IndividualActive
Nancy Holyst, M.D.
NPI 1861428658 · Pediatrics Physician · Plainville, CT
Nancy Holyst, M.D. is a Pediatrics Physician provider in Plainville, CT (NPI 1861428658).
Provider details
- NPI number
- 1861428658
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 031851 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
21 Cooke St
Plainville, CT 06062-1801
Phone: (860) 747-9400
Fax: (860) 747-9499
Street-level locationGet directions
Mailing address
Po Box 7057
Plainville, CT 06062-7057
Registry dates
- Enumerated
- 2006-06-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Nancy Holyst's NPI number?
- Nancy Holyst's National Provider Identifier (NPI) is 1861428658, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Holyst's specialty?
- Nancy Holyst is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Holyst located?
- Nancy Holyst's practice location on file with NPPES is 21 Cooke St, Plainville, CT 06062-1801.
- What is Nancy Holyst's phone number?
- The practice phone number listed in the NPPES registry for Nancy Holyst is (860) 747-9400.
- Is Nancy Holyst's NPI active?
- Yes — Nancy Holyst's NPI (1861428658) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.