Mariusz Olesiak, PA-C
NPI 1417204496 · Physician Assistant · Boston, MA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariusz Olesiak, PA-C is a Physician Assistant provider in Boston, MA (NPI 1417204496).
Provider details
- NPI number
- 1417204496
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- PA4408 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-08-09
- Last updated
- 2015-03-04
Frequently asked questions
- What is Mariusz Olesiak's NPI number?
- Mariusz Olesiak's National Provider Identifier (NPI) is 1417204496, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariusz Olesiak's specialty?
- Mariusz Olesiak is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mariusz Olesiak located?
- Mariusz Olesiak's practice location on file with NPPES is 725 Albany St, Boston, MA 02118.
- What is Mariusz Olesiak's phone number?
- The practice phone number listed in the NPPES registry for Mariusz Olesiak is (617) 638-6287.
- Does Mariusz Olesiak accept Medicare?
- Mariusz Olesiak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariusz Olesiak's NPI active?
- Yes — Mariusz Olesiak's NPI (1417204496) is active in the NPPES registry as of the last update on 2015-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.