Dr. Wei Chia Chen , MD
Internal Medicine • San Jose, CA
751 S Bascom Ave, Int Med
San Jose, CA 951282604
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on December 10, 2007; this date does not establish years in practice.
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Published CMS data list 616 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99291 — Critical care: 203 service units.
- 99214 — Established patient outpatient office visit: 196 service units.
- 99232 — Subsequent hospital care with moderate levelof medical decision making: 43 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 9 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 706 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Albuterol Sulfate Hfa (Albuterol Sulfate) — 87 prescription fills, including refills.
- Breo Ellipta (Fluticasone/Vilanterol) — 71 prescription fills, including refills.
- Montelukast Sodium — 54 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 26 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Internal Medicine in San Jose, CA (2024, 171 clinicians with data). Median for this group: 403. Middle half: 128 to 798.
Close to the middle for Medicare Part B services among clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: 547. Middle half: 197 to 1,242.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 536 in 2020 to 616 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
751 S Bascom Ave
Int Med
San Jose, CA 951282604
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: County Of Santa Clara. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of California, San Diego School Of Medicine
2005
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
298 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $80,066 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $61,210 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
839 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$598,527 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $21.83 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
21 years (graduated 2005)
CMS Doctors and Clinicians data list 2005 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Chen has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Chen as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in San Jose and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Internal Medicine in San Jose, CA (2024, 171 clinicians with data). Median for this group: 403. Middle half: 128 to 798.
Close to the middle for clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: 547. Middle half: 197 to 1,242.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Internal Medicine in San Jose, CA (2024, 171 clinicians with data). Median for this group: $43,649. Middle half: $13,161 to $88,587.
A higher Medicare-allowed amount than 60% of clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: $57,391. Middle half: $20,415 to $125,751.
Paid by Medicare
A higher Medicare payment amount than 70% of clinicians listed under Internal Medicine in San Jose, CA (2024, 171 clinicians with data). Median for this group: $33,141. Middle half: $9,599 to $68,069.
A higher Medicare payment amount than 60% of clinicians listed under Internal Medicine in California (2024, 8,005 clinicians with data). Median for this group: $43,431. Middle half: $14,887 to $95,905.
Medicare Part D prescriptions
Fewer Part D prescriptions than 60% of clinicians listed under Internal Medicine in San Jose, CA (2024, 268 clinicians with data). Median for this group: 1,484. Middle half: 231 to 4,512.
Close to the middle for clinicians listed under Internal Medicine in California (2024, 10,795 clinicians with data). Median for this group: 1,254. Middle half: 150 to 4,240.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in San Jose, CA (2024, 268 clinicians with data). Median for this group: $92,518. Middle half: $8,948 to $251,700.
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in California (2024, 10,795 clinicians with data). Median for this group: $88,105. Middle half: $7,557 to $307,080.
429 active clinicians are listed under Internal Medicine with a practice address in San Jose, CA (17,717 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in San Jose
18.9% of these 429 clinicians have the CMS telehealth indicator.
64.1% of these 429 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 15% from 536 in 2020 to 616 in 2024.
- 2020: 536
- 2021: 443
- 2022: 437
- 2023: 497
- 2024: 616
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $79,091 in 2020 and $80,066 in 2024.
- 2020: $79,091
- 2021: $67,812
- 2022: $56,004
- 2023: $67,391
- 2024: $80,066
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Paid by Medicare
Paid by Medicare stayed about the same: $66,818 in 2020 and $61,210 in 2024.
- 2020: $66,818
- 2021: $57,963
- 2022: $45,531
- 2023: $52,354
- 2024: $61,210
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 39% from 507 in 2020 to 706 in 2024.
- 2020: 507
- 2021: 456
- 2022: 444
- 2023: 569
- 2024: 706
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30-day fills
30-day fills increased 36% from 618 in 2020 to 839 in 2024.
- 2020: 618
- 2021: 565
- 2022: 555
- 2023: 707
- 2024: 839
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Part D drug cost
Part D drug cost increased 322% from $141,832 in 2020 to $598,527 in 2024.
- 2020: $141,832
- 2021: $315,848
- 2022: $112,935
- 2023: $798,269
- 2024: $598,527
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $21.83.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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UPTRAVI | General | $21.83 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99291
Critical care, first 30-74 minutes
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203 | 70 | $2098.79 | $234.43 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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196 | 115 | $754.99 | $110.73 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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43 | 38 | $704.30 | $89.15 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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39 | 37 | $493.38 | $74.94 |
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94729
Test to examine how well the lungs exchange gases
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38 | 38 | $104.97 | $9.86 |
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94726
Test to determine lung volumes using sensors
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35 | 35 | $141.60 | $13.33 |
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94060
Test to measure expiratory airflow and volume changes before and after medication administration
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24 | 24 | $149.63 | $11.42 |
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94010
Test to measure expiratory airflow and volume
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20 | 20 | $97.75 | $9.13 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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18 | 18 | $752.06 | $151.07 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Albuterol Sulfate Hfa | Albuterol Sulfate | 87 | 2,177 | $3,238.52 | 35 |
| Breo Ellipta | Fluticasone/Vilanterol | 71 | 2,130 | $24,212.28 | 14 |
| Montelukast Sodium | Montelukast Sodium | 54 | 2,190 | $224.94 | 14 |
| Azithromycin | Azithromycin | 48 | 1,500 | $421.82 | 15 |
| Incruse Ellipta | Umeclidinium Bromide | 46 | 1,620 | $17,516.53 | 13 |
| Ventolin Hfa | Albuterol Sulfate | 41 | 818 | $2,237.53 | — |
| Spiriva Handihaler | Tiotropium Bromide | 39 | 1,350 | $21,603.79 | — |
| Ofev | Nintedanib Esylate | 29 | 870 | $348,891.61 | — |
| Dupixent Syringe | Dupilumab | 24 | 700 | $82,386.66 | — |
| Omeprazole | Omeprazole | 23 | 1,260 | $89.53 | — |
| Furosemide | Furosemide | 22 | 825 | $44.92 | — |
| Combivent Respimat | Ipratropium/Albuterol Sulfate | 22 | 585 | $9,551.50 | — |
| Spiriva Respimat | Tiotropium Bromide | 21 | 690 | $10,331.69 | — |
| Fluticasone Propionate Hfa | Fluticasone Propionate | 21 | 630 | $5,659.38 | — |
| Prednisone | Prednisone | 20 | 661 | $88.69 | 13 |
| Pantoprazole Sodium | Pantoprazole Sodium | 19 | 570 | $57.50 | — |
| Gabapentin | Gabapentin | 15 | 640 | $159.16 | — |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 13 | 390 | $2,519.10 | — |
| Wixela Inhub | Fluticasone Propion/Salmeterol | 13 | 570 | $1,952.66 | — |
| Stiolto Respimat | Tiotropium Br/Olodaterol Hcl | 12 | 390 | $5,591.16 | — |
| Fluticasone Propionate | Fluticasone Propionate | 11 | 690 | $89.34 | — |
| Dulera | Mometasone/Formoterol | 11 | 450 | $3,225.66 | — |
| Arnuity Ellipta | Fluticasone Furoate | 11 | 375 | $3,533.55 | — |
| Nucala | Mepolizumab | 11 | 308 | $38,746.69 | — |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 11 | 330 | $6,309.71 | — |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20110809000613
CA
4981873924
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
County Of Santa Clara
751 S Bascom Ave, San Jose, CA 951282604
Phone: 4088855000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Anesthesiology
Doctor of Medicine (M.D.)
Specialist/Technologist, Health Information - Coding Specialist, Physician Office Based
Internal Medicine
Doctor of Medicine (M.D.)
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated December 10, 2007.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Internal Medicine Providers in San Jose
- Dr. Srijana Davuluri, MBBS
- Dr. Malathi Charlu, MD
- Dr. Alexander Korsunsky, MD
- Julia Tong
- Dr. Denise Massey, MD
- Dr. Namrata Sajwan, MD
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Directory navigation, in NPI number order.
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Mailing Address
751 S Bascom Ave, Int Med
San Jose, CA 951282604
Phone: 4088855000