IndividualActive
Mark Pirner, MD
NPI 1538439690 · Internal Medicine Physician · Newtown, CT
Mark Pirner, MD is a Internal Medicine Physician provider in Newtown, CT (NPI 1538439690).
Provider details
- NPI number
- 1538439690
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 52665 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(85/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
1 Stony Brook Rd
Newtown, CT 06470
Phone: (475) 323-7210
Street-level locationGet directions
Mailing address
1 Stony Brook Rd
Newtown, CT 06470-1017
Additional practice locations (1)
- 1 Stony Brook RdNewtown, CT 06470Phone: (475) 323-7210
Registry dates
- Enumerated
- 2012-01-06
- Last updated
- 2022-04-08
- Certified
- 2022-04-08
Frequently asked questions
- What is Mark Pirner's NPI number?
- Mark Pirner's National Provider Identifier (NPI) is 1538439690, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Pirner's specialty?
- Mark Pirner is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Pirner located?
- Mark Pirner's practice location on file with NPPES is 1 Stony Brook Rd, Newtown, CT 06470.
- What is Mark Pirner's phone number?
- The practice phone number listed in the NPPES registry for Mark Pirner is (475) 323-7210.
- Is Mark Pirner's NPI active?
- Yes — Mark Pirner's NPI (1538439690) is active in the NPPES registry as of the last update on 2022-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.