1. Home
  2. Directory
  3. California
  4. Montclair
  5. Internal Medicine
  6. NPI Profile

TIMOTHY YO WU MD
NPI 1700375656
Internal Medicine in Montclair, CA

Active since May 07, 2018PECOS EnrolledAccepts Medicare Assignment
9525 MONTE VISTA AVE # 105, MONTCLAIR, CA 91763(909) 731-2715 Get Directions Write a Review

NPPES record last updated: July 25, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 25, 2022, Jan 23, 2019, May 7, 2018 (3 updates tracked since 2018).

About Timothy Yo Wu Md NPPES

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

TIMOTHY YO WU MD (NPI 1700375656) is an individual internal medicine provider in Montclair, California, licensed in Illinois (125071848) and active in the NPI registry since May 2018. He is enrolled in Medicare PECOS and is a graduate of Other (2018).

NPPES Registry Identity

NPI1700375656
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameTIMOTHY YO WUCredential: MD
Location Address9525 MONTE VISTA AVE # 105Montclair, CA 91763-2231
Mailing Address9525 Monte Vista Ave # 105Montclair, CA 91763-2231 · (909) 731-2715
Phone(909) 731-2715
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateMay 7, 2018
Last NPPES UpdateJuly 25, 20223 updates tracked since enumeration
NPPES CertifiedJuly 14, 2022
✔ NPI 1700375656 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 125071848
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
9525 MONTE VISTA AVE # 105, Montclair, CA 91763
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Timothy Yo Wu 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 ID3577812494
PECOS Enrollment IDI20211004000616
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Timothy Wu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Inland Physicians Hospitalist Services
Same address
Hospitalist
9525 MONTE VISTA AVE STE 105
Montclair, CA 91763
  • Reassigned Medicare billing, California enrollment
  • 22 clinicians in this Medicare group
NPI 1528650223 (909) 626-1205
Inland Physicians Primary Care Services
Same address
Internal Medicine
9525 MONTE VISTA AVE STE 105
Montclair, CA 91763
  • Reassigned Medicare billing, California enrollment
  • 12 clinicians in this Medicare group
NPI 1457943151 (909) 626-1205

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

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 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.
487 services147 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.
118 services109 patients
Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes 99350
An established patient home visit is a service where a healthcare professional visits a patient's home for a check-up or treatment. The visit typically lasts for about an hour. This service is especially beneficial for patients who may have difficulty traveling to a healthcare facility.
65 services13 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
63 services60 patients
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
55 services13 patients
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.
52 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91763 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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 2

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

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers20 claims20 services$14.58 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 suppliers20 claims20 services$64.09 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

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

DR. ATIF QADEER MD
Internal Medicine
9525 MONTE VISTA AVE # 105
MONTCLAIR, CA 91763
San Bernardino County (909) 626-1205

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 Timothy Wu's NPI number?

The NPI number for Timothy Wu is 1700375656. It was assigned to this individual provider in the NPPES registry on May 7, 2018.

Where is Timothy Wu located?

Timothy Wu practices at 9525 Monte Vista Ave # 105, Montclair, CA 91763. The listed phone number is (909) 731-2715.

What is Timothy Wu's specialty?

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

Is Timothy Wu enrolled in Medicare?

Yes. Timothy Wu 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.

Which organizations bill Medicare for Timothy Wu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Wu reassigns Medicare benefits to 2 organizations: Inland Physicians Hospitalist Services (Montclair, CA) and Inland Physicians Primary Care Services (Montclair, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Timothy Wu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Timothy Wu was last updated on July 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.