GARY CHEN M.D.
NPI 1720200132
Internal Medicine - Gastroenterology in Las Vegas, NV

Q: What is Gary Chen's NPI number?

The NPI number for Gary Chen is 1720200132. It was assigned to this individual provider in the NPPES registry on May 3, 2007.

Q: What is Gary Chen'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 Gary Chen was last updated on February 21, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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 May 03, 2007PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

8530 W SUNSET RD, SUITE 230, LAS VEGAS, NV 89113(702) 483-4483(702) 483-4493 Get Directions Write a Review

NPPES record last updated: February 21, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Gary Chen M.d. NPPES

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

GARY CHEN M.D. (NPI 1720200132) is an individual gastroenterology provider in Las Vegas, Nevada, licensed in Nevada (13449) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Spring Valley Hospital Medical Center, and is a graduate of University Of California, Geffen School Of Medicine (2004).

NPPES Registry Identity

NPI1720200132

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameGARY CHENCredential: M.D.

Location Address8530 W SUNSET RD, SUITE 230Las Vegas, NV 89113-2215

Mailing Address8530 W Sunset Rd, Suite 230Las Vegas, NV 89113-2215 · (702) 483-4483 · Fax (702) 483-4493

Phone(702) 483-4483

Fax(702) 483-4493

Sole ProprietorNo

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 2004

Enumeration DateMay 3, 2007

Last NPPES UpdateFebruary 21, 2017

✔ NPI 1720200132 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 NV · 13449✔ Licensed in CA · A965014

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.

8530 W SUNSET RD, Las Vegas, NV 89113

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Other Identifiers 2

Medicare PINEJ236ZNV

Medicaid1720200132NV

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health.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

Gary Chen 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 ID1456531615

PECOS Enrollment IDI20110207000174

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 Gary Chen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Kim Chen PLLC

Same address

Gastroenterology

8530 W. SUNSET RD, SUITE 230
Las Vegas, NV 89113

Reassigned Medicare billing, Nevada enrollment
24 clinicians in this Medicare group

NPI 1881078418 (702) 483-4483

Southwest Medical Associates, Inc

8.5 mi

Internal Medicine

888 S RANCHO DR
Las Vegas, NV 89106

Reassigned Medicare billing, Nevada enrollment
406 clinicians in this Medicare group

NPI 1659346005 (702) 877-8600

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 19

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.

Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439

Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.

684 services58 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

392 services58 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.

141 services124 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.

127 services127 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.

116 services108 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.

72 services72 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.

67 services67 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.

66 services66 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.

60 services60 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.

47 services47 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

40 services39 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.

40 services40 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

31 services28 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

28 services23 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.

26 services26 patients

Telephone medical discussion provided by nonphysician professional, 5-10 minutes 98966

This is a brief, 5-10 minute medical consultation conducted over the phone by a trained healthcare professional. It's a convenient way to discuss your health concerns, get advice, or receive guidance on managing your condition. It's not a physical examination but can be a valuable tool for your healthcare.

23 services20 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.

18 services18 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

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

13 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Spring Valley Hospital Medical Center

Acute Care Hospitals · Las Vegas, NV

2/5 CMS rating

OwnershipProprietary

CMS Certification Number290046

Location5400 South Rainbow BlvdLas Vegas, NV 89118 · Clark County

Emergency services Birthing friendly

Cleveland Clinic Avon Hospital

Acute Care Hospitals · Avon, OH

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number360364

Location33300 Cleveland Clinic BlvdAvon, OH 44011 · Lorain County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 89113 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

$131.25 typical visit price

range $57.07 – $173.24

Typical copayment $32.81 (range $14.26 – $43.31)

Most-billed visit code 99204

Established Patient

$100.60 typical visit price

range $18.27 – $140.96

Typical copayment $25.15 (range $4.56 – $35.24)

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.

75/100

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

Scored as part of a group practice

Other Providers at the Same Location NPPES 11

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

SAN MARTIN SURGERY CENTER LLC

Clinic/Center (Ambulatory Surgical)

8530 W SUNSET RD, STE 100
LAS VEGAS, NV 89113

Clark County (702) 789-5700

FRASER HAND SURGERY LLC

Orthopaedic Surgery (Hand Surgery)

8530 W SUNSET RD, SUITE 345
LAS VEGAS, NV 89113

Clark County (702) 576-1818

ELIZABETH L HUCK DO

Radiology (Diagnostic Radiology)

8530 W SUNSET RD, SUITE 120
LAS VEGAS, NV 89113

Clark County (702) 254-5004

DR. KEVIN RAYLS M.D.

Surgery

8530 W SUNSET RD, SUITE 240
LAS VEGAS, NV 89113

Clark County (702) 796-0022

DR. TAREK AMMAR MD

Internal Medicine (Gastroenterology)

8530 W SUNSET RD, SUITE 230
LAS VEGAS, NV 89113

Clark County (702) 483-4483

DR. CHRISTIAN DIAZ STONE MD, MPH

Internal Medicine (Gastroenterology)

8530 W SUNSET RD, SUITE 230
LAS VEGAS, NV 89113

Clark County (702) 483-4483

ANDREW KIM MD

Internal Medicine (Gastroenterology)

8530 W SUNSET RD, SUITE 230
LAS VEGAS, NV 89113

Clark County (702) 483-4483

KARINA HERRERA

Internal Medicine

8530 W SUNSET RD
LAS VEGAS, NV 89113

Clark County (702) 483-4484

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 Gary Chen's NPI number?

The NPI number for Gary Chen is 1720200132. It was assigned to this individual provider in the NPPES registry on May 3, 2007.

Where is Gary Chen located?

Gary Chen practices at 8530 W Sunset Rd Suite 230, Las Vegas, NV 89113. The listed phone number is (702) 483-4483.

What is Gary Chen's specialty?

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

Is Gary Chen enrolled in Medicare?

Yes. Gary Chen 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 Gary Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Chen reassigns Medicare benefits to 2 organizations: Kim Chen PLLC (Las Vegas, NV) and Southwest Medical Associates, Inc (Las Vegas, NV). 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 Gary Chen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gary Chen accept?

Health plans from Ambetter from Arizona Complete Health list Gary Chen 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 Gary Chen affiliated with any hospitals?

According to CMS data, Gary Chen is affiliated with Spring Valley Hospital Medical Center and Cleveland Clinic Avon Hospital.

When was this NPI record last updated?

The NPPES record for Gary Chen was last updated on February 21, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.