Lewis Portnoy, MD
NPI 1841557949 · Anatomic Pathology & Clinical Pathology Physician · Westport, CT
Lewis Portnoy, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Westport, CT (NPI 1841557949).
Provider details
- NPI number
- 1841557949
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 12993 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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
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
- 2012-04-13
- Last updated
- 2012-04-13
Frequently asked questions
- What is Lewis Portnoy's NPI number?
- Lewis Portnoy's National Provider Identifier (NPI) is 1841557949, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lewis Portnoy's specialty?
- Lewis Portnoy is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Lewis Portnoy located?
- Lewis Portnoy's practice location on file with NPPES is 10 Linda Ln, Westport, CT 06880-3945.
- What is Lewis Portnoy's phone number?
- The practice phone number listed in the NPPES registry for Lewis Portnoy is (203) 222-7326.
- Is Lewis Portnoy's NPI active?
- Yes — Lewis Portnoy's NPI (1841557949) is active in the NPPES registry as of the last update on 2012-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.