WILLIAM W. TSENG M.D.
NPI 1417071242
Surgery - Surgical Oncology in Arcadia, CA

Q: What is William Tseng's NPI number?

The NPI number for William Tseng is 1417071242. It was assigned to this individual provider in the NPPES registry on March 19, 2007.

Q: What is William Tseng's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.

Q: When was this NPI record last updated?

The NPPES record for William Tseng was last updated on June 8, 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.

Active since March 19, 2007PECOS EnrolledAccepts Medicare Assignment

301 W HUNTINGTON DR STE 400, ARCADIA, CA 91007(626) 218-9840(626) 218-9860 Get Directions Write a Review

NPPES record last updated: June 8, 2022. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jun 8, 2022, Sep 13, 2020, Dec 5, 2019 and 1 more (4 updates tracked since 2017).

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About William W. Tseng M.d. NPPES

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

WILLIAM W. TSENG M.D. (NPI 1417071242) is an individual surgical oncology provider in Arcadia, California, licensed in California (A94446) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Northwestern University Feinberg Medical School (2004).

NPPES Registry Identity

NPI1417071242

Entity TypeIndividualMale

Primary Taxonomy2086X0206X

Provider Legal NameWILLIAM W. TSENGCredential: M.D.

Location Address301 W HUNTINGTON DR STE 400Arcadia, CA 91007-3471

Mailing AddressPo Box 512185Los Angeles, CA 90051-0185

Phone(626) 218-9840

Fax(626) 218-9860

Sole ProprietorNo

Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2004

Enumeration DateMarch 19, 2007

Last NPPES UpdateJune 8, 20224 updates tracked since enumeration

NPPES CertifiedJune 8, 2022

✔ NPI 1417071242 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgery · Surgical OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2086X0206X

License✔ Licensed in CA · A94446

Definition

A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.

Also ListedSurgeryTaxonomy 208600000X · License A94446 (CA)

301 W HUNTINGTON DR STE 400, Arcadia, CA 91007

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Secondary Practice Locations 2

Location 1209 Fair Oaks AveSouth Pasadena, CA 91030-1814 · Phone (626) 396-2900 · Fax (626) 799-2889

Location 21500 Duarte RdDuarte, CA 91010-3012 · Phone (626) 256-4673

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

William W. Tseng 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 ID3678751526

PECOS Enrollment IDI20140626001207

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 2

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 high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

74 services51 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

28 services28 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91007 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

$187.60 typical visit price

range $62.96 – $187.60

Typical copayment $46.90 (range $15.74 – $46.90)

Most-billed visit code 99205

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

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

MR. BEHNAM B BADIE MD

Neurological Surgery