1. Home
  2. Directory
  3. Oregon
  4. Portland
  5. Internal Medicine
  6. NPI Profile

MYUNG SUN CHOI MD
NPI 1538520440
Internal Medicine in Portland, OR

Active since March 19, 2016PECOS EnrolledAccepts Medicare Assignment
95.19/100
CMS Quality Rating
9205 SW BARNES RD, PORTLAND, OR 97225(503) 216-2906 Get Directions Write a Review

NPPES record last updated: February 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 1, 2022, May 13, 2021, Aug 1, 2019 and 5 more (8 updates tracked since 2016).

About Myung Sun Choi Md NPPES

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

MYUNG SUN CHOI MD (NPI 1538520440) is an individual internal medicine provider in Portland, Oregon, licensed in Oregon (MD228180) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS, is affiliated with United Memorial Medical Center, and is a graduate of University Of Pittsburgh School Of Medicine (2016).

NPPES Registry Identity

NPI1538520440
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMYUNG SUN CHOICredential: MD
Location Address9205 SW BARNES RDPortland, OR 97225-6603
Mailing Address9205 Sw Barnes RdPortland, OR 97225-6603 · (503) 216-2906
Phone(503) 216-2906
Sole ProprietorNo
Medical School CMSUniversity Of Pittsburgh School Of MedicineGraduated 2016
Enumeration DateMarch 19, 2016
Last NPPES UpdateFebruary 24, 20268 updates tracked since enumeration
NPPES CertifiedFebruary 24, 2026
✔ NPI 1538520440 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in OR · MD228180
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License 297993 (NY)
9205 SW BARNES RD, Portland, OR 97225
Open in Google Maps ↗

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

Myung Sun 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.

PECOS PAC ID2961798152
PECOS Enrollment IDI20190708002350, I20260218002943
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 Reassignments

5

Medicare enrollment records show Myung Sun Choi reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Health & Services Oregon
Same address
Primary Care
9205 SW BARNES RD, MT7878
Portland, OR 97225
  • Reassigned Medicare billing, Oregon enrollment
  • 1,501 clinicians in this Medicare group
NPI 1053403394 (503) 216-4961
United Memorial Medical Center
2,191 mi
Hematology & Oncology
127 NORTH ST, SECOND FLOOR
Batavia, NY 14020
  • Reassigned Medicare billing, New York enrollment
  • 782 clinicians in this Medicare group
NPI 1508260704 (585) 344-5252
Rochester General Hospital
2,210 mi
Family Medicine
2350 RIDGEWAY AVE
Rochester, NY 14626
  • Reassigned Medicare billing, New York enrollment
  • 2,285 clinicians in this Medicare group
NPI 1356412712 (585) 922-3150
Newark Wayne Community Hospital
2,241 mi
General Acute Care Hospital
1200 DRIVING PARK AVE
Newark, NY 14513
  • Reassigned Medicare billing, New York enrollment
  • 679 clinicians in this Medicare group
NPI 1346369212 (315) 332-2022
Clifton Springs Sanitarium Co
2,241 mi
General Acute Care Hospital
2 COULTER RD
Clifton Springs, NY 14432
  • Reassigned Medicare billing, New York enrollment
  • 872 clinicians in this Medicare group
NPI 1366505463 (315) 462-9561

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 hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
261 services107 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
88 services61 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
36 services36 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
18 services18 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

United Memorial Medical Center

Acute Care Hospitals · Batavia, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330073
Location127 North StreetBatavia, NY 14020 · Genesee County
Emergency services Birthing friendly

Rochester General Hospital

Acute Care Hospitals · Rochester, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330125
Location1425 Portland AvenueRochester, NY 14621 · Monroe County
Emergency services Birthing friendly

Providence St Vincent Medical Center

Acute Care Hospitals · Portland, OR
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number380004
Location9205 SW Barnes RoadPortland, OR 97225 · Washington County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97225 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$134.16 typical visit price
range $58.99 – $176.88
Typical copayment $33.54 (range $14.74 – $44.22)
Most-billed visit code 99204
Established Patient
$103.51 typical visit price
range $19.32 – $144.79
Typical copayment $25.87 (range $4.83 – $36.19)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

95.19/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality70.62
Promoting Interoperability100
Improvement Activities40

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.

DR. VICTOR NGUYEN PHAM M.D.
Hospitalist
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (503) 216-2906
YEVGENY BULOCHNIK PHARMD
Pharmacist
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (503) 216-3299
MR. DANIEL PAUL ADDY C.R.N.A.
Nurse Anesthetist, Certified Registered
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (503) 216-1234
MR. JONATHAN DAVID CAULLEY PT
Physical Therapist
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (503) 216-2610
EMILY ECHTENKAMP LCSW, CADC III, MAC
Counselor (Mental Health)
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (503) 216-1234
BRIAN J KEARNS MD
Hospitalist
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (503) 216-2906
DR. JAMES S PUTNAM MD
Radiology (Vascular & Interventional Radiology)
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (503) 216-4830
MATTHEW CARSTENS FRANK M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
9205 SW BARNES RD
PORTLAND, OR 97225
Washington County (303) 859-4275

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 Myung Sun Choi's NPI number?

The NPI number for Myung Sun Choi is 1538520440. It was assigned to this individual provider in the NPPES registry on March 19, 2016.

Where is Myung Sun Choi located?

Myung Sun Choi practices at 9205 SW Barnes Rd, Portland, OR 97225. The listed phone number is (503) 216-2906.

What is Myung Sun Choi's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Myung Sun Choi enrolled in Medicare?

Yes. Myung Sun 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 Myung Sun Choi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Myung Sun Choi reassigns Medicare benefits to 5 organizations: Providence Health & Services Oregon (Portland, OR), United Memorial Medical Center (Batavia, NY), Rochester General Hospital (Rochester, NY), Newark Wayne Community Hospital (Newark, NY) and Clifton Springs Sanitarium Co (Clifton Springs, NY). 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 Myung Sun Choi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Myung Sun Choi affiliated with any hospitals?

According to CMS data, Myung Sun Choi is affiliated with United Memorial Medical Center, Rochester General Hospital and Providence St Vincent Medical Center.

When was this NPI record last updated?

The NPPES record for Myung Sun Choi was last updated on February 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.