DR. KEN DUONG NGUYEN M.D.
NPI 1205193828
Internal Medicine - Gastroenterology in Temple City, CA

Q: What is Ken Nguyen's NPI number?

The NPI number for Ken Nguyen is 1205193828. It was assigned to this individual provider in the NPPES registry on April 20, 2012. The provider is also known as Khang Duong Nguyen M.D..

Q: What is Ken Nguyen'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 Ken Nguyen was last updated on November 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 April 20, 2012PECOS EnrolledAccepts Medicare Assignment

6271 ROSEMEAD BLVD, TEMPLE CITY, CA 91780(626) 898-4560(626) 898-4561 Get Directions Write a Review

NPPES record last updated: November 23, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 23, 2023, Feb 1, 2023, Sep 13, 2021 and 12 more (15 updates tracked since 2016).

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About Dr. Ken Duong Nguyen M.d. NPPES

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

DR. KEN DUONG NGUYEN M.D. (NPI 1205193828) is an individual gastroenterology provider in Temple City, California, licensed in California (A127222) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, maintains a secondary practice location in Los Angeles, and is a graduate of Boston University School Of Medicine (2012).

NPPES Registry Identity

NPI1205193828

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. KEN DUONG NGUYENCredential: M.D.

Location Address6271 ROSEMEAD BLVDTemple City, CA 91780-1562

Mailing Address6271 Rosemead BlvdTemple City, CA 91780-1562 · (626) 898-4560 · Fax (626) 898-4561

Phone(626) 898-4560

Fax(626) 898-4561

Sole ProprietorNo

Medical School CMSBoston University School Of MedicineGraduated 2012

Enumeration DateApril 20, 2012

Last NPPES UpdateNovember 23, 202315 updates tracked since enumeration

NPPES CertifiedNovember 23, 2023

✔ NPI 1205193828 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · A127222

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 A127222 (CA)

6271 ROSEMEAD BLVD, Temple City, CA 91780

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Other Names 1

Former Name (1)Khang Duong Nguyen M.d.

Secondary Practice Location 1

Location 11828 E Cesar E Chavez Ave Ste 6200Los Angeles, CA 90033-2585 · Phone (213) 328-0819 · Fax (844) 407-0584

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

Dr. Ken Duong Nguyen 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 ID2062644487

PECOS Enrollment IDI20140906000014

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

Medicare enrollment records show Ken Nguyen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Genesis Healthcare Partners PC

87 mi

Specialist

320 SANTA FE DR STE 108
Encinitas, CA 92024

Reassigned Medicare billing, California enrollment
242 clinicians in this Medicare group

NPI 1548567498 (760) 436-4558

Ridgecrest Regional Hospital

105 mi

Rural Health

1041 N CHINA LAKE BLVD
Ridgecrest, CA 93555

Reassigned Medicare billing, California enrollment
Also billed through NPI 1164067971 (California)
143 clinicians in this Medicare group

NPI 1639448400 (760) 446-0121

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 18

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.

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.

232 services164 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.

112 services112 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.

101 services101 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.

86 services80 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.

61 services61 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.

49 services49 patients

Complete ultrasound scan of abdomen 76700

A complete ultrasound scan of the abdomen is a non-invasive imaging procedure. It uses sound waves to produce images of the organs in your abdomen, such as the liver, gallbladder, spleen, pancreas, and kidneys. It helps in diagnosing, monitoring, and planning treatments.

38 services30 patients

Removal of external hemorrhoids by rubber banding 46221

Rubber band ligation is a procedure used to treat external hemorrhoids. A doctor places small rubber bands around the base of the hemorrhoids. This cuts off blood supply, causing them to shrink and fall off, typically within a week.

34 services13 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.

33 services24 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.

33 services33 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.

27 services27 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.

22 services22 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.

20 services20 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.

19 services15 patients

Ultrasound scan of organ tissue for measuring elasticity 76981

An ultrasound scan of organ tissue measures elasticity, or flexibility. This non-invasive procedure uses sound waves to create images of the inside of your body. It helps in assessing the health of various organs by detecting changes in their stiffness or softness.

15 services15 patients

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.

15 services11 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.

15 services15 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.

14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91780 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

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

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 4

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

KEN D. NGUYEN, M.D., INC.

Internal Medicine (Gastroenterology)

6271 ROSEMEAD BLVD
TEMPLE CITY, CA 91780

Los Angeles County (626) 898-4560

ANDY CHOW

Nurse Practitioner (Psychiatric/Mental Health)

6271 ROSEMEAD BLVD
TEMPLE CITY, CA 91780

Los Angeles County (626) 898-4560

DR. TIEN-CHUN CHEN MD

Internal Medicine (Gastroenterology)

6271 ROSEMEAD BLVD
TEMPLE CITY, CA 91780

Los Angeles County (626) 898-4560

UNKNOWN LIANNA NP

Nurse Practitioner (Primary Care)

6271 ROSEMEAD BLVD
TEMPLE CITY, CA 91780

Los Angeles County (626) 898-4560

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 Ken Nguyen's NPI number?

The NPI number for Ken Nguyen is 1205193828. It was assigned to this individual provider in the NPPES registry on April 20, 2012. The provider is also known as Khang Duong Nguyen M.D..

Where is Ken Nguyen located?

Ken Nguyen practices at 6271 Rosemead Blvd, Temple City, CA 91780. The listed phone number is (626) 898-4560.

What is Ken Nguyen's specialty?

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

Is Ken Nguyen enrolled in Medicare?

Yes. Ken Nguyen 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 Ken Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ken Nguyen reassigns Medicare benefits to 2 organizations: Genesis Healthcare Partners PC (Encinitas, CA) and Ridgecrest Regional Hospital (Ridgecrest, CA). 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 Ken Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ken Nguyen was last updated on November 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.