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DR. SUSANNA ISABEL CHOU M.D.
NPI 1104889724
Family Medicine in Chula Vista, CA

Active since April 07, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 05D2306846 · Microscopy
340 4TH AVENUE, SUITE 5A, CHULA VISTA, CA 91910(619) 425-5559(619) 425-5588 Get Directions Write a Review

NPPES record last updated: January 20, 2010. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Susanna Isabel Chou M.d. NPPES

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

DR. SUSANNA ISABEL CHOU M.D. (NPI 1104889724) is an individual family medicine provider in Chula Vista, California, licensed in California (A73158) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS, holds a CLIA Microscopy certificate valid through June 24, 2028, and is a graduate of Harvard Medical School (1999).

NPPES Registry Identity

NPI1104889724
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. SUSANNA ISABEL CHOUCredential: M.D.
Location Address340 4TH AVENUE, SUITE 5AChula Vista, CA 91910-3813
Mailing Address374 E H St, Suite A, Pmb-105Chula Vista, CA 91910-7484 · (619) 425-5559 · Fax (619) 425-5588
Phone(619) 425-5559
Fax(619) 425-5588
Sole ProprietorYes
Medical School CMSHarvard Medical SchoolGraduated 1999
Enumeration DateApril 7, 2006
Last NPPES UpdateJanuary 20, 2010
✔ NPI 1104889724 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A73158
Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

340 4TH AVENUE, Chula Vista, CA 91910
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Other Identifiers 3

Medicare ID-Type UnspecifiedWA73158A
Medicaid00A731580CA
Medicare UPINH77976

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

Dr. Susanna Isabel Chou M.d. 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 ID6709770456
PECOS Enrollment IDI20040212000238
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 05D2306846

Susanna I Chou MD · Chula Vista, CA
Active · expires Jun 24, 2028
CLIA Number05D2306846
Laboratory TypePhysician Office
Certificate Effective DateJune 25, 2026
Certificate Expiration DateJune 24, 2028
Laboratory DirectorSusanna I. Chou
Laboratory Phone(619) 425-5559
Laboratory LocationSusanna I Chou MD340 4th Ave #12, Chula Vista, CA 91910
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

Areas of Expertise CMS Part B claims 10

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 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.
295 services92 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
55 services55 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.
49 services38 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
45 services45 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
44 services44 patients
Hemoglobin a1c level 83036
Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
23 services19 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91910 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
$94.87 typical visit price
range $62.10 – $184.71
Typical copayment $23.71 (range $15.52 – $46.17)
Most-billed visit code 99203
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 6

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
9 suppliers25 claims109 services$6.12 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
7 suppliers21 claims49 services$1.06 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers13 claims13 services$14.89 avg. paid by Medicare
Home ventilator, any type, used with invasive interface, (e.g., tracheostomy tube) E0465
DME-Other DME · category DE005N
1 supplier12 claims12 services$768.64 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers17 claims17 services$55.75 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
4 suppliers45 claims45 services$184.97 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Susanna Chou's NPI number?

The NPI number for Susanna Chou is 1104889724. It was assigned to this individual provider in the NPPES registry on April 7, 2006.

Where is Susanna Chou located?

Susanna Chou practices at 340 4th Avenue Suite 5A, Chula Vista, CA 91910. The listed phone number is (619) 425-5559.

What is Susanna Chou's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Susanna Chou enrolled in Medicare?

Yes. Susanna Chou 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.

Does Susanna Chou hold a CLIA laboratory certificate?

Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 05D2306846) is associated with this NPI, valid through June 24, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Susanna Chou was last updated on January 20, 2010. NPI Profile syncs with the weekly NPPES data releases published by CMS.