RYAN HYUN WOOK JOO M.D.
NPI 1639301922
Internal Medicine - Infectious Disease in Pasadena, CA

Q: What is Ryan Joo's NPI number?

The NPI number for Ryan Joo is 1639301922. It was assigned to this individual provider in the NPPES registry on August 20, 2009.

Q: What is Ryan Joo's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Q: When was this NPI record last updated?

The NPPES record for Ryan Joo was last updated on November 1, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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 August 20, 2009PECOS EnrolledAccepts Medicare Assignment

960 E GREEN ST STE 105, PASADENA, CA 91106(626) 304-0782(626) 658-2848 Get Directions Write a Review

NPPES record last updated: November 1, 2023. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Nov 1, 2023, Jan 26, 2023 (2 updates tracked since 2023).

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About Ryan Hyun Wook Joo M.d. NPPES

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

RYAN HYUN WOOK JOO M.D. (NPI 1639301922) is an individual infectious disease provider in Pasadena, California, licensed in California (A114398) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS and is a graduate of Other (2009).

NPPES Registry Identity

NPI1639301922

Entity TypeIndividualMale

Primary Taxonomy207RI0200X

Provider Legal NameRYAN HYUN WOOK JOOCredential: M.D.

Location Address960 E GREEN ST STE 105Pasadena, CA 91106-2443

Mailing AddressPo Box 1449Brea, CA 92822-1449 · (714) 996-1633

Phone(626) 304-0782

Fax(626) 658-2848

Sole ProprietorNo

Medical School CMSOtherGraduated 2009

Enumeration DateAugust 20, 2009

Last NPPES UpdateNovember 1, 20232 updates tracked since enumeration

NPPES CertifiedOctober 31, 2023

✔ NPI 1639301922 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

License✔ Licensed in CA · A114398

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

960 E GREEN ST STE 105, Pasadena, CA 91106

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Other Identifiers 1

OtherCA121320CA · Medicare / Ptan

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

Ryan Hyun Wook Joo 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 ID6709000359

PECOS Enrollment IDI20140621000035

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.

Areas of Expertise CMS Part B claims 5

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

726 services260 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

626 services209 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

126 services124 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.

45 services19 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.

28 services22 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91106 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

100%21 patients5/55-star benchmark: 100%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…

17%86 patients1/55-star benchmark: 97%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 10

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

PRANEET KALKAT MD