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TIEN TRONG NGUYEN MD
NPI 1356385025
Neurological Surgery in Fountain Valley, CA

Active since June 15, 2006PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
11190 WARNER AVE, SUITE 305, FOUNTAIN VALLEY, CA 92708(714) 433-2000(714) 433-2901 Get Directions Write a Review

NPPES record last updated: February 28, 2013. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Tien Trong Nguyen Md NPPES

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

TIEN TRONG NGUYEN MD (NPI 1356385025) is an individual neurological surgery provider in Fountain Valley, California, licensed in California (G81962) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (1993).

NPPES Registry Identity

NPI1356385025
Entity TypeIndividualMale
Primary Taxonomy207T00000X
Provider Legal NameTIEN TRONG NGUYENCredential: MD
Location Address11190 WARNER AVE, SUITE 305Fountain Valley, CA 92708-4019
Mailing Address11190 Warner Ave, Suite 305Fountain Valley, CA 92708-4019 · (714) 433-2000 · Fax (714) 433-2901
Phone(714) 433-2000
Fax(714) 433-2901
Sole ProprietorNo
Medical School CMSNew York Medical CollegeGraduated 1993
Enumeration DateJune 15, 2006
Last NPPES UpdateFebruary 28, 2013
✔ NPI 1356385025 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
License✔ Licensed in CA · G81962
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
Also ListedOrthopaedic SurgeryTaxonomy 207X00000X · License G81962 (CA)
11190 WARNER AVE, Fountain Valley, CA 92708
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Other Identifiers 3

Medicare PINBW766ZCA
Medicaid00G819620CA
Medicare PINWG81962ACA

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

Tien Trong 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 ID2466354030
PECOS Enrollment IDI20090710000520
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 8

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 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.
440 services162 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
221 services209 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.
195 services195 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
186 services73 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.
51 services24 patients
Insertion of cage or mesh device to spine bone and disc space during spine fusion 22853
Spine fusion is a procedure to join two or more vertebrae. During this process, a cage or mesh device is inserted into the spine bone and disc space. This helps to stabilize the spine, reduce pain, and improve functionality. The device acts as a bridge for new bone to grow on.
35 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92708 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.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice

Reported Quality Measures

Closing the Referral Loop: Receipt of Specialist Report
Percentage of patients with referrals, regardless of age, for which the referring provider receives a report from the provider to whom the patient was referred
3%1,155 patients1/55-star benchmark: 95%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
98%2,961 patients4/55-star benchmark: 100%
Health Information Exchange
The MIPS eligible clinician that transitions or refers their patient to another setting of care or health care clinician (1) uses CEHRT to create a summary of care record; and (2) electronically transmits such summary to a receiving health care clinician for…
4%248 patients1/55-star benchmark: 88%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
98%125 patients4/55-star benchmark: 100%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
27%1,567 patients2/55-star benchmark: 97%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
Patients screenedForUse: 99% · 677 patients
Patients tobacco: 80% · 677 patients
7%136 patients1/55-star benchmark: 98%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
73%630 patients3/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
40%630 patients2/55-star benchmark: 89%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 0% · 557 patients
0%557 patients5/55-star benchmark: 100%
View, Download, or Transmit (VDT)
At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.
9%630 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Transport chair, adult size, patient weight capacity up to and including 300 pounds E1038
DME-Other DME · category DE000N
1 supplier12 claims12 services$6.48 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

TIEN T NGUYEN M.D. INC.
Neurological Surgery
11190 WARNER AVE, SUITE 305
FOUNTAIN VALLEY, CA 92708
Orange County (714) 433-2000
SLEEP & RESEARCH CENTER OF FOUNTAIN VALLEY
Physiological Laboratory
11190 WARNER AVE, SUITE 401
FOUNTAIN VALLEY, CA 92708
Orange County (714) 979-2999
RICHARD YD LIN
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
11190 WARNER AVE, SUITE 306
FOUNTAIN VALLEY, CA 92708
Orange County (714) 432-9990
KRIS TON PA-C
Physician Assistant (Surgical)
11190 WARNER AVE, SUITE 300
FOUNTAIN VALLEY, CA 92708
Orange County (714) 241-7000
SPECIALTY SURGERY CENTER AT FOUNTAIN VALLEY REGIONAL HOSPITAL LLC
Clinic/Center (Ambulatory Surgical)
11190 WARNER AVE, SUITE 212
FOUNTAIN VALLEY, CA 92708
Orange County (714) 427-0880
AMOS YI PA-C
Physician Assistant (Surgical)
11190 WARNER AVE, SUITE 305
FOUNTAIN VALLEY, CA 92708
Orange County (714) 433-2000
AFSHAN ASHRAF ALI M.D.
Pediatrics (Pediatric Hematology-Oncology)
11190 WARNER AVE, SUITE 307
FOUNTAIN VALLEY, CA 92708
Orange County (714) 545-6400
RAM MUDIYAM MD INC
Orthopaedic Surgery
11190 WARNER AVE, SUITE 310
FOUNTAIN VALLEY, CA 92708
Orange County (714) 979-2401

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 1356385025. It was assigned to this individual provider in the NPPES registry on June 15, 2006.

Where is Tien Nguyen located?

Tien Nguyen practices at 11190 Warner Ave Suite 305, Fountain Valley, CA 92708. The listed phone number is (714) 433-2000.

What is Tien Nguyen's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Tien Nguyen enrolled in Medicare?

Yes. Tien 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.

When was this NPI record last updated?

The NPPES record for Tien Nguyen was last updated on February 28, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.