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JOYCE MICHELLE KOH M.D.
NPI 1144480484
Internal Medicine - Gastroenterology in Hermiston, OR

Active since June 10, 2008PECOS EnrolledAccepts Medicare Assignment
620 NW 11TH ST STE M206, HERMISTON, OR 97838(541) 667-3804(541) 667-0192 Get Directions Write a Review

NPPES record last updated: June 9, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 8, 2024, Oct 15, 2022 (2 updates tracked since 2022).

About Joyce Michelle Koh M.d. NPPES

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

JOYCE MICHELLE KOH M.D. (NPI 1144480484) is an individual gastroenterology provider in Hermiston, Oregon, licensed in Oregon (MD212643) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS, is affiliated with Bronson Methodist Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1144480484
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameJOYCE MICHELLE KOHCredential: M.D.
Location Address620 NW 11TH ST STE M206Hermiston, OR 97838-6941
Mailing AddressPo Box 18255Irvine, CA 92623-8255 · (410) 929-5569 · Fax (877) 929-2010
Phone(541) 667-3804
Fax(541) 667-0192
Sole ProprietorNo
Medical School CMSPennsylvania State University College Of MedicineGraduated 2008
Enumeration DateJune 10, 2008
Last NPPES UpdateJune 9, 20262 updates tracked since enumeration
NPPES CertifiedJune 9, 2026
✔ NPI 1144480484 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in OR · MD212643✔ Licensed in MD · D0074501✔ Licensed in MI · 4301510763
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
620 NW 11TH ST STE M206, Hermiston, OR 97838
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1601 John St Ste M-302Kalamazoo, MI 49007-5357 · Phone (269) 349-2266
Location 21342 NE Medical Center Dr Ste 100Bend, OR 97701-5918 · Phone (541) 706-5777

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Moda Health Plan, Inc. and more.Insurance ›

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

Joyce Michelle Koh 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.

PECOS PAC ID3971752635
PECOS Enrollment IDI20220819001289, I20231226001011
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

4

Medicare enrollment records show Joyce Koh reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Good Shepherd Health Care System
Same address
Critical Access
610 NW 11TH ST
Hermiston, OR 97838
  • Reassigned Medicare billing, Oregon enrollment
  • 344 clinicians in this Medicare group
NPI 1295789667 (541) 667-3400
Grays Harbor County Public Hospital District No. 1
207 mi
Rural Health
105 W SIMPSON AVE
Mccleary, WA 98557
  • Reassigned Medicare billing, Washington enrollment
  • 138 clinicians in this Medicare group
NPI 1255401683 (360) 346-2222
Bronson Methodist Hospital
1,684 mi
Hospitalist
601 JOHN STREET
Kalamazoo, MI 49007
  • Reassigned Medicare billing, Michigan enrollment
  • 1,133 clinicians in this Medicare group
NPI 1417961137 (269) 341-7654
Medstar Medical Group II LLC
2,187 mi
Critical Care Medicine
3800 RESERVOIR RD NW
Washington, DC 20007
  • Reassigned Medicare billing, District of Columbia enrollment
  • 3,530 clinicians in this Medicare group
NPI 1205562816 (703) 558-1403

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 3

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.

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
75 services75 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
48 services48 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
39 services39 patients

Hospital Affiliations CMS Care Compare 4

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

Bronson Methodist Hospital

Acute Care Hospitals · Kalamazoo, MI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230017
Location601 John StreetKalamazoo, MI 49007 · Kalamazoo County
Emergency services Birthing friendly

Bronson Lakeview Hospital

Critical Access Hospitals · Paw Paw, MI
OwnershipVoluntary non-profit - Private
CMS Certification Number231332
Location408 Hazen StreetPaw Paw, MI 49079 · Van Buren County
Emergency services

St Anthony Hospital

Critical Access Hospitals · Pendleton, OR
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number381319
Location2801 St Anthony WayPendleton, OR 97801 · Umatilla County
Emergency services Birthing friendly

Good Shepherd Medical Center

Critical Access Hospitals · Hermiston, OR
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number381325
Location610 NW 11th StreetHermiston, OR 97838 · Umatilla County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97838 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
$126.25 typical visit price
range $54.96 – $166.64
Typical copayment $31.56 (range $13.74 – $41.66)
Most-billed visit code 99204
Established Patient
$97.16 typical visit price
range $17.68 – $136.19
Typical copayment $24.29 (range $4.42 – $34.04)
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.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. GARRETT M POOL MD
Surgery
620 NW 11TH ST STE M206
HERMISTON, OR 97838
Umatilla County (541) 667-3804
ROBERT A WOHLMAN MD
Internal Medicine (Gastroenterology)
620 NW 11TH ST STE M206
HERMISTON, OR 97838
Umatilla County (541) 667-3804
MARQUES S JOHNSON MD
Surgery
620 NW 11TH ST STE M206
HERMISTON, OR 97838
Umatilla County (541) 667-3804
IVY NICOLE TUELLER PA
Physician Assistant (Surgical)
620 NW 11TH ST STE M206
HERMISTON, OR 97838
Umatilla County (541) 667-3804
CATHERINE SPOMER ARNP
Nurse Practitioner
620 NW 11TH ST STE M206
HERMISTON, OR 97838
Umatilla County (541) 667-3804

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 Joyce Koh's NPI number?

The NPI number for Joyce Koh is 1144480484. It was assigned to this individual provider in the NPPES registry on June 10, 2008.

Where is Joyce Koh located?

Joyce Koh practices at 620 NW 11th St Ste M206, Hermiston, OR 97838. The listed phone number is (541) 667-3804.

What is Joyce Koh's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Joyce Koh enrolled in Medicare?

Yes. Joyce Koh 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 Joyce Koh's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joyce Koh reassigns Medicare benefits to 4 organizations: Good Shepherd Health Care System (Hermiston, OR), Grays Harbor County Public Hospital District No. 1 (Mccleary, WA), Bronson Methodist Hospital (Kalamazoo, MI) and Medstar Medical Group II LLC (Washington, DC). 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 Joyce Koh's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Joyce Koh accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Moda Health Plan, Inc., PacificSource Health Plans and Premera Blue Cross Blue Shield of Alaska and 2 other insurers list Joyce Koh as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Joyce Koh affiliated with any hospitals?

According to CMS data, Joyce Koh is affiliated with Bronson Methodist Hospital, Bronson Lakeview Hospital, St Anthony Hospital and Good Shepherd Medical Center.

When was this NPI record last updated?

The NPPES record for Joyce Koh was last updated on June 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.