TIEN NGUYEN M.D
NPI 1013923481
Surgery - Vascular Surgery in Bakersfield, CA

Q: What is Tien Nguyen's NPI number?

The NPI number for Tien Nguyen is 1013923481. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Q: What is Tien Nguyen's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.

Q: When was this NPI record last updated?

The NPPES record for Tien Nguyen was last updated on June 2, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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 July 31, 2006PECOS Enrolled

19.5/100

CMS Quality Rating

4901 CENTENNIAL PLAZA WAY, BAKERSFIELD, CA 93312(661) 588-1150(661) 241-4052 Get Directions Write a Review

NPPES record last updated: June 2, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Tien Nguyen M.d NPPES

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

TIEN NGUYEN M.D (NPI 1013923481) is an individual vascular surgery provider in Bakersfield, California, licensed in California (A91766) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (2003).

NPPES Registry Identity

NPI1013923481

Entity TypeIndividualMale

Primary Taxonomy2086S0129X

Provider Legal NameTIEN NGUYENCredential: M.D

Location Address4901 CENTENNIAL PLAZA WAYBakersfield, CA 93312-2011

Mailing Address4901 Centennial Plaza WayBakersfield, CA 93312-2011 · (661) 588-1150 · Fax (661) 241-4052

Phone(661) 588-1150

Fax(661) 241-4052

Sole ProprietorNo

Medical School CMSUniversity Of California, San Diego School Of MedicineGraduated 2003

Enumeration DateJuly 31, 2006

Last NPPES UpdateJune 2, 2011

✔ NPI 1013923481 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtySurgery · Vascular SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code2086S0129X

License✔ Licensed in CA · A91766

Definition

A surgeon with expertise in the management of surgical disorders of the blood vessels, excluding the intracranial vessels or the heart.

Also ListedFamily MedicineTaxonomy 207Q00000X · License A91766 (CA)

Also ListedSurgeryTaxonomy 208600000X · License A91766 (CA)

4901 CENTENNIAL PLAZA WAY, Bakersfield, CA 93312

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tien Nguyen M.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5294905675

PECOS Enrollment IDI20110822000232

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 Tien Nguyen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hao D. Bui, M.D., Inc.

Same address

Vascular Surgery

4901 CENTENNIAL PLAZA WAY
Bakersfield, CA 93312

Reassigned Medicare billing, California enrollment
Medicare enrollment name: Hao D Bui MD Inc
7 clinicians in this Medicare group

NPI 1972790863 (661) 387-8333

Kern County Hospital Authority

3.1 mi

General Acute Care Hospital

6001 TRUXTUN AVE STE 210
Bakersfield, CA 93309

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

NPI 1699282285 (661) 326-2000

Sumeet Bhinder MD Inc

4.4 mi

Rheumatology

2634 G ST
Bakersfield, CA 93301

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

NPI 1649584319 (661) 588-4001

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 23

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.

637 services319 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.

175 services175 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.

144 services34 patients

Injection, midazolam hydrochloride, per 1 mg J2250

Midazolam hydrochloride is a medication injected to help you relax or sleep before surgery or certain medical procedures. It works by calming the brain and nerves. It's given in small doses, measured in milligrams (mg).

83 services66 patients

Management of oxygen chamber therapy 99183

Oxygen chamber therapy involves breathing pure oxygen in a pressurized room or tube. It's used to treat various conditions like wounds that won't heal due to diabetes or radiation injury. In this therapy, your body's tissues get more oxygen to promote healing and fight infection.

80 services26 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.

79 services76 patients

Injection, fentanyl citrate, 0.1 mg J3010

Fentanyl citrate is a potent pain medication administered via injection. The 0.1 mg dosage is used to manage severe pain conditions. It works by blocking pain signals to the brain. It's crucial to follow the dosage instructions to prevent potential side effects.

61 services52 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

58 services46 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.

43 services22 patients

Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance 36475

This procedure involves using radiofrequency energy, a type of heat energy, to close off an unhealthy vein in your arm or leg. Imaging guidance helps ensure precise targeting of the vein. This helps improve blood flow by rerouting it through healthier veins.

41 services37 patients

Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist 36902

This procedure involves inserting a needle or tube into your hemodialysis circuit, a system that cleans your blood when your kidneys can't. A balloon is then used to widen a narrow section of this circuit. A radiologist reviews the procedure to ensure accuracy.

37 services32 patients

Review by radiologist of arm or leg artery image 75710

This procedure involves a radiologist examining images of your arm or leg arteries. These images are obtained through a non-invasive method, like an ultrasound or CT scan. The radiologist reviews these images to identify any abnormalities, such as blockages or narrowing, which can affect blood flow.

27 services23 patients

Review by radiologist of abdominal aorta image 75625

This is a procedure where a radiologist, a doctor specialized in medical imaging, examines an image of your abdominal aorta. The abdominal aorta is the large blood vessel that carries blood to your lower body. The radiologist checks for any abnormalities to ensure your overall vascular health.

26 services24 patients

Ultrasonic guidance for blood vessel access 76937

26 services25 patients

Review by radiologist of abdominal aorta image 75625

24 services23 patients

Balloon dilation of artery of leg, initial vessel 37228

Balloon dilation of the artery of the leg is a procedure to improve blood flow. A small balloon is inserted into the leg artery and inflated to widen the vessel, allowing better circulation. This is typically the first vessel treated.

21 services18 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.

21 services16 patients

Balloon dilation of dialysis segment with review by radiologist 36907

Balloon dilation of a dialysis segment is a procedure where a tiny balloon is inserted and inflated in a narrowed area of your dialysis access site, improving blood flow. A radiologist reviews images to ensure success.

15 services13 patients

Balloon dilation of artery of leg 37224

Balloon dilation of the leg artery is a procedure to improve blood flow. A tiny balloon is inserted into a narrowed artery, then inflated to widen the artery. This helps increase blood circulation to the leg. It's usually done under local anesthesia.

15 services13 patients

Removal of tunneled central venous tube 36589

A tunneled central venous tube removal is a procedure to take out a long, thin tube that was previously placed in a large vein in your body. This tube helps deliver medication or nutrition. The removal is usually quick and done under local anesthesia.

14 services13 patients

Injection of chemical agent into multiple incompetent veins of leg 36471

This procedure involves injecting a special chemical into problematic veins in the leg. The chemical helps to close off these veins, rerouting blood through healthier veins. This can alleviate discomfort and improve the appearance of the treated area.

13 services13 patients

Chemical destruction of first incompetent vein of arm or leg using imaging guidance 36482

This procedure involves using a chemical to close off a malfunctioning vein in your arm or leg. Imaging guidance is used to accurately locate the vein. This helps improve blood flow by rerouting it through healthier veins.

12 services12 patients

Insertion of needle and/or tube into hemodialysis circuit with review by radiologist 36901

This procedure involves inserting a needle or tube into your hemodialysis circuit, which is part of the system that cleans your blood when your kidneys can't. A radiologist, a doctor specialized in imaging techniques, will review the process to ensure everything is correct.

12 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93312 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

$91.09 typical visit price

range $59.26 – $178.09

Typical copayment $22.77 (range $14.81 – $44.52)

Most-billed visit code 99203

Established Patient

$73.67 typical visit price

range $19.34 – $145.64

Typical copayment $18.41 (range $4.83 – $36.41)

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.

19.5/100

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

Individually scored

Quality

Improvement Activities

Cost

65.02

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.

DR. ALLAN LAGDAMEN CAPOTE M.D.

Surgery (Vascular Surgery)

4901 CENTENNIAL PLAZA WAY
BAKERSFIELD, CA 93312

Kern County (661) 387-8333

DR. YAZEN QUMSIYEH MD

Surgery (Vascular Surgery)

4901 CENTENNIAL PLAZA WAY
BAKERSFIELD, CA 93312

Kern County (661) 387-8333

DR. HAO DAI BUI

Surgery (Vascular Surgery)

4901 CENTENNIAL PLAZA WAY
BAKERSFIELD, CA 93312

Kern County (661) 387-8333

HAO D. BUI, M.D., INC.

Surgery (Vascular Surgery)

4901 CENTENNIAL PLAZA WAY
BAKERSFIELD, CA 93312

Kern County (661) 387-8333

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 Tien Nguyen's NPI number?

The NPI number for Tien Nguyen is 1013923481. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Where is Tien Nguyen located?

Tien Nguyen practices at 4901 Centennial Plaza Way, Bakersfield, CA 93312. The listed phone number is (661) 588-1150.

What is Tien Nguyen's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.

Is Tien Nguyen enrolled in Medicare?

Yes. Tien Nguyen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Tien Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tien Nguyen reassigns Medicare benefits to 3 organizations: Hao D. Bui, M.D., Inc. (Bakersfield, CA), Kern County Hospital Authority (Bakersfield, CA) and Sumeet Bhinder MD Inc (Bakersfield, 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 Tien 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 Tien Nguyen was last updated on June 2, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.