DR. HA NGUYEN MD
NPI 1811212723
Anesthesiology in Mountain View, CA

Q: What is Ha Nguyen's NPI number?

The NPI number for Ha Nguyen is 1811212723. It was assigned to this individual provider in the NPPES registry on April 2, 2010.

Q: What is Ha Nguyen's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for Ha Nguyen was last updated on January 9, 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 April 02, 2010PECOS EnrolledAccepts Medicare Assignment

2500 GRANT RD, MOUNTAIN VIEW, CA 94040(650) 940-7000 Get Directions Write a Review

NPPES record last updated: January 9, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 9, 2020, Oct 2, 2016 (2 updates tracked since 2016).

On this page

About Dr. Ha Nguyen Md NPPES

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

DR. HA NGUYEN MD (NPI 1811212723) is an individual anesthesiology provider in Mountain View, California, licensed in New York (273411) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS and is a graduate of Other (2010).

NPPES Registry Identity

NPI1811212723

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameDR. HA NGUYENCredential: MD

Location Address2500 GRANT RDMountain View, CA 94040-4302

Mailing Address1422 El Camino RealMenlo Park, CA 94025-4110 · (650) 903-9500

Phone(650) 940-7000

Sole ProprietorNo

Medical School CMSOtherGraduated 2010

Enumeration DateApril 2, 2010

Last NPPES UpdateJanuary 9, 20202 updates tracked since enumeration

✔ NPI 1811212723 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in NY · 273411

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

2500 GRANT RD, Mountain View, CA 94040

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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 and accepts Medicare assignment

Dr. Ha 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 ID345522876

PECOS Enrollment IDI20180118002851

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

El Camino Anesthesia

9.6 mi

Anesthesiology

815 POLLARD RD
Los Gatos, CA 95032

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

NPI 1356910053 (408) 378-6131

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 5

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.

Anesthesia for procedure for total knee joint replacement 01402

Anesthesia for a total knee joint replacement numbs your body to eliminate pain during surgery. This could be general anesthesia where you're unconscious, or regional anesthesia where only the leg is numb. It's administered by a specialist, ensuring safety and comfort.

34 services33 patients

Anesthesia for total hip replacement 01214

Anesthesia for total hip replacement is a medical service where medication is given to eliminate pain during surgery. Two types are commonly used: general anesthesia, making you unconscious, or spinal anesthesia, numbing the lower body. The choice depends on your health and your doctor's recommendation.

17 services17 patients

Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447

This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.

14 services13 patients

Anesthesia for other procedure on lower abdomen 00840

Anesthesia for a lower abdomen procedure involves medication to eliminate pain during surgery. You might be awake but relaxed and pain-free, or you may be completely unconscious. It's administered to ensure comfort and safety throughout the operation.

13 services13 patients

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731

This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.

12 services12 patients

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.

Reported Quality Measures

Post-Anesthetic Transfer of Care Measure: Procedure Room to a Post Anesthesia Care Unit (PACU)

Percentage of patients, regardless of age, who are under the care of an anesthesia practitioner and are admitted to a PACU or other non-ICU location in which a post-anesthetic formal transfer of care protocol or checklist which includes the key transfer of…

9%173 patients1/55-star benchmark: 100%

Pre-operative OSA assessment

Percentage of patients who undergo a surgical procedure in the operating room/procedure room that have a pre-operative assessment for Obstructive Sleep Apnea (OSA)

47%627 patients2/55-star benchmark: 100%

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.

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.

BARBARA MOCNIK APRN

Registered Nurse (Psychiatric/Mental Health, Adult)

2500 GRANT RD
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 940-7187

DR. JONATHAN TODD ENGELHARDT MD

Emergency Medicine

2500 GRANT RD
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 940-7000

DR. SHAWN MATHEW JACOB MD

Internal Medicine

2500 GRANT RD
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 940-7000

NADIA KIRMANI

Student in an Organized Health Care Education/Training Program

2500 GRANT RD
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 940-7000

KELLEY DAVIS MS, RD

Dietitian, Registered

2500 GRANT RD, LPCH-4C
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 988-4111

TROY THOAI LAM MD

Internal Medicine

2500 GRANT RD
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 374-0001

MAX LEE

Student in an Organized Health Care Education/Training Program

2500 GRANT RD
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 940-7000

MS. TOVAH SHOSHANA KROKOSZYNSKI PSYD

Counselor (Mental Health)

2500 GRANT RD
MOUNTAIN VIEW, CA 94040

Santa Clara County (650) 988-3255

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 1811212723. It was assigned to this individual provider in the NPPES registry on April 2, 2010.

Where is Ha Nguyen located?

Ha Nguyen practices at 2500 Grant Rd, Mountain View, CA 94040. The listed phone number is (650) 940-7000.

What is Ha Nguyen's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

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.

Which organization bills Medicare for Ha Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ha Nguyen reassigns Medicare benefits to El Camino Anesthesia (Los Gatos, 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 Ha 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 Ha Nguyen was last updated on January 9, 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.