Michael Grunstein
NPI 1255909941 · Student in an Organized Health Care Education/Training Program · New Haven, CT
Enrolled with Medicare as Order and Referring Only - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Grunstein is a Student in an Organized Health Care Education/Training Program provider in New Haven, CT (NPI 1255909941).
Provider details
- NPI number
- 1255909941
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
3 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
Mailing address
Additional practice locations (2)
- 300 Community DrManhasset, NY 11030-3816Phone: (516) 562-0100
- 707 E. Main Medical CenterMiddletown, NY 10940Phone: (453) 337-3738
Registry dates
- Enumerated
- 2021-06-17
- Last updated
- 2025-08-20
- Certified
- 2025-08-20
Frequently asked questions
- What is Michael Grunstein's NPI number?
- Michael Grunstein's National Provider Identifier (NPI) is 1255909941, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Grunstein's specialty?
- Michael Grunstein is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Michael Grunstein located?
- Michael Grunstein's practice location on file with NPPES is 20 York St, New Haven, CT 06510-3220.
- What is Michael Grunstein's phone number?
- The practice phone number listed in the NPPES registry for Michael Grunstein is (203) 688-4242.
- Does Michael Grunstein accept Medicare?
- Michael Grunstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Grunstein's NPI active?
- Yes — Michael Grunstein's NPI (1255909941) is active in the NPPES registry as of the last update on 2025-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.