DR. JOAN JOONSUN RYOO MD, MSHS
NPI 1699854596
Radiology - Therapeutic Radiology in Los Angeles, CA

NPI Status: Active since November 03, 2006

Contact Information

4950 W SUNSET BLVD
SECOND FLOOR
LOS ANGELES, CA
ZIP 90027
Phone: (323) 783-2841

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  • Individual
  • Female
  • Years of Experience 22
  • Radiology
  • Therapeutic Radiology
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About JOAN RYOO

This page provides the complete NPI Profile along with additional information for Joan Ryoo, a provider established in Los Angeles, California with a medical specialization in Radiology, focusing in therapeutic radiology and more than 22 years of experience. She graduated from Harvard Medical School in 2004. The healthcare provider is registered in the NPI registry with number 1699854596 assigned on November 2006. The practitioner's primary taxonomy code is 2085R0203X with license number A98329 (CA). The provider is registered as an individual and her NPI record was last updated 5 years ago.

NPI
1699854596
Provider Name
DR. JOAN JOONSUN RYOO MD, MSHS
Gender
Female
Entity Type
Individual
Location Address
4950 W SUNSET BLVD SECOND FLOOR LOS ANGELES, CA 90027
Location Phone
(323) 783-2841
Mailing Address
4950 W SUNSET BLVD SECOND FLOOR LOS ANGELES, CA 90027
Mailing Phone
(323) 783-2841
Medical School Name
HARVARD MEDICAL SCHOOL
Graduation Year
2004
Is Sole Proprietor?
No
Enumeration Date
11-03-2006
Last Update Date
12-01-2021
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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

Radiology Therapeutic Radiology

Taxonomy Code
2085R0203X
Type
Allopathic & Osteopathic Physicians
License No.
A98329
License State
CA
Taxonomy Description
Therapeutic Radiology certificate name was changed to Radiation Oncology. Use Radiation Oncology.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1208600000XAllopathic & Osteopathic Physicians

Surgery

221442 (MA)

Medicare Participation & PECOS Enrollment Status

Joan Ryoo 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.

Joan Ryoo 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: 9537231477

    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: I20080709000341

    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

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.

Colonoscopy

A colonoscopy is a medical procedure that allows your doctor to examine your colon (the large intestine). It utilizes a thin, flexible tube with a tiny camera on the end, which is inserted through the rectum. This procedure can help identify issues such as polyps, inflammation, or early signs of cancer. It's usually recommended for people over 50 or those with specific risk factors.

This service was performed for 81 patients

Reviews for DR. JOAN JOONSUN RYOO MD, MSHS

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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 1699854596, we treat the final digit (6) 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 84. The final step is to find the difference between that total and the next multiple of ten (90 - 84 = 6).

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
6
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
9
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
5
Unchanged
Pos 7
4
Doubled → 8
Pos 8
5
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
6
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 9 → 18 → 9 8 → 16 → 7 4 → 8 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 8 + 9 + 1 + 6 + 5 + 8 + 5 + 1 + 8 + 24 = 84

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

The next multiple of ten after 84 is 90. The difference is the calculated check digit.

90 - 84 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1699854596.

Other Providers at the Same Location


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

Pharmacist
4950 W SUNSET BLVD, PHARMACY
LOS ANGELES, CA 90027
Pharmacist
4950 W SUNSET BLVD
LOS ANGELES, CA 90027
Pharmacist
4950 W SUNSET BLVD, ROOM 280
LOS ANGELES, CA 90027
Pharmacist
4950 W SUNSET BLVD
LOS ANGELES, CA 90027
Pharmacist
4950 W SUNSET BLVD
LOS ANGELES, CA 90027
Pharmacist
4950 W SUNSET BLVD
LOS ANGELES, CA 90027
Physical Therapist
4950 W SUNSET BLVD
LOS ANGELES, CA 90027
Family Medicine
4950 W SUNSET BLVD, SCPMG LAMC FAMILY MEDICINE 4TH FLOOR
LOS ANGELES, CA 90027
Family Medicine
4950 W SUNSET BLVD, 4TH FLOOR
LOS ANGELES, CA 90027
Family Medicine
4950 W SUNSET BLVD, 4TH FLOOR, FAMILY PRACTICE
LOS ANGELES, CA 90027
Internal Medicine
4950 W SUNSET BLVD, 6TH FLOOR
LOS ANGELES, CA 90027
Radiology (Radiation Oncology)
4950 W SUNSET BLVD, 2ND FLOOR RADIATION ONCOLOGY
LOS ANGELES, CA 90027
Internal Medicine
4950 W SUNSET BLVD, DEPT OF INTERNAL MEDICINE
LOS ANGELES, CA 90027
Internal Medicine
4950 W SUNSET BLVD
LOS ANGELES, CA 90027
Family Medicine
4950 W SUNSET BLVD, 4TH FLOOR
LOS ANGELES, CA 90027
Family Medicine
4950 W SUNSET BLVD, 4TH FLOOR
LOS ANGELES, CA 90027
Internal Medicine
4950 W SUNSET BLVD, 6TH FLOOR INTERNAL MEDICINE
LOS ANGELES, CA 90027
General Acute Care Hospital
4950 W SUNSET BLVD, 6TH FLOOR
LOS ANGELES, CA 90027
Family Medicine
4950 W SUNSET BLVD, 4TH FLOOR
LOS ANGELES, CA 90027
Internal Medicine
4950 W SUNSET BLVD
LOS ANGELES, CA 90027

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1699854596, enumerated as an "individual" on November 03, 2006.

The provider is located at 4950 W SUNSET BLVD SECOND FLOOR LOS ANGELES, CA 90027 and the phone number is (323) 783-2841.

Radiology with taxonomy code 2085R0203X and a focus in Therapeutic Radiology.