DR. MICHAEL Y CHOI MD
NPI 1922083344
Internal Medicine - Gastroenterology in Worcester, MA
About Dr. Michael Y Choi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL Y CHOI MD (NPI 1922083344) is an individual gastroenterology provider in Worcester, Massachusetts, licensed in Massachusetts (217235) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Mid Coast Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Other Identifiers 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
Dr. Michael Y Choi 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
3Medicare enrollment records show Michael Choi reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Worcester, MA 01655
- Reassigned Medicare billing, Massachusetts enrollment
- 2,902 clinicians in this Medicare group
Exeter, NH 03833
- Reassigned Medicare billing, New Hampshire enrollment
- 395 clinicians in this Medicare group
Biddeford, ME 04005
- Reassigned Medicare billing, Maine enrollment
- 3,140 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
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mid Coast Hospital
Acute Care Hospitals · Brunswick, MEExeter Hospital Inc
Acute Care Hospitals · Exeter, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01605 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.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Michael Choi's NPI number?
The NPI number for Michael Choi is 1922083344. It was assigned to this individual provider in the NPPES registry on December 8, 2005.
Where is Michael Choi located?
Michael Choi practices at 21 Eastern Ave, Worcester, MA 01605. The listed phone number is (508) 334-8419.
What is Michael Choi's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Michael Choi enrolled in Medicare?
Yes. Michael Choi 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 Michael Choi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Choi reassigns Medicare benefits to 3 organizations: Umass Memorial Medical Group Inc (Worcester, MA), Core Physicians, LLC (Exeter, NH) and Mainehealth (Biddeford, ME). 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 Michael Choi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Choi accept?
Health plans from Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care, Oscar Health, Taro Health and WellSense Health Plan list Michael Choi 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.
Is Michael Choi affiliated with any hospitals?
According to CMS data, Michael Choi is affiliated with Mid Coast Hospital and Exeter Hospital Inc.
When was this NPI record last updated?
The NPPES record for Michael Choi was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.
# Dr. Michael Y Choi, MD · NPI 1922083344
Gastroenterology physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since December 8, 2005.
## Identity
- **NPI:** 1922083344 (Entity type: Individual)
- **Enumerated:** December 8, 2005
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 217235 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 21 EASTERN AVE, Worcester, MA 01605-3094
- **Phone:** (508) 334-8419
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Umass Memorial Medical Group Inc (NPI 1760445373, Worcester, MA); Core Physicians, LLC (NPI 1336330588, Exeter, NH); Mainehealth (NPI 1215417019, Biddeford, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1998
## Record status
- **NPPES last updated:** June 24, 2026
- **Other identifiers:** Medicaid 110034766A (MA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1922083344) · Data from the CMS NPPES public registry.