OrganizationActive
J. Andrew Hallberg, MD, LLC
NPI 1487770228 · Specialist · Mystic, CT
Provider details
- NPI number
- 1487770228
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- John Hallberg, Owner(860) 536-0773
- License
- 029044 (CT)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(89/100 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
56 Whitehall Ave
Suite a
Mystic, CT 06355-1967
Phone: (860) 536-0773
Fax: (860) 536-1068
Street-level locationGet directions
Mailing address
56 Whitehall Ave
Mystic, CT 06355-1967
Registry dates
- Enumerated
- 2007-03-22
- Last updated
- 2020-08-22
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.