DR. WILL TSENG M.D.
NPI 1013176213
Internal Medicine - Critical Care Medicine in San Jose, CA

Q: What is Will Tseng's NPI number?

The NPI number for Will Tseng is 1013176213. It was assigned to this individual provider in the NPPES registry on June 3, 2008.

Q: What is Will Tseng's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Q: When was this NPI record last updated?

The NPPES record for Will Tseng was last updated on August 18, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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 June 03, 2008PECOS EnrolledAccepts Medicare Assignment

2520 SAMARITAN DR, SUITE 210, SAN JOSE, CA 95124(408) 356-8400(408) 356-0974 Get Directions Write a Review

NPPES record last updated: August 18, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Will Tseng M.d. NPPES

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

DR. WILL TSENG M.D. (NPI 1013176213) is an individual critical care medicine provider in San Jose, California, licensed in California (A105896) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS and is a graduate of Geisel School Of Medicine At Dartmouth (2007).

NPPES Registry Identity

NPI1013176213

Entity TypeIndividualMale

Primary Taxonomy207RC0200X

Provider Legal NameDR. WILL TSENGCredential: M.D.

Location Address2520 SAMARITAN DR, SUITE 210San Jose, CA 95124-4106

Mailing AddressPo Box 1869Los Gatos, CA 95031-1869 · (408) 356-8400 · Fax (408) 356-0974

Phone(408) 356-8400

Fax(408) 356-0974

Sole ProprietorYes

Medical School CMSGeisel School Of Medicine At DartmouthGraduated 2007

Enumeration DateJune 3, 2008

Last NPPES UpdateAugust 18, 2016

✔ NPI 1013176213 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RC0200X

License✔ Licensed in CA · A105896

Definition

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Also ListedInternal MedicineTaxonomy 207R00000X · License A105896 (CA)

Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License A105896 (CA)

2520 SAMARITAN DR, San Jose, CA 95124

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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

Dr. Will 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 ID7810011103

PECOS Enrollment IDI20100823001045

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 Reassignment

Medicare enrollment records show Will Tseng reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation

0.1 mi

Ambulatory Surgical

2581 SAMARITAN DR, SUITE 308
San Jose, CA 95124

Reassigned Medicare billing, California enrollment
Also billed through NPI 1013950807 (California)
393 clinicians in this Medicare group

NPI 1043654486 (408) 876-4800

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 12

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.

322 services176 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.

274 services170 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

159 services156 patients

Test to determine lung volumes using sensors 94726

This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.

157 services154 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

146 services144 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

97 services40 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.

55 services55 patients

Critical care, each additional 30 minutes 99292

Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.

46 services22 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.

39 services17 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

38 services38 patients

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212

This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.

16 services14 patients

Test to measure expiratory airflow and volume 94010

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95124 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

$156.67 typical visit price

range $70.37 – $206.04

Typical copayment $39.16 (range $17.59 – $51.51)

Most-billed visit code 99204

Established Patient

$121.77 typical visit price

range $23.96 – $169.60

Typical copayment $30.44 (range $5.99 – $42.40)

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 12

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

4 suppliers55 claims55 services$12.96 avg. paid by Medicare

Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466

DME-Other DME · category DE005N

1 supplier15 claims15 services$781.93 avg. paid by Medicare

High frequency chest wall oscillation system, with full anterior and/or posterior thoracic region receiving simultaneous external oscillation, includes all accessories and supplies, each E0483

DME-Other DME · category DE000N

2 suppliers33 claims33 services$833.88 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

2 suppliers63 claims63 services$2.61 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

6 suppliers178 claims178 services$58.03 avg. paid by Medicare

Portable oxygen concentrator, rental E1392

DME-Oxygen and Supplies · category DC002N

5 suppliers111 claims111 services$30.70 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 5

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

S. J. SALFEN M.D, A PROFESSIONAL CORPORATION

Internal Medicine (Critical Care Medicine)

2520 SAMARITAN DR, SUITE 210
SAN JOSE, CA 95124

Santa Clara County (408) 356-8400

MARWAN A BALAA MD INC

Internal Medicine (Gastroenterology)

2520 SAMARITAN DR, SUITE 201
SAN JOSE, CA 95124

Santa Clara County (408) 402-9990

DR. SJ SALFEN M.D.

Internal Medicine (Pulmonary Disease)

2520 SAMARITAN DR, SUITE 210
SAN JOSE, CA 95124

Santa Clara County (408) 356-8400

DR. MARWAN A BALAA MD

Internal Medicine (Gastroenterology)

2520 SAMARITAN DR, #201
SAN JOSE, CA 95124

Santa Clara County (408) 402-9990

NEUROSCIENCE INSTITUTE OF NORTHERN CALIFORNIA

Internal Medicine (Pulmonary Disease)

2520 SAMARITAN DR, SUITE 210
SAN JOSE, CA 95124

Santa Clara County (408) 356-8400

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 Will Tseng's NPI number?

The NPI number for Will Tseng is 1013176213. It was assigned to this individual provider in the NPPES registry on June 3, 2008.

Where is Will Tseng located?

Will Tseng practices at 2520 Samaritan Dr Suite 210, San Jose, CA 95124. The listed phone number is (408) 356-8400.

What is Will Tseng's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is Will Tseng enrolled in Medicare?

Yes. Will Tseng 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 organization bills Medicare for Will Tseng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Will Tseng reassigns Medicare benefits to Sutter Bay Medical Foundation (San Jose, CA). The 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 Will Tseng'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 Will Tseng was last updated on August 18, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.