DR. LOUIS ZHANG MD
NPI 1952843757
Surgery - Vascular Surgery in Monterey, CA

Q: What is Louis Zhang's NPI number?

The NPI number for Louis Zhang is 1952843757. It was assigned to this individual provider in the NPPES registry on November 9, 2016.

Q: What is Louis Zhang'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 Louis Zhang was last updated on February 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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 November 09, 2016PECOS EnrolledAccepts Medicare Assignment

23845 HOLMAN HWY STE 105, MONTEREY, CA 93940(831) 333-3040(831) 886-3647 Get Directions Write a Review

NPPES record last updated: February 17, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 28, 2023, Nov 8, 2021, Jul 19, 2021 and 1 more (4 updates tracked since 2016).

On this page

About Dr. Louis Zhang Md NPPES

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

DR. LOUIS ZHANG MD (NPI 1952843757) is an individual vascular surgery provider in Monterey, California, licensed in California (145846) and active in the NPI registry since November 2016. He is enrolled in Medicare PECOS, is affiliated with Prov Sacred Hrt Med Ctr & Childs Hosp., and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1952843757

Entity TypeIndividualMale

Primary Taxonomy2086S0129X

Provider Legal NameDR. LOUIS ZHANGCredential: MD

Location Address23845 HOLMAN HWY STE 105Monterey, CA 93940-5906

Mailing Address100 Wilson Rd Ste 100Monterey, CA 93940-7885 · (831) 649-1000 · Fax (831) 649-4962

Phone(831) 333-3040

Fax(831) 886-3647

Sole ProprietorYes

Medical School CMSOtherGraduated 2015

Enumeration DateNovember 9, 2016

Last NPPES UpdateFebruary 17, 20264 updates tracked since enumeration

NPPES CertifiedFebruary 17, 2026

✔ NPI 1952843757 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Vascular SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code2086S0129X

Licenses✔ Licensed in CA · 145846✔ Licensed in WA · MD61141095✔ Licensed in ID · MC-2209

Definition

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

23845 HOLMAN HWY STE 105, Monterey, CA 93940

Open in Google Maps ↗

Secondary Practice Locations 3

Location 11075 N Curtis Rd Ste 101Boise, ID 83706-1348 · Phone (208) 302-2800 · Fax (208) 302-2825

Location 262 W 7th Ave Ste 420Spokane, WA 99204-2321 · Phone (509) 626-9440 · Fax (509) 626-9475

Location 31520 San Pablo St, HCT 4300Los Angeles, CA 90033-5310 · Phone (323) 442-9064

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Molina Healthcare, Providence Health Plan.Insurance ›

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. Louis Zhang 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 ID8527342922

PECOS Enrollment IDI20260120002413

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

Community Hospital Of The Monterey Peninsula

0.1 mi

General Acute Care Hospital

23625 HOLMAN HWY
Monterey, CA 93940

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

NPI 1225285810 (831) 624-5311

Montage Medical Group

2.8 mi

Internal Medicine

275 THE CROSSROADS BLVD STE A
Carmel, CA 93923

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

NPI 1770710709 (831) 658-3639

Saint Alphonsus Regional Medical Center Inc

562 mi

Family Medicine

712 AVIATION WAY
Caldwell, ID 83605

Reassigned Medicare billing, Idaho enrollment
781 clinicians in this Medicare group

NPI 1861676298 (208) 302-1000

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 15

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.

134 services101 patients

Complete ultrasound study of arm and leg arteries 93923

This procedure involves using sound waves to produce images of your arm and leg arteries. It helps identify blockages or abnormalities that could lead to conditions like stroke or peripheral artery disease. It's non-invasive and painless.

128 services102 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.

111 services104 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.

102 services102 patients

Ultrasound of leg arteries or artery grafts 93925

An ultrasound of leg arteries or artery grafts is a non-invasive imaging test. It uses high-frequency sound waves to capture live images from inside your body, specifically your leg arteries or grafts. This helps in detecting any blockages or abnormalities.

66 services55 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.

66 services61 patients

Ultrasound of hemodialysis access 93990

An ultrasound of hemodialysis access is a non-invasive procedure that uses sound waves to create images of your dialysis access site. It helps monitor the access site's health and detect any potential issues like blockages or narrowing.

55 services29 patients

Ultrasound of one leg arteries or artery grafts 93926

An ultrasound of leg arteries or artery grafts is a non-invasive test using sound waves to create images of your blood vessels. This helps doctors assess blood flow, identify blockages, and monitor the health of grafts.

50 services37 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

48 services46 patients

Complete ultrasound of abdomen and pelvis artery and vein blood flow 93975

This procedure uses sound waves to create images of your abdomen and pelvis, specifically focusing on the arteries and veins. It helps in assessing the blood flow and detecting any abnormalities, ensuring your overall well-being.

33 services31 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.

32 services32 patients

Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts 93978

This procedure involves using sound waves to create images of your aorta, vena cava, groin vessels, or bypass grafts. It helps to detect abnormalities or blockages, ensuring your blood flows smoothly. It's painless and non-invasive.

32 services31 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.

21 services20 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

15 services13 patients

Ultrasound of leg arteries at rest and after exercise 93924

An ultrasound of leg arteries at rest and after exercise involves using sound waves to create images of the blood vessels in your legs. This helps to detect blockages or narrowing. You'll rest, then perform light exercise, and images are taken before and after to compare blood flow.

14 services12 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Prov Sacred Hrt Med Ctr & Childs Hosp.

Acute Care Hospitals · Spokane, WA

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number500054

Location101 West 8th AvenueSpokane, WA 99204 · Spokane County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93940 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

$94.44 typical visit price

range $61.69 – $184.30

Typical copayment $23.61 (range $15.42 – $46.07)

Most-billed visit code 99203

Established Patient

$76.53 typical visit price

range $20.34 – $151.02

Typical copayment $19.13 (range $5.08 – $37.75)

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.

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 Louis Zhang's NPI number?

The NPI number for Louis Zhang is 1952843757. It was assigned to this individual provider in the NPPES registry on November 9, 2016.

Where is Louis Zhang located?

Louis Zhang practices at 23845 Holman Hwy Ste 105, Monterey, CA 93940. The listed phone number is (831) 333-3040.

What is Louis Zhang's specialty?

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

Is Louis Zhang enrolled in Medicare?

Yes. Louis Zhang 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 organizations bill Medicare for Louis Zhang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Louis Zhang reassigns Medicare benefits to 3 organizations: Community Hospital Of The Monterey Peninsula (Monterey, CA), Montage Medical Group (Carmel, CA) and Saint Alphonsus Regional Medical Center Inc (Caldwell, ID). 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 Louis Zhang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Louis Zhang accept?

Health plans from Molina Healthcare and Providence Health Plan list Louis Zhang as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Louis Zhang affiliated with any hospitals?

According to CMS data, Louis Zhang is affiliated with Prov Sacred Hrt Med Ctr & Childs Hosp..

When was this NPI record last updated?

The NPPES record for Louis Zhang was last updated on February 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.