DR. VIVIAN HSUN-CHIEN CHOU MD
NPI 1457573420
Allergy & Immunology in Evanston, IL

NPI Status: Active since May 02, 2007

Contact Information

2500 RIDGE AVE
SUITE 211A
EVANSTON, IL
ZIP 60201
Phone: (847) 328-7909
Fax: (847) 328-7919

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  • Individual
  • Female
  • Years of Experience 24
  • Allergy & Immunology
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About VIVIAN CHOU

This page provides the complete NPI Profile along with additional information for Vivian Chou, a provider established in Evanston, Illinois with a medical specialization in Allergy & Immunology and more than 24 years of experience. She graduated from University Of Illinois College Of Med (chi/peor/rock/chm-urb) in 2002. The healthcare provider is registered in the NPI registry with number 1457573420 assigned on May 2007. The practitioner's primary taxonomy code is 207K00000X with license number 036114020 (IL). The provider is registered as an individual and her NPI record was last updated 5 years ago.

NPI
1457573420
Provider Name
DR. VIVIAN HSUN-CHIEN CHOU MD
Gender
Female
Entity Type
Individual
Location Address
2500 RIDGE AVE SUITE 211A EVANSTON, IL 60201
Location Phone
(847) 328-7909
Location Fax
(847) 328-7919
Mailing Address
2500 RIDGE AVE SUITE 211A EVANSTON, IL 60201
Mailing Phone
(847) 328-7909
Mailing Fax
(847) 328-7919
Medical School Name
UNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduation Year
2002
Is Sole Proprietor?
Yes
Enumeration Date
05-02-2007
Last Update Date
12-06-2021
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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Allergy & Immunology

Taxonomy Code
207K00000X
Type
Allopathic & Osteopathic Physicians
License No.
036114020
License State
IL
Taxonomy Description
An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

Medicare Participation & PECOS Enrollment Status

Vivian Chou is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Vivian Chou is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 1355435280

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20070921000572

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Durable Medical Equipment

  • DME-Other DME (DE017N)

    Supplies for maintenance of non-insulin drug infusion catheter, per week (list drugs separately) (HCPCS:A4221)

    1 DME suppliers used 12 Medicare Claims 12 Services Paid

Unknown

  • Treatment-Injections and Infusions (nononcologic) (RI008N)

    Injection, immune globulin (hizentra), 100 mg (HCPCS:J1559)

    1 DME suppliers used 12 Medicare Claims 7680 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 18 times for 16 patients

New patient office or other outpatient visit, 45-59 minutes

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.

This service was performed 18 times for 18 patients

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Vivian Chou is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
NORTHWESTERN MEDICINE CENTRAL DUPAGE HOSPITAL25 NORTH WINFIELD ROAD
WINFIELD, IL 60190
(630) 682-1600Acute Care Hospitals

Reviews for DR. VIVIAN HSUN-CHIEN CHOU MD

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1457573420, we treat the final digit (0) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
4
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
7
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
7
Unchanged
Pos 7
3
Doubled → 6
Pos 8
4
Unchanged
Pos 9
2
Doubled → 4
Check
0
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 5 → 10 → 1 5 → 10 → 1 3 → 6 2 → 4

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 4 + 1 + 0 + 7 + 1 + 0 + 7 + 6 + 4 + 4 + 24 = 60

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 60 is 60. The difference is the calculated check digit.

60 - 60 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1457573420.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Podiatrist
2500 RIDGE AVE, SUITE 110
EVANSTON, IL 60201
Obstetrics & Gynecology (Reproductive Endocrinology)
2500 RIDGE AVE, #200
EVANSTON, IL 60201
Dentist (Oral and Maxillofacial Surgery)
2500 RIDGE AVE, SUITE 302
EVANSTON, IL 60201
Internal Medicine
2500 RIDGE AVE, SUITE 104
EVANSTON, IL 60201
Internal Medicine
2500 RIDGE AVE, SUITE 104
EVANSTON, IL 60201
Internal Medicine
2500 RIDGE AVE, STE 210
EVANSTON, IL 60201
Internal Medicine
2500 RIDGE AVE, STE 305
EVANSTON, IL 60201
Internal Medicine
2500 RIDGE AVE, STE 210
EVANSTON, IL 60201
Podiatrist
2500 RIDGE AVE, SUITE 110
EVANSTON, IL 60201
Ophthalmology
2500 RIDGE AVE, SUITE 104
EVANSTON, IL 60201
Obstetrics & Gynecology
2500 RIDGE AVE, 210
EVANSTON, IL 60201
Social Worker (Clinical)
2500 RIDGE AVE, SUITE 305
EVANSTON, IL 60201
Dentist (General Practice)
2500 RIDGE AVE, SUITE 102
EVANSTON, IL 60201
Surgery
2500 RIDGE AVE, SUITE 107
EVANSTON, IL 60201
Specialist
2500 RIDGE AVE, SUITE 301
EVANSTON, IL 60201
Physical Therapist
2500 RIDGE AVE, SUITE 309
EVANSTON, IL 60201
Obstetrics & Gynecology
2500 RIDGE AVE, SUITE 210
EVANSTON, IL 60201
Social Worker (Clinical)
2500 RIDGE AVE, SUITE 305
EVANSTON, IL 60201
Specialist
2500 RIDGE AVE, SUITE 200
EVANSTON, IL 60201
Internal Medicine
2500 RIDGE AVE, SUITE # 210
EVANSTON, IL 60201

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1457573420, enumerated as an "individual" on May 02, 2007.

The provider is located at 2500 RIDGE AVE SUITE 211A EVANSTON, IL 60201 and the phone number is (847) 328-7909.

Allergy & Immunology with taxonomy code 207K00000X.

Vivian Chou is affiliated with: NORTHWESTERN MEDICINE CENTRAL DUPAGE HOSPITAL.