JAEHYUN BYUN M.D.
NPI 1881824225
Family Medicine in Holyoke, MA
About Jaehyun Byun M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAEHYUN BYUN M.D. (NPI 1881824225) is an individual family medicine provider in Holyoke, Massachusetts, licensed in Massachusetts (265898) and active in the NPI registry since July 2009. He is enrolled in Medicare PECOS, is affiliated with Holyoke Medical Center, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2009).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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
Jaehyun Byun M.d. 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
6Medicare enrollment records show Jaehyun Byun reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Holyoke, MA 01040
- Reassigned Medicare billing, Massachusetts enrollment
- 337 clinicians in this Medicare group
Holyoke, MA 01040
- Reassigned Medicare billing, Massachusetts enrollment
- 241 clinicians in this Medicare group
Chicopee, MA 01020
- Reassigned Medicare billing, Massachusetts enrollment
- 242 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 173 clinicians in this Medicare group
Melrose, MA 02176
- Reassigned Medicare billing, Massachusetts enrollment
- 176 clinicians in this Medicare group
Ventura, CA 93003
- Reassigned Medicare billing, California enrollment
- 62 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 5
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.
Holyoke Medical Center
Acute Care Hospitals · Holyoke, MABaystate Medical Center
Acute Care Hospitals · Springfield, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01040 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.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 7
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
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 Jaehyun Byun's NPI number?
The NPI number for Jaehyun Byun is 1881824225. It was assigned to this individual provider in the NPPES registry on July 20, 2009. The provider is also known as Jimmy Byun.
Where is Jaehyun Byun located?
Jaehyun Byun practices at 230 Maple St, Holyoke, MA 01040. The listed phone number is (413) 420-2200.
What is Jaehyun Byun's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Jaehyun Byun enrolled in Medicare?
Yes. Jaehyun Byun 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 Jaehyun Byun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jaehyun Byun reassigns Medicare benefits to 6 organizations: Sound Physicians Of Massachusetts, Inc (Holyoke, MA), Holyoke Medical Center, Inc. (Holyoke, MA), Western Mass Physician Associates Inc (Chicopee, MA), Sound Physicians Of Massachusetts II PC (Brockton, MA), Massachusetts Acute Care Specialists PC (Melrose, MA) and 1 more organization, listed in the Medicare section above. 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 Jaehyun Byun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Jaehyun Byun affiliated with any hospitals?
According to CMS data, Jaehyun Byun is affiliated with Holyoke Medical Center and Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for Jaehyun Byun was last updated on August 17, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Jaehyun Byun, M.D. · NPI 1881824225
Family Medicine physician in Holyoke, Massachusetts. Individual provider, active in the CMS NPPES registry since July 20, 2009.
## Identity
- **NPI:** 1881824225 (Entity type: Individual)
- **Enumerated:** July 20, 2009
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 265898 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 230 MAPLE ST, Holyoke, MA 01040-5144
- **Phone:** (413) 420-2200
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Sound Physicians Of Massachusetts, Inc (NPI 1184178386, Holyoke, MA); Holyoke Medical Center, Inc. (NPI 1750395737, Holyoke, MA); Western Mass Physician Associates Inc (NPI 1205315793, Chicopee, MA); Sound Physicians Of Massachusetts II PC (NPI 1306376397, Brockton, MA); Massachusetts Acute Care Specialists PC (NPI 1306134812, Melrose, MA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2009
## Record status
- **NPPES last updated:** August 17, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1881824225) · Data from the CMS NPPES public registry.