HUY T. NGUYEN MD
NPI 1851514640
Internal Medicine - Cardiovascular Disease in Mission Viejo, CA

Q: What is Huy Nguyen's NPI number?

The NPI number for Huy Nguyen is 1851514640. It was assigned to this individual provider in the NPPES registry on April 10, 2007.

Q: What is Huy Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Huy Nguyen was last updated on July 20, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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 10, 2007PECOS EnrolledAccepts Medicare Assignment

95.77/100

CMS Quality Rating

27800 MEDICAL CENTER RD, SUITE 222, MISSION VIEJO, CA 92691(949) 276-2446(949) 276-2449 Get Directions Write a Review

NPPES record last updated: July 20, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Huy T. Nguyen Md NPPES

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

HUY T. NGUYEN MD (NPI 1851514640) is an individual cardiovascular disease provider in Mission Viejo, California, licensed in California (A89993) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2003).

NPPES Registry Identity

NPI1851514640

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameHUY T. NGUYENCredential: MD

Location Address27800 MEDICAL CENTER RD, SUITE 222Mission Viejo, CA 92691-6410

Mailing Address27800 Medical Center Rd, Suite 222Mission Viejo, CA 92691-6410 · (949) 276-2446 · Fax (949) 276-2449

Phone(949) 276-2446

Fax(949) 276-2449

Sole ProprietorNo

Medical School CMSOtherGraduated 2003

Enumeration DateApril 10, 2007

Last NPPES UpdateJuly 20, 2015

✔ NPI 1851514640 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in CA · A89993

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

27800 MEDICAL CENTER RD, Mission Viejo, CA 92691

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Other Identifiers 1

Medicare PINEN921ZCA

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

Huy T. Nguyen 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 ID2860673597

PECOS Enrollment IDI20110228000911

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

Ccoc, Inc.

2.0 mi

Clinical Cardiac Electrophysiology

333 CORPORATE DR STE 102
Ladera Ranch, CA 92694

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

NPI 1285968909 (949) 276-2446

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

510 services481 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.

478 services258 patients

Injection, regadenoson, 0.1 mg J2785

Regadenoson injection, 0.1 mg, is a medication used to help visualize the heart during a stress test. It works by increasing blood flow in the arteries of the heart. It's injected into a vein and is generally well-tolerated.

278 services71 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

212 services200 patients

Evaluation of cardiac rhythm monitor system, remote up to 30 days 93298

This procedure involves remotely monitoring your heart rhythm for up to 30 days. A small device will record your heart's activity, which can be accessed by your healthcare team. This aids in diagnosing any irregularities or issues with your heart function.

193 services24 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

177 services164 patients

Technetium tc-99m sestamibi, diagnostic, per study dose A9500

Technetium Tc-99m Sestamibi is a diagnostic test used to create images of your heart or breast tissues. It involves a safe radioactive substance injection that helps doctors to detect any abnormalities or changes in these tissues.

177 services89 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.

156 services156 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

91 services91 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician 93015

An exercise or drug-induced heart stress test with ECG is a procedure performed by a doctor to assess how your heart responds to exertion. It involves monitoring your heart's electrical activity while you exercise or after medication is given to mimic exercise effects.

90 services90 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

74 services70 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days 93294

This procedure evaluates your pacemaker system remotely for up to 90 days. It checks whether single, dual, multiple lead, or leadless pacemakers are working properly. It's a safe, convenient way to ensure your heart device is functioning optimally.

65 services19 patients

Ultrasound of heart with continuous electrocardiogram (ecg) during rest, exercise and/or drug induced stress with review and report 93351

This procedure involves using ultrasound technology to create images of your heart while you rest, exercise, or undergo drug-induced stress. An ECG continuously monitors your heart's electrical activity. It helps doctors assess heart health and function.

30 services30 patients

Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional 93228

An Electrocardiogram (ECG) is a non-invasive test that records the electrical signals in your heart. For up to 30 days, a small device will continuously monitor your heart's activity. A healthcare professional will then review the data and provide a report on your heart's function.

27 services27 patients

Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional 93229

An Electrocardiogram (ECG) is a test that records your heart's electrical activity for up to 30 days. You trigger a transmission if you feel symptoms, which is then reviewed by a healthcare professional. The report helps diagnose heart conditions.

27 services27 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

22 services21 patients

Programming of cardiac rhythm monitor system 93285

Programming of a cardiac rhythm monitor system involves setting up a device to track your heart's activity. This helps identify irregular heartbeats or rhythms. The data collected assists your healthcare team in making accurate treatment decisions.

18 services11 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

17 services17 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.

14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92691 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

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

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.

95.77/100

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

Scored through an Alternative Payment Model

Quality

84.33

Promoting Interoperability

Improvement Activities

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.

THEODORE J. CALIENDO, M.D., A MEDICAL CORPORATION

Pediatrics

27800 MEDICAL CENTER RD, SUITE 204
MISSION VIEJO, CA 92691

Orange County (949) 364-3691

KENNETH K PADDIE A PROFESSIONAL CORP

Otolaryngology

27800 MEDICAL CENTER RD, SUITE 261
MISSION VIEJO, CA 92691

Orange County (949) 364-2555

MEDINA PEDIATRICS, INC.

Pediatrics (Neonatal-Perinatal Medicine)

27800 MEDICAL CENTER RD, SUITE 204
MISSION VIEJO, CA 92691

Orange County (949) 364-3532

REXINGER MEDICAL GROUP, INC.

Family Medicine

27800 MEDICAL CENTER RD, SUITE 461
MISSION VIEJO, CA 92691

Orange County (949) 364-5600

DR. BRETT MICHAEL WERTMAN M.D.

Internal Medicine (Cardiovascular Disease)

27800 MEDICAL CENTER RD, SUITE 222
MISSION VIEJO, CA 92691

Orange County (949) 276-2446

JACKSON MOSES, DDS, INC

Dentist (Oral and Maxillofacial Surgery)

27800 MEDICAL CENTER RD, 238
MISSION VIEJO, CA 92691

Orange County (949) 364-0220

BRITTANY DANIELLE FARMER ACSW

Social Worker (Clinical)

27800 MEDICAL CENTER RD
MISSION VIEJO, CA 92691

Orange County (949) 866-3600

DR. ANDREW CHANG

Dentist (Pediatric Dentistry)

27800 MEDICAL CENTER RD, SUITE 332
MISSION VIEJO, CA 92691

Orange County (949) 364-1171

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 Huy Nguyen's NPI number?

The NPI number for Huy Nguyen is 1851514640. It was assigned to this individual provider in the NPPES registry on April 10, 2007.

Where is Huy Nguyen located?

Huy Nguyen practices at 27800 Medical Center Rd Suite 222, Mission Viejo, CA 92691. The listed phone number is (949) 276-2446.

What is Huy Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Huy Nguyen enrolled in Medicare?

Yes. Huy 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 organization bills Medicare for Huy Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Huy Nguyen reassigns Medicare benefits to Ccoc, Inc. (Ladera Ranch, CA). 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 Huy 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 Huy Nguyen was last updated on July 20, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.