's NPI number?
- Peter Grzesik's National Provider Identifier (NPI) is 1518378231, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Grzesik's specialty?
- Peter Grzesik is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Grzesik located?
- Peter Grzesik's practice location on file with NPPES is 55 Lake Ave N, Worcester, MA 01655-0002.
- What is Peter Grzesik's phone number?
- The practice phone number listed in the NPPES registry for Peter Grzesik is (508) 334-3271.
- Does Peter Grzesik accept Medicare?
- Peter Grzesik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Grzesik's NPI active?
- Yes — Peter Grzesik's NPI (1518378231) is active in the NPPES registry as of the last update on 2021-07-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.