Eun Kwang Byun, MD
Specialist · Fountain Valley, CA
Eun Kwang Byun, MD is a specialist with a practice address in Fountain Valley, California, and NPI 1861683047, issued on Aug 5, 2007. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Eun Kwang Byun
- Credential
- MD
- Primary taxonomy
- Specialist 174400000X
- License number
- 25MA09225700 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 10419 Slater Ave Apt 107, Fountain Valley, CA 92708
- Phone
- (646) 717-2533
- Enumerated
- Aug 5, 2007
- Record last updated
- Jan 12, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicaid ID
- 0356557 NJ
- Medicare enrollment
- Enrolled (PECOS I20151006001616); accepts Medicare assignment
- Entity
- Type 1 · individual
Verify Eun Kwang Byun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average specialist in 2024
596 Medicare Part D claims for 144 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 342 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen120 claims
- Tramadol Hcl99 claims
- Gabapentin61 claims
- Pregabalin59 claims
- Baclofen48 claims
- Oxycodone-Acetaminophen41 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $9,102.62
32 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Integrative Sports And Spine IncArtesia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
34 specialist records list a practice address in Fountain Valley
They are 34 of the 2,190 NPPES records with a practice address in Fountain Valley, and 5,749 specialist records in California.
All 34 in Fountain Valley → All 5,749 in California → Every provider in Fountain Valley →
Other specialist records in California
- Fatemeh Abbasi, PTVan Nuys, CA1558496760
- Erlinda Abcede, M.D.Cudahy, CA1831228675
- Maher Abdallah, M.D.Palm Springs, CA1205988011
- Farinaz AbdiSan Marcos, CA1063153963
- Mai Abe, LESanta Monica, CA1609405158
- Hamid Abedi, HEARING AID SPECIALISan Diego, CA1659410744
- Jonas AbellaSan Francisco, CA1679760938
- Shreedhar Abhyankar, M.D.Indio, CA1861530669
- Elaine AbichRiverside, CA1780458927
- Mussarat Abidi, MDLadera Ranch, CA1053307769
Common questions
What is Eun Kwang Byun, MD's NPI number?
Eun Kwang Byun, MD's National Provider Identifier (NPI) is 1861683047, issued on Aug 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Eun Kwang Byun, MD located?
The NPPES record lists a practice address at 10419 Slater Ave Apt 107, Fountain Valley, CA, 92708. Phone: (646) 717-2533. Providers update this record themselves, so call before visiting.
How can I verify Eun Kwang Byun, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Eun Kwang Byun, MD prescribe under Medicare Part D?
In 2024, Eun Kwang Byun, MD had 596 Medicare Part D claims for 144 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Eun Kwang Byun, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.