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DR. EUN KWANG BYUN MD
NPI 1861683047
Specialist in Fountain Valley, CA

Active since August 05, 2007PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
10419 SLATER AVE APT 107, FOUNTAIN VALLEY, CA 92708(646) 717-2533 Get Directions Write a Review

NPPES record last updated: January 12, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Eun Kwang Byun Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. EUN KWANG BYUN MD (NPI 1861683047) is an individual specialist in Fountain Valley, California, licensed in New Jersey (25MA09225700) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2000).

NPPES Registry Identity

NPI1861683047
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. EUN KWANG BYUNCredential: MD
Location Address10419 SLATER AVE APT 107Fountain Valley, CA 92708-7704
Mailing Address10419 Slater Ave Apt 107Fountain Valley, CA 92708-7704 · (646) 717-2533
Phone(646) 717-2533
Sole ProprietorNo
Medical School CMSOtherGraduated 2000
Enumeration DateAugust 5, 2007
Last NPPES UpdateJanuary 12, 2017
✔ NPI 1861683047 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in NJ · 25MA09225700
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
10419 SLATER AVE APT 107, Fountain Valley, CA 92708
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Other Identifiers 1

Medicaid0356557NJ

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. Eun Kwang Byun 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.

PECOS PAC ID8325280118
PECOS Enrollment IDI20151006001616
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Eun Byun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Integrative Sports And Spine Inc
13 mi
Pain Medicine
9080 IRVINE CENTER DR
Irvine, CA 92618
  • Reassigned Medicare billing, California enrollment
  • 70 clinicians in this Medicare group
NPI 1245630557 (949) 540-5641

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.

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
2,794 services293 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
1,803 services189 patients
Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306
An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.
246 services200 patients
Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes 99305
An initial nursing facility visit per day is a service where a healthcare professional spends about 35 minutes assessing a patient's health status. This includes reviewing medical history, conducting a physical exam, and developing a care plan based on the patient's needs.
44 services42 patients

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.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored

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 Byun's NPI number?

The NPI number for Eun Byun is 1861683047. It was assigned to this individual provider in the NPPES registry on August 5, 2007.

Where is Eun Byun located?

Eun Byun practices at 10419 Slater Ave Apt 107, Fountain Valley, CA 92708. The listed phone number is (646) 717-2533.

What is Eun Byun's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Eun Byun enrolled in Medicare?

Yes. Eun 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 organization bills Medicare for Eun Byun's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Eun Byun reassigns Medicare benefits to Integrative Sports And Spine Inc (Irvine, CA). The 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 Byun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Eun Byun was last updated on January 12, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.