EUN SUN LEE I MD
NPI 1962854521
Internal Medicine - Infectious Disease in Hartford, CT
About Eun Sun Lee I Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EUN SUN LEE I MD (NPI 1962854521) is an individual infectious disease provider in Hartford, Connecticut, licensed in Connecticut (070751) and active in the NPI registry since July 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Eun Sun Lee I Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Eun Sun Lee reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- 1,921 clinicians in this Medicare group
Hartford, CT 06102
- Reassigned Medicare billing, Connecticut enrollment
- 1,333 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06106 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Eun Sun Lee's NPI number?
The NPI number for Eun Sun Lee is 1962854521. It was assigned to this individual provider in the NPPES registry on July 7, 2016. The provider is also known as Eunsun Lee MD.
Where is Eun Sun Lee located?
Eun Sun Lee practices at 132 Jefferson Street, 3rd Floor Hartford Hospital Infectious Diseases, Hartford, CT 06106. The listed phone number is (860) 972-9300.
What is Eun Sun Lee's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Eun Sun Lee enrolled in Medicare?
Yes. Eun Sun Lee is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Eun Sun Lee's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Eun Sun Lee reassigns Medicare benefits to 2 organizations: Hartford Healthcare Medical Group Specialists, PLLC (Hartford, CT) and Hartford Hospital (Hartford, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Eun Sun Lee's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Eun Sun Lee accept?
Health plans from Anthem Blue Cross and Blue Shield list Eun Sun Lee as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Eun Sun Lee was last updated on June 9, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Eun Sun Lee I, MD · NPI 1962854521
Infectious Disease physician in Hartford, Connecticut. Individual provider, active in the CMS NPPES registry since July 7, 2016.
## Identity
- **NPI:** 1962854521 (Entity type: Individual)
- **Enumerated:** July 7, 2016
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 070751 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 132 JEFFERSON STREET, 3RD FLOOR, HARTFORD HOSPITAL INFECTIOUS DISEASES, Hartford, CT 06106-2429
- **Phone:** (860) 972-9300
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Hartford Healthcare Medical Group Specialists, PLLC (NPI 1023584216, Hartford, CT); Hartford Hospital (NPI 1770696643, Hartford, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** June 9, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1962854521) · Data from the CMS NPPES public registry.