DR. TIEN SY DONG M.D., PH.D.
NPI 1730443177
Internal Medicine - Gastroenterology in Portland, OR

Q: What is Tien Dong's NPI number?

The NPI number for Tien Dong is 1730443177. It was assigned to this individual provider in the NPPES registry on June 29, 2012.

Q: What is Tien Dong'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 Tien Dong was last updated on May 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since June 29, 2012PECOS EnrolledAccepts Medicare Assignment

86.1/100

CMS Quality Rating

3600 N INTERSTATE AVE, PORTLAND, OR 97227(800) 813-2000 Get Directions Write a Review

NPPES record last updated: May 26, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 26, 2026, Jun 10, 2025, Jul 12, 2024 and 2 more (5 updates tracked since 2020).

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About Dr. Tien Sy Dong M.d., Ph.d. NPPES

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

DR. TIEN SY DONG M.D., PH.D. (NPI 1730443177) is an individual gastroenterology provider in Portland, Oregon, licensed in Oregon (MD224637) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, maintains a secondary practice location in Santa Monica, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2012).

NPPES Registry Identity

NPI1730443177

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. TIEN SY DONGCredential: M.D., PH.D.

Location Address3600 N INTERSTATE AVEPortland, OR 97227-1106

Mailing Address500 Ne Multnomah St Ste 100Portland, OR 97232-2031

Phone(800) 813-2000

Sole ProprietorNo

Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 2012

Enumeration DateJune 29, 2012

Last NPPES UpdateMay 26, 20265 updates tracked since enumeration

NPPES CertifiedMay 26, 2026

✔ NPI 1730443177 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in OR · MD224637✔ Licensed in WA · MD61677767✔ Licensed in CA · A141717

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.

Also ListedInternal Medicine · HepatologyTaxonomy 207RI0008X · License A141717 (CA)

3600 N INTERSTATE AVE, Portland, OR 97227

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Secondary Practice Location 1

Location 11223 16th St Ste 3100Santa Monica, CA 90404-1275 · Phone (310) 582-6240 · Fax (424) 259-7789

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Tien Sy Dong M.d., Ph.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 ID3870726599

PECOS Enrollment IDI20251008004425

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.

Areas of Expertise CMS Part B claims 8

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 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.

122 services62 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.

95 services54 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.

76 services73 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.

69 services69 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.

21 services20 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.

21 services20 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97227 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.

86.1/100

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

Scored as part of a group practice

Quality

82.93

Promoting Interoperability

100

Improvement Activities

Cost

66.73

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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.

DAVID WEI KUO LIN M.D.

Otolaryngology

3600 N INTERSTATE AVE, INTERSTATE MEDICAL OFFICE CENTRAL
PORTLAND, OR 97227

Multnomah County (503) 331-6085

DR. LYNETTE SANTOS MALIK M.D.

Physical Medicine & Rehabilitation (Sports Medicine)

3600 N INTERSTATE AVE, DEPARTMENT OF PHYSICAL MEDICINE
PORTLAND, OR 97227

Multnomah County (503) 331-3070

DR. RYO A. SHOHARA M.D.

Internal Medicine (Hematology & Oncology)