DR. WEBER CHEN M.D.
NPI 1679504393
Internal Medicine - Hematology & Oncology in Pasadena, CA

Q: What is Weber Chen's NPI number?

The NPI number for Weber Chen is 1679504393. It was assigned to this individual provider in the NPPES registry on July 5, 2006.

Q: What is Weber Chen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Q: When was this NPI record last updated?

The NPPES record for Weber Chen was last updated on July 21, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since July 05, 2006PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

50 ALESSANDRO PL STE 310, PASADENA, CA 91105(626) 288-0008(866) 741-4630 Get Directions Write a Review

NPPES record last updated: July 21, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 21, 2021, Mar 27, 2020, Nov 28, 2018 and 1 more (4 updates tracked since 2018).

On this page

About Dr. Weber Chen M.d. NPPES

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

DR. WEBER CHEN M.D. (NPI 1679504393) is an individual hematology & oncology provider in Pasadena, California, licensed in California (A85444) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1998).

NPPES Registry Identity

NPI1679504393

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameDR. WEBER CHENCredential: M.D.

Location Address50 ALESSANDRO PL STE 310Pasadena, CA 91105-4000

Mailing Address541 W Colorado St, Ste 205Glendale, CA 91204-3640 · (323) 254-0046 · Fax (323) 488-9782

Phone(626) 288-0008

Fax(866) 741-4630

Sole ProprietorNo

Medical School CMSOtherGraduated 1998

Enumeration DateJuly 5, 2006

Last NPPES UpdateJuly 21, 20214 updates tracked since enumeration

NPPES CertifiedJuly 21, 2021

✔ NPI 1679504393 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

License✔ Licensed in CA · A85444

Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Also ListedSpecialistTaxonomy 174400000X · License A85444 (CA)

50 ALESSANDRO PL STE 310, Pasadena, CA 91105

Open in Google Maps ↗

Other Identifiers 1

Medicaid00A854440CA

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

Dr. Weber Chen 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 ID3779563259

PECOS Enrollment IDI20040723001092

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 35

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.

Injection, oxaliplatin, 0.5 mg J9263

Oxaliplatin is a chemotherapy drug that is administered via injection. It works by stopping cancer cells from growing and dividing, which helps in the treatment of certain types of cancer. The dosage is 0.5 mg, and it's important to follow your doctor's instructions for this treatment.

19,300 services12 patients

Injection, pembrolizumab, 1 mg J9271

Pembrolizumab is a medication given via injection to help your body's immune system fight certain types of cancer. It's typically administered in a hospital or clinic by a healthcare professional.

16,200 services14 patients

Injection, denosumab, 1 mg J0897

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

9,581 services38 patients

Injection, fosaprepitant, 1 mg J1453

Fosaprepitant is an anti-nausea medication given via injection. It's often used to prevent nausea and vomiting caused by chemotherapy. This injection blocks signals to the brain that trigger these symptoms, helping you feel better.

8,106 services11 patients

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

6,886 services57 patients

Injection, ondansetron hydrochloride, per 1 mg J2405

Ondansetron hydrochloride is a medication given via injection to help prevent nausea and vomiting, often due to chemotherapy or surgery. It works by blocking certain chemicals in the body that trigger these symptoms.

1,832 services27 patients

Injection, palonosetron hcl, 25 mcg J2469

Palonosetron HCL is an injection used to prevent nausea and vomiting caused by chemotherapy. It works by blocking a natural substance (serotonin) in the body that can cause vomiting. This helps improve your comfort during cancer treatment.

1,338 services22 patients

Assessment of emotional or behavioral problems 96127

Assessment of emotional or behavioral problems involves a thorough evaluation of your feelings, thoughts, and behaviors. It's a process where professionals study patterns over time to identify potential issues like anxiety, depression, or other mental health conditions.

1,156 services553 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.

907 services425 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.

801 services194 patients

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.

700 services304 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

673 services89 patients

Administration of chemotherapy into vein, 1 hour or less 96413

Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.

585 services71 patients

Injection, filgrastim-sndz, biosimilar, (zarxio), 1 microgram Q5101

Filgrastim-sndz, also known as Zarxio, is a biosimilar medicine administered via injection. It's designed to stimulate the growth of white blood cells, which play a crucial role in your body's defense against infections. This can be particularly beneficial if your white blood cell count is low due to certain treatments or conditions.

485 services26 patients

Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less 96367

This procedure involves injecting fluids or medication directly into your vein. It's used for treatment, prevention, or diagnosis. An additional sequential infusion may be given within an hour if needed. This helps to ensure the medicine is distributed effectively in your body.

479 services59 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.

432 services202 patients

Injection, carboplatin, 50 mg J9045

Carboplatin is a chemotherapy drug used to treat various types of cancer by slowing or stopping the growth of cancer cells. The 50 mg injection is administered into a vein by a healthcare professional. Side effects may occur.

395 services14 patients

Injection, diphenhydramine hcl, up to 50 mg J1200

Diphenhydramine HCL injection is a medicine given to alleviate symptoms of allergies, colds, or hay fever. It can also help with motion sickness and certain symptoms of Parkinson's disease. Up to 50 mg may be administered depending on your condition.

391 services58 patients

Infusion, normal saline solution, sterile (500 ml = 1 unit) J7040

An infusion of a normal saline solution is a common medical procedure. Sterile saline (salt water) is administered into your bloodstream via a drip. This helps to maintain fluid balance in your body, especially when you're unable to drink enough liquids.

300 services48 patients

Administration of additional new drug or substance into vein, 1 hour or less 96417

This procedure involves introducing a new drug or substance into your vein, typically via an IV drip. It lasts for an hour or less. This method allows the substance to quickly reach your bloodstream, ensuring rapid and effective treatment.

256 services36 patients

Administration of chemotherapy into vein, each additional hour 96415

Chemotherapy is a treatment method that uses drugs to destroy cancer cells. The drugs are administered into a vein, usually in the arm. Each additional hour of chemotherapy allows for more of the medication to enter your bloodstream to fight against the cancer cells.

249 services44 patients

Injection, zoledronic acid, 1 mg J3489

Zoledronic acid is a medication given via injection to strengthen bones. It's often used in patients with osteoporosis or certain types of cancer. The injection helps reduce the risk of fractures and other bone complications.

248 services17 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.

193 services173 patients

Infusion into a vein for hydration, each additional hour 96361

This procedure involves delivering fluids directly into your vein to keep your body hydrated. It is typically done when oral hydration is insufficient. Each additional hour means more fluid is infused to ensure adequate hydration.

184 services37 patients

Infusion into a vein for hydration, 31-60 minutes 96360

This is a procedure where a sterile solution is administered into your vein to help restore body fluid balance. It typically lasts between 31-60 minutes. It's a safe, common treatment for dehydration or to deliver medication.

139 services37 patients

Administration of hormonal anti-neoplastic chemotherapy under skin or into muscle 96402

This procedure involves the injection of hormone-based anti-cancer drugs under the skin or into a muscle. These medications help to slow down or stop the growth of certain types of cancer cells. The process is usually quick and can be performed in a clinic or hospital.

108 services16 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.

94 services94 patients

Injection, epoetin alfa, (for non-esrd use), 1000 units J0885

Epoetin alfa is a medication injected to help your body produce more red blood cells, improving energy levels and reducing tiredness. It's often used for patients with certain types of anemia. Each injection contains 1000 units of the medicine.

79 services21 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

75 services23 patients

Injection of additional new drug or substance into vein 96375

This procedure involves introducing a new medication or substance into your bloodstream via a vein. It's typically done using a small needle. The substance can help treat various conditions or assist in diagnostic procedures. It's generally safe and monitored by professionals.

65 services13 patients

Leuprolide acetate (for depot suspension), 7.5 mg J9217

Leuprolide acetate is a medication that helps regulate certain hormone levels in your body. It's injected into your muscle once a month. This treatment can help manage various health conditions related to hormone imbalance. Always follow your doctor's instructions.

62 services13 patients

Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg J3420

This is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.

49 services12 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.

14 services14 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

12 services11 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91105 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

$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.

100/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

93.72

Improvement Activities

Reported Quality Measures

Advance Care Plan

93%1,240 patients4/55-star benchmark: 100%

Breast Cancer Screening

0%704 patients1/55-star benchmark: 93%

Colorectal Cancer Screening

1%1,150 patients1/55-star benchmark: 88%

Documentation of Current Medications in the Medical Record

93%6,552 patients4/55-star benchmark: 100%

Oncology: Medical and Radiation - Pain Intensity Quantified

99%1,897 patients4/55-star benchmark: 100%

Oncology: Medical and Radiation - Plan of Care for Pain

67%261 patients2/55-star benchmark: 100%

Percentage of Patients Who Died from Cancer Receiving Systemic Cancer-Directed Therapy in the Last 14 Days of Life (lower score better)

Lower rates are better for this measure.

14%21 patients

Preventive Care and Screening: Screening for Depression and Follow-Up Plan

70%1,915 patients3/55-star benchmark: 97%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients combinedPopulations: 98% · 1,284 patients

Patients screened: 99% · 1,284 patients

73%48 patients3/55-star benchmark: 100%

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.

Referred Medical Equipment & Supplies CMS DME claims 4

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

Capecitabine, oral, 500 mg J8521

Treatment-Treatment - Miscellaneous · category RX029N

1 supplier91 claims5,494 services$0.70 avg. paid by Medicare

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

2 suppliers15 claims15 services$21.31 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511

Treatment-Chemotherapy · category RH012N

1 supplier58 claims58 services$17.71 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512

Treatment-Chemotherapy · category RH012N

1 supplier33 claims33 services$12.23 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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Other Providers at the Same Location NPPES 4

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

LOS ANGELES HEMATOLOGY-ONCOLOGY MEDICAL GROUP

Internal Medicine (Hematology & Oncology)

50 ALESSANDRO PL STE 310
PASADENA, CA 91105

Los Angeles County (626) 288-0008

XIAOXIAO WANG FNP-C

Nurse Practitioner (Family)

50 ALESSANDRO PL STE 310
PASADENA, CA 91105

Los Angeles County (626) 288-0008

DR. RONALD TANG DO

Internal Medicine (Hematology & Oncology)

50 ALESSANDRO PL STE 310
PASADENA, CA 91105

Los Angeles County (626) 288-0008

LOS ANGELES HEMATOLOGY-ONCOLOGY MEDICAL GROUP

Non-Pharmacy Dispensing Site

50 ALESSANDRO PL STE 310
PASADENA, CA 91105

Los Angeles County (323) 910-4060

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 Weber Chen's NPI number?

The NPI number for Weber Chen is 1679504393. It was assigned to this individual provider in the NPPES registry on July 5, 2006.

Where is Weber Chen located?

Weber Chen practices at 50 Alessandro Pl Ste 310, Pasadena, CA 91105. The listed phone number is (626) 288-0008.

What is Weber Chen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Weber Chen enrolled in Medicare?

Yes. Weber Chen 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.

When was this NPI record last updated?

The NPPES record for Weber Chen was last updated on July 21, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.