Gregory Seidel, MD
NPI 1437138757 · Dermatopathology (Pathology) Physician · Portsmouth, NH
Gregory Seidel, MD is a Dermatopathology (Pathology) Physician provider in Portsmouth, NH (NPI 1437138757).
Provider details
- NPI number
- 1437138757
- Entity type
- Individual
- Primary specialty
- Dermatopathology (Pathology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 14900 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-01-13
- Last updated
- 2018-12-03
Frequently asked questions
- What is Gregory Seidel's NPI number?
- Gregory Seidel's National Provider Identifier (NPI) is 1437138757, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Seidel's specialty?
- Gregory Seidel is listed in the NPPES registry with a primary specialty of Dermatopathology (Pathology) Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Seidel located?
- Gregory Seidel's practice location on file with NPPES is 155 Borthwick Ave, Portsmouth, NH 03801-7156.
- What is Gregory Seidel's phone number?
- The practice phone number listed in the NPPES registry for Gregory Seidel is (978) 691-5690.
- Is Gregory Seidel's NPI active?
- Yes — Gregory Seidel's NPI (1437138757) is active in the NPPES registry as of the last update on 2018-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.