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WOOJIN JOO MD
NPI 1780110338
Internal Medicine in Los Angeles, CA

Active since May 02, 2017PECOS EnrolledAccepts Medicare AssignmentCLIA 05D2312683 · Waiver
3511 W OLYMPIC BLVD STE 202, LOS ANGELES, CA 90019(310) 294-8090(310) 294-5343 Get Directions Write a Review

NPPES record last updated: September 9, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 9, 2025, Jun 19, 2024, Jan 19, 2021 (3 updates tracked since 2021).

About Woojin Joo Md NPPES

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

WOOJIN JOO MD (NPI 1780110338) is an individual internal medicine provider in Los Angeles, California, licensed in California (A160312) and active in the NPI registry since May 2017. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through October 15, 2026, and is a graduate of St. Louis College Of Physicians And Surgeons (2017).

NPPES Registry Identity

NPI1780110338
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWOOJIN JOOCredential: MD
Location Address3511 W OLYMPIC BLVD STE 202Los Angeles, CA 90019-3563
Mailing Address3511 W Olympic Blvd Ste 202Los Angeles, CA 90019-3563 · (310) 294-8090 · Fax (310) 294-5343
Phone(310) 294-8090
Fax(310) 294-5343
Sole ProprietorYes
Medical School CMSSt. Louis College Of Physicians And SurgeonsGraduated 2017
Enumeration DateMay 2, 2017
Last NPPES UpdateSeptember 9, 20253 updates tracked since enumeration
NPPES CertifiedSeptember 9, 2025
✔ NPI 1780110338 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A160312
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

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

Woojin Joo 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 ID1355755760
PECOS Enrollment IDI20210126002884
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 of Waiver 05D2312683

Woojin Joo MD PC · Los Angeles, CA
Active · expires Oct 15, 2026
CLIA Number05D2312683
Laboratory TypePhysician Office
Certificate Effective DateOctober 16, 2024
Certificate Expiration DateOctober 15, 2026
Laboratory DirectorWoojin Joo
Laboratory Phone(310) 294-8090
Laboratory LocationWoojin Joo MD PC903 Crenshaw Blvd Suite 101, Los Angeles, CA 90019
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 9

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.
100 services84 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
79 services72 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
68 services61 patients
Telephone medical discussion with physician, 5-10 minutes 99441
A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.
56 services41 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.
44 services23 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.
29 services29 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90019 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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 5

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
15 suppliers43 claims108 services$6.48 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
11 suppliers37 claims46 services$1.13 avg. paid by Medicare
For diabetics only, fitting (including follow-up), custom preparation and supply of off-the-shelf depth-inlay shoe manufactured to accommodate multi-density insert(s), per shoe A5500
DME-Orthotic Devices · category DF000N
5 suppliers13 claims26 services$58.55 avg. paid by Medicare
For diabetics only, multiple density insert, direct formed, molded to foot after external heat source of 230 degrees fahrenheit or higher, total contact with patient's foot, including arch, base layer minimum of 1/4 inch material of shore a 35 durometer or 3/16 inch material of shore a 40 durometer (or higher), prefabricated, each A5512
DME-Orthotic Devices · category DF000N
5 suppliers13 claims78 services$25.03 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
2 suppliers22 claims22 services$184.95 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KANG & LEE CHIROPRACTIC INC
Chiropractor
3511 W OLYMPIC BLVD STE 202
LOS ANGELES, CA 90019
Los Angeles County (323) 732-8343
KYUNG YI KANG D.C
Chiropractor
3511 W OLYMPIC BLVD STE 202
LOS ANGELES, CA 90019
Los Angeles County (323) 732-8343
WOOJIN JOO MD PC
Internal Medicine
3511 W OLYMPIC BLVD STE 202
LOS ANGELES, CA 90019
Los Angeles County (310) 294-8090

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 Woojin Joo's NPI number?

The NPI number for Woojin Joo is 1780110338. It was assigned to this individual provider in the NPPES registry on May 2, 2017.

Where is Woojin Joo located?

Woojin Joo practices at 3511 W Olympic Blvd Ste 202, Los Angeles, CA 90019. The listed phone number is (310) 294-8090.

What is Woojin Joo's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Woojin Joo enrolled in Medicare?

Yes. Woojin Joo 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 Woojin Joo hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D2312683) is associated with this NPI, valid through October 15, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Woojin Joo was last updated on September 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.