HA SON NGUYEN MD
NPI 1518256429
Neurological Surgery in Thousand Oaks, CA

Q: What is Ha Nguyen's NPI number?

The NPI number for Ha Nguyen is 1518256429. It was assigned to this individual provider in the NPPES registry on March 31, 2011.

Q: What is Ha Nguyen's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Ha Nguyen was last updated on March 2, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 March 31, 2011PECOS EnrolledAccepts Medicare Assignment

6.99/100

CMS Quality Rating

227 W JANSS RD, STE 125, THOUSAND OAKS, CA 91360(805) 372-1679 Get Directions Write a Review

NPPES record last updated: March 2, 2020. Verified against the NPPES registry weekly; last sync: October 04, 2026.

On this page

About Ha Son Nguyen Md NPPES

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

HA SON NGUYEN MD (NPI 1518256429) is an individual neurological surgery provider in Thousand Oaks, California, licensed in California (A15373) and active in the NPI registry since March 2011. He is enrolled in Medicare PECOS and is a graduate of Indiana University School Of Medicine (2011).

NPPES Registry Identity

NPI1518256429

Entity TypeIndividualMale

Primary Taxonomy207T00000X

Provider Legal NameHA SON NGUYENCredential: MD

Location Address227 W JANSS RD, STE 125Thousand Oaks, CA 91360-1856

Mailing Address227 W Janss Rd, Ste 125Thousand Oaks, CA 91360-1856

Phone(805) 372-1679

Sole ProprietorNo

Medical School CMSIndiana University School Of MedicineGraduated 2011

Enumeration DateMarch 31, 2011

Last NPPES UpdateMarch 2, 2020

NPPES CertifiedMarch 2, 2020

✔ NPI 1518256429 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207T00000X

License✔ Licensed in CA · A15373

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.

227 W JANSS RD, Thousand Oaks, CA 91360

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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

Ha Son 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 ID2365761830

PECOS Enrollment IDI20181212001137

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 17

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.

Continuous intraoperative neurophysiology monitoring, from outside the operating room (remote or nearby), per patient, (attention directed exclusively to one patient) each 15 minutes (list in addition to primary procedure) G0453

Continuous intraoperative neurophysiology monitoring is a service where a specialist oversees your nervous system's function during surgery, from a nearby or remote location. This is done every 15 minutes and is focused solely on you. It helps ensure surgical safety by identifying any potential nervous system changes promptly.

1,301 services118 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.

442 services113 patients

Placement of skin electrodes and measurement of stimulated sites on arms and legs 95938

This procedure involves placing small pads (electrodes) on your arms and legs. These electrodes send gentle electric signals to specific areas, and the responses are measured. This helps assess the health of your nerves and muscles.

214 services196 patients

Needle measurement of electrical activity in arm, leg, trunk or head muscles, limited study 95870

This procedure, known as an electromyography (EMG), involves using a needle to measure electrical activity in your muscles. It can help diagnose conditions affecting nerves or muscles. It's a limited study, meaning only specific muscles in the arm, leg, trunk, or head are examined.

153 services72 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.

132 services128 patients

Needle measurement of electrical activity in arm or leg muscles, 2 extremities 95861

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. It helps diagnose conditions affecting nerves or muscles. It's generally painless, though you may feel some discomfort.

89 services89 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.

74 services43 patients

Placement of skin electrodes and measurement of central motor stimulation in legs 95929

This procedure involves placing skin electrodes on your legs to measure the responses of your central nervous system. It helps in assessing the health and functionality of your nerves and muscles. The process is safe, non-invasive, and usually painless.

73 services65 patients

Placement of skin electrodes and measurement of central motor stimulation in arms and legs 95939

This procedure involves placing small patches (electrodes) on your skin over your arms and legs. These electrodes send harmless electrical signals to your muscles. The response is measured to assess the health and function of your nerves and muscles.

55 services52 patients

Testing of nerve-muscle junction 95937

Testing of the nerve-muscle junction, also known as Electromyography (EMG), is a diagnostic procedure to evaluate the health of muscles and the nerve cells that control them. It involves a small device detecting electrical activity from your muscles to identify potential issues.

49 services48 patients

Measurement of brain wave activity (eeg), 61-119 minutes 95813

The procedure you're having is an EEG, which measures your brain's electrical activity. Electrodes placed on your scalp capture signals that are recorded for 61-119 minutes. This helps identify any irregularities, aiding in diagnosing conditions like epilepsy or sleep disorders.

47 services45 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.

19 services19 patients

Placement of skin electrodes and measurement of stimulated sites in arms 95925

This procedure involves placing small, sticky patches called electrodes on your arms. These electrodes send tiny electrical signals to specific areas, which are then measured. This helps to assess the health of your nerves and muscles. It's safe and generally painless.

14 services14 patients

Placement of skin electrodes and measurement of stimulated sites in trunk or head 95927

This procedure involves placing small, sticky patches (electrodes) on the skin of your head or trunk. These electrodes measure responses from specific areas when a mild electrical stimulation is applied. It helps in diagnosing various nerve and muscle conditions.

14 services14 patients

Needle measurement of electrical activity in arm or leg muscles, complete study 95886

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.

13 services12 patients

Measurement of brain wave activity (eeg), digital analysis 95957

The measurement of brain wave activity, or EEG, involves recording and analyzing electrical signals from your brain. Small sensors are placed on the scalp to capture these signals. This digital analysis helps in diagnosing conditions like epilepsy or sleep disorders.

13 services13 patients

Needle measurement of electrical activity in arm or leg muscles, limited study 95885

This procedure, known as an electromyography (EMG), involves placing tiny needles into your arm or leg muscles to measure their electrical activity. It's a limited study, meaning only specific muscles are tested. This helps identify any muscle or nerve dysfunction.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91360 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

$140.72 typical visit price

range $62.32 – $185.36

Typical copayment $35.18 (range $15.58 – $46.34)

Most-billed visit code 99204

Established Patient

$77.11 typical visit price

range $20.68 – $151.85

Typical copayment $19.27 (range $5.17 – $37.96)

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.

6.99/100

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

Individually scored

Quality

Improvement Activities

Cost

23.31

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.

KELSEY LINDSEY NP

Family Medicine

227 W JANSS RD
THOUSAND OAKS, CA 91360

Ventura County (805) 795-7296

PAUL L. DUDLEY M.D.

Psychiatry & Neurology (Neurology)

227 W JANSS RD, #135
THOUSAND OAKS, CA 91360

Ventura County (805) 373-2890

DR. RICHARD LESSMAN M.D.

Internal Medicine (Nephrology)

227 W JANSS RD, SUITE 110
THOUSAND OAKS, CA 91360

Ventura County (805) 496-6051

CALIFORNIA KIDNEY MEDICAL GROUP INC

Internal Medicine (Nephrology)

227 W JANSS RD, SUITE 110
THOUSAND OAKS, CA 91360

Ventura County (805) 496-6051

JASON CHEN-SHAN LEE M.D.

Radiology (Diagnostic Radiology)

227 W JANSS RD, #150
THOUSAND OAKS, CA 91360

Ventura County (805) 496-7755

DR. MARK E. MERRIMAN M.D.

Anesthesiology

227 W JANSS RD, STE 240
THOUSAND OAKS, CA 91360

Ventura County (805) 371-0455

DR. FRANCOISE GIAO PHUONG MENTEER MD

Internal Medicine

227 W JANSS RD, SUITE 305
THOUSAND OAKS, CA 91360

Ventura County (805) 449-4181

DR. HARRY J COZEN M.D.

Anesthesiology

227 W JANSS RD
THOUSAND OAKS, CA 91360

Ventura County (805) 371-0455

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 Ha Nguyen's NPI number?

The NPI number for Ha Nguyen is 1518256429. It was assigned to this individual provider in the NPPES registry on March 31, 2011.

Where is Ha Nguyen located?

Ha Nguyen practices at 227 W Janss Rd Ste 125, Thousand Oaks, CA 91360. The listed phone number is (805) 372-1679.

What is Ha Nguyen's specialty?

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

Is Ha Nguyen enrolled in Medicare?

Yes. Ha 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 Ha Nguyen was last updated on March 2, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.