Jaehyun Byun, M.D.
NPI 1881824225 · Family Medicine Physician · Holyoke, MA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jaehyun Byun, M.D. is a Family Medicine Physician provider in Holyoke, MA (NPI 1881824225).
Provider details
- NPI number
- 1881824225
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 265898 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
548 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 347 | $78 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 117 | $113 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 33 | $54 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 32 | $117 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 19 | $171 |
Typical Medicare-allowed amounts for these services range $54–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 45 | 13 |
| Prednisone | 26 | 25 |
| Ertapenem Sodiumbrand: Ertapenem | 23 | — |
| Cefuroxime Axetilbrand: Cefuroxime | 17 | 17 |
| Furosemide | 16 | 15 |
| Doxycycline Monohydrate | 15 | 15 |
| Amlodipine Besylate | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-07-20
- Last updated
- 2016-08-17
Frequently asked questions
- What is Jaehyun Byun's NPI number?
- Jaehyun Byun's National Provider Identifier (NPI) is 1881824225, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jaehyun Byun's specialty?
- Jaehyun Byun is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jaehyun Byun located?
- Jaehyun Byun's practice location on file with NPPES is 230 Maple St, Holyoke, MA 01040-5144.
- What is Jaehyun Byun's phone number?
- The practice phone number listed in the NPPES registry for Jaehyun Byun is (413) 420-2200.
- Does Jaehyun Byun accept Medicare?
- Jaehyun Byun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jaehyun Byun's NPI active?
- Yes — Jaehyun Byun's NPI (1881824225) is active in the NPPES registry as of the last update on 2016-08-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.