SIEW M WONG M.D.
NPI 1336387356
Internal Medicine - Gastroenterology in Kennewick, WA

Q: What is Siew Wong's NPI number?

The NPI number for Siew Wong is 1336387356. It was assigned to this individual provider in the NPPES registry on January 29, 2009.

Q: What is Siew Wong's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Siew Wong was last updated on October 14, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since January 29, 2009PECOS EnrolledAccepts Medicare Assignment

84.76/100

CMS Quality Rating

8819 W VICTORIA AVE STE 130, KENNEWICK, WA 99336(509) 460-5500(509) 460-5111 Get Directions Write a Review

NPPES record last updated: October 14, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Siew M Wong M.d. NPPES

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

SIEW M WONG M.D. (NPI 1336387356) is an individual gastroenterology provider in Kennewick, Washington, licensed in Washington (MD60223678) and active in the NPI registry since January 2009. She is enrolled in Medicare PECOS, is affiliated with Providence St Mary Medical Center, and is a graduate of Other (2002).

NPPES Registry Identity

NPI1336387356

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameSIEW M WONGCredential: M.D.

Location Address8819 W VICTORIA AVE STE 130Kennewick, WA 99336-7193

Mailing Address3900 S Zintel WayKennewick, WA 99338 · (509) 942-3627 · Fax (509) 942-2268

Phone(509) 460-5500

Fax(509) 460-5111

Sole ProprietorNo

Medical School CMSOtherGraduated 2002

Enumeration DateJanuary 29, 2009

Last NPPES UpdateOctober 14, 2022

NPPES CertifiedOctober 14, 2022

✔ NPI 1336387356 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in WA · MD60223678

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.

8819 W VICTORIA AVE STE 130, Kennewick, WA 99336

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Moda Health Plan, Inc., Premera Blue Cross Blue Shield of Alaska 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

Siew M Wong 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 ID648328344

PECOS Enrollment IDI20110913000143

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 Siew Wong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Tri-Cities Digestive Health Center, Ps

4.3 mi

Endoscopy

8819 W VICTORIA AVE
Kennewick, WA 99336

Reassigned Medicare billing, Washington enrollment
Medicare enrollment name: Tri-Cities Digestive Health Center, P.S.
16 clinicians in this Medicare group

NPI 1003987868 (509) 460-5500

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 14

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

480 services254 patients

Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500

Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.

232 services196 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

164 services164 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.

155 services154 patients

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.

152 services152 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

140 services123 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

89 services89 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

83 services70 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.

73 services73 patients

Insertion of guide wire with dilation of esophagus using a flexible endoscope 43248

This is a procedure where a thin tube, called an endoscope, is gently passed through your mouth into your esophagus. A guide wire is then inserted to help widen any narrow areas. This helps improve swallowing and reduce discomfort.

38 services37 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

34 services34 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

27 services26 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

15 services15 patients

New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Providence St Mary Medical Center

Acute Care Hospitals · Walla Walla, WA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number500002

Location401 W Poplar StWalla Walla, WA 99362 · Walla Walla County

Emergency services Birthing friendly

Kadlec Regional Medical Center

Acute Care Hospitals · Richland, WA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number500058

Location888 Swift BlvdRichland, WA 99352 · Benton County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 99336 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

$130.99 typical visit price

range $57.27 – $172.80

Typical copayment $32.74 (range $14.31 – $43.20)

Most-billed visit code 99204

Established Patient

$100.78 typical visit price

range $18.56 – $141.11

Typical copayment $25.19 (range $4.64 – $35.27)

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.

84.76/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

92.58

Improvement Activities

Cost

59.09

Reported Quality Measures

Advance Care Plan

100%428 patients5/55-star benchmark: 100%

Colorectal Cancer Screening

100%614 patients5/55-star benchmark: 100%

Documentation of Current Medications in the Medical Record

99%1,217 patients4/55-star benchmark: 100%

Falls: Screening for Future Fall Risk

100%410 patients5/55-star benchmark: 100%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

100%978 patients5/55-star benchmark: 100%

Use of High-Risk Medications in Older Adults

Lower rates are better for this measure.

Patients appropriateDiagnosis: 0% · 436 patients

Patients totalRate: 1% · 436 patients

1%436 patients4/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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 Siew Wong's NPI number?

The NPI number for Siew Wong is 1336387356. It was assigned to this individual provider in the NPPES registry on January 29, 2009.

Where is Siew Wong located?

Siew Wong practices at 8819 W Victoria Ave Ste 130, Kennewick, WA 99336. The listed phone number is (509) 460-5500.

What is Siew Wong's specialty?

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

Is Siew Wong enrolled in Medicare?

Yes. Siew Wong 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 Siew Wong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Siew Wong reassigns Medicare benefits to Tri-Cities Digestive Health Center, Ps (Kennewick, WA). 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 Siew Wong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Siew Wong accept?

Health plans from Ambetter Health, Moda Health Plan, Inc., Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Siew Wong 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 Siew Wong affiliated with any hospitals?

According to CMS data, Siew Wong is affiliated with Providence St Mary Medical Center and Kadlec Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Siew Wong was last updated on October 14, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.