Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

NIKKI KWOKSAM DUONG MD
NPI 1164884284
Internal Medicine - Hepatology in Palo Alto, CA

Q: What is Nikki Duong's NPI number?

The NPI number for Nikki Duong is 1164884284. It was assigned to this individual provider in the NPPES registry on March 28, 2016.

Q: What is Nikki Duong's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hepatology, with taxonomy code 207RI0008X.

Q: When was this NPI record last updated?

The NPPES record for Nikki Duong was last updated on September 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days 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 March 28, 2016PECOS Enrolled

300 PASTEUR DR, PALO ALTO, CA 94304(650) 723-4000 Get Directions Write a Review

NPPES record last updated: September 3, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

Record update history: Sep 3, 2026, Jul 3, 2019, Mar 28, 2016 (3 updates tracked since 2016).

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About Nikki Kwoksam Duong Md NPPES

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

NIKKI KWOKSAM DUONG MD (NPI 1164884284) is an individual hepatology provider in Palo Alto, California, licensed in California (A192254) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS, maintains a secondary practice location in Washington, and is a graduate of George Washington University School Of Medicine (2016).

NPPES Registry Identity

NPI1164884284

Entity TypeIndividualMale

Primary Taxonomy207RI0008X

Provider Legal NameNIKKI KWOKSAM DUONGCredential: MD

Location Address300 PASTEUR DRPalo Alto, CA 94304-2203

Mailing Address300 Pasteur DrPalo Alto, CA 94304-2203 · (650) 723-4000

Phone(650) 723-4000

Sole ProprietorYes

Medical School CMSGeorge Washington University School Of MedicineGraduated 2016

Enumeration DateMarch 28, 2016

Last NPPES UpdateSeptember 3, 20263 updates tracked since enumeration

NPPES CertifiedSeptember 3, 2026

✔ NPI 1164884284 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 5

★ Primary SpecialtyInternal Medicine · HepatologyAllopathic & Osteopathic Physicians

Taxonomy Code207RI0008X

License✔ Licensed in CA · A192254

Definition

The discipline of Hepatology encompasses the structure, function, and diseases of the liver and biliary tract. The American Board of Internal Medicine considers Hepatology part of the subspecialty of gastroenterology. Physicians who identify themselves as Hepatologists usually, but not always, have been trained in gastrointestinal programs.

Also ListedInternal MedicineTaxonomy 207R00000X · License A192254 (CA)

Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X · License A192254 (CA)

Also ListedInternal Medicine · Transplant HepatologyTaxonomy 207RT0003X · License A192254 (CA)

Also ListedHospitalistTaxonomy 208M00000X · License MD045392 (DC)

300 PASTEUR DR, Palo Alto, CA 94304

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Secondary Practice Location 1

Location 13800 Reservoir Rd NW Dept OfWashington, DC 20007-2113 · Phone (202) 444-8168

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

Nikki Kwoksam Duong 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 ID3173864055

PECOS Enrollment IDI20240105001417

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 7

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.

188 services48 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

104 services73 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

38 services38 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.

30 services30 patients

Measurement of liver stiffness 91200

Measurement of liver stiffness is a non-invasive procedure that helps assess the health of your liver. It uses sound waves to detect the hardness of the liver tissue, which can indicate conditions like fibrosis or cirrhosis. It's a simple, painless test that provides valuable information about your liver's health.

27 services27 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.

21 services18 patients

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.

RHEA MATHEW NP

Nurse Practitioner