Antineoplastic Combined Chemotherapy ProtocolsColorectal NeoplasmsPanitumumab
Dr. Joseph Chao, MD
NPI1285831057
- Medicare services, 2022
- 493
- Part D claims, 2022
- 11
- Publications
- 126
- Clinical trials
- 17
- Industry payments
- $150,662
- Practice address
- 1500 E Duarte Road, Duarte, CA
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
City of Hope Helford Clinical Research Hospital
Duarte, California
Find Dr. Chao's professional email, personal email and mobile number
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Dr. Joseph Chao is a medical oncologist in Duarte, California
Dr. Chao practices at City of Hope Helford Clinical Research Hospital in Duarte, California.
Dr. Chao's NPI, 1285831057, was assigned on June 27, 2007. Dr. Chao graduated from University of Illinois College of Medicine - Chicago in 2004. Dr. Chao's California license number on file is A94368.
NPI and contact details
- NPI
- 1285831057NPI Registry (opens in a new tab)
- NPI enumeration date
- June 27, 2007
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Joseph Chao practices at City of Hope Helford Clinical Research Hospital in Duarte, California
Dr. Chao's primary practice is City of Hope Helford Clinical Research Hospital, at 1500 E Duarte Road, Duarte, CA.
- City of Hope Helford Clinical Research Hospital1500 E Duarte Road, Duarte, CA
Source: Dmand AI Affiliation Data
Dr. Joseph Chao is affiliated with 2 sites of care and 1 medical group
Dr. Chao's primary practice is City of Hope Helford Clinical Research Hospital in Duarte, California. The medical group on file is City of Hope. Dmand AI also links Dr. Chao to 1 more breast imaging center, named with a free account. Dr. Chao's employer is on file too.
City of Hope Helford Clinical Research HospitalPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Joseph Chao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chao practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| City of Hope Helford Clinical Research Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Joseph Chao is one of 415 medical oncologists in California
Medical oncology is Dr. Chao's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Chao has a license on file in California.
Specialties and state licenses
- Medical oncology, CaliforniaPrimary
Clinical focus
Dmand AI lists gastrointestinal inflammation among the conditions Dr. Chao treats.
Medical oncologists near Dr. Chao
Counts of medical oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Joseph Chao billed Medicare for 493 services in 2022
CMS data shows 493 Medicare services from Dr. Chao across 5 procedure codes in 2022. Medicare paid $48,315 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2022493
Paid by Medicare$48,315
Procedure codes5
Dr. Chao's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 5252022: 4936%
Dr. Chao compared with the California median for medical oncologists, 2022
- Dr. Chao
- California median
- Medicare services
- 493vs 496Close to median
- Part D claims
- 11vs 14492% below
Medians across 358 medical oncologists in California with Dmand AI profiles that report each measure.
Dr. Chao's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chao and other medical oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joseph Chao's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Chao's median patient age at 75, with 88% women.
Dr. Chao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women88%
- Men13%
Source: Dmand AI Patient Panel Data
Dr. Joseph Chao wrote 11 Medicare Part D claims in 2022
In 2022, Dr. Chao wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $215 in total drug cost. In 2020, CMS named 24 claims across 2 drugs.
Part D claims, 202211
Drugs named by CMS1
Total drug cost$215
Dr. Chao's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2022
- 2020
- 2022
- Claims for drugs CMS names
- 2020: 242022: 1154%
Drugs named by CMS: 1 in 2022, 2 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Joseph Chao has 126 publications on record
Dmand AI links 126 papers to Dr. Chao, published from 2004 to 2025. 2019 was the busiest year, with 13. The most frequent topics are Stomach Neoplasms, Adenocarcinoma and Esophageal Neoplasms. Dr. Chao has published most often in J Natl Compr Canc Netw. Dr. Chao's most frequent co-authors are Dean W. Lim, MD, Shaila Merchant, MSc, MHSC, MD and Daniel V. Catenacci.
Papers126
Years published2004 to 2025
Dr. Chao's papers by year, 2016 to 2025
Topics Dr. Chao writes about most
- Stomach Neoplasms
- Adenocarcinoma
- Esophageal Neoplasms
- Antineoplastic Combined Chemotherapy Protocols
- Esophagogastric Junction
- Antibodies, Monoclonal, Humanized
- Biomarkers, Tumor
- Neoadjuvant Therapy
Dr. Chao's most frequent co-authors
- Dean W. Lim, MD13 shared papers
- Shaila Merchant, MSc, MHSC, MD9 shared papers
- Daniel V. Catenacci8 shared papers
Recent publications by Dr. Chao
Breast NeoplasmsImmunotherapy, AdoptiveMacrophages
AdenocarcinomaAntineoplastic Combined Chemotherapy ProtocolsEsophageal Neoplasms
J Immunother Cancer
Antigens, CD19LeukemiaPathologic Complete Response
See who Dr. Chao researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chao works with, so you can find a warm path to the right medical oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Joseph Chao has worked on 17 clinical trials
Dmand AI links Dr. Chao to 17 clinical trials, 6 of them phase 1 studies. 5 are still active or recruiting. Conditions studied include Esophageal Neoplasms, Adenocarcinoma Of Esophagus and Stomach Neoplasms. City of Hope Medical Center sponsors the most, 5. Open Payments lists research payments to Dr. Chao that name 1 trial.
Clinical trials with Dr. Chao by phase
- 6Phase 1: 6 trials
- 2Phase 1/2: 2 trials
- 6Phase 2: 6 trials
- 1Phase 2/3: 1 trial
- 1Phase 3: 1 trial
- NonePhase 4: no trials
Conditions in Dr. Chao's trials
- Esophageal Neoplasms
- Adenocarcinoma Of Esophagus
- Stomach Neoplasms
- Esophageal Squamous Cell Carcinoma
- Esophageal Diseases
Investigators on the most trials with Dr. Chao
- Ari D. Baron, MD2 shared trials
- Daniel V. Catenacci2 shared trials
- Guillermo Abesada-Terk, MD1 shared trial
Recent clinical trials with Dr. Chao
A Phase 1/2 Study of Olaparib in Combination With Ramucirumab in Metastatic Gastric and Gastroesophageal Junction Adenocarcinoma (10017760) (opens in a new tab)
CompletedPhase 1/2
Stomach NeoplasmsEsophageal NeoplasmsOlaparibRamucirumab
Adenocarcinoma Of EsophagusPaclitaxelRamucirumabTrastuzumab
A Phase 2 Single-Arm Study of M6620 in Combination With Irinotecan in Patients With Progressive TP53 Mutant Gastric and Gastro-Esophageal Junction Cancer (opens in a new tab)
Active, not recruitingPhase 2
IrinotecanBerzosertib
Sarcoma, EwingOsteosarcomaINBRX-1095-fluorouracilCarboplatin
Phase I/Ib Trial of ATR Inhibitor BAY 1895344 in Combination With FOLFIRI in GI Malignancies With a Focus on Metastatic Colorectal and Gastric/Gastroesophageal Cancers (opens in a new tab)
Active, not recruitingPhase 1
Stomach NeoplasmsStomach DiseasesElimusertibFluorouracilIrinotecan Hydrochloride
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Joseph Chao received $150,662 in industry payments from 2016 to 2025
CMS Open Payments shows 142 general payments to Dr. Chao from 16 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 57% of the total. Merck Sharp & Dohme Corporation paid the most, $78,313. It also lists 1 research payment totaling $1,841 in 2016, naming 1 clinical trial.
General payments to Dr. Chao by program year, 2016 to 2025
General payments to Dr. Chao by kind, 2016 to 2025
$150.7Kin total
- Consulting fees$86,31857%
- Speaker and faculty fees$51,63534%
- Travel and lodging$8,1235%
- Food and beverage$3,6862%
- Honoraria$9001%
Companies that paid Dr. Chao the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Joseph Chao serves on 3 committees
Dr. Chao serves on Via Oncology Pathways Disease Committee, NCCN Esophageal and Esophagogastric Junction Cancers and NCCN Gastric Cancer Guidelines.
Dr. Chao's committees and leadership roles
- Via Oncology Pathways Disease CommitteeGastroesophageal Medical Oncology Co-Chair
- 2017 to present
- NCCN Esophageal and Esophagogastric Junction CancersPanel Member
- 2014 to present
- NCCN Gastric Cancer GuidelinesPanel Member
- 2014 to present
Source: Dmand AI Professional Profile Data
Dr. Joseph Chao graduated from University of Illinois College of Medicine - Chicago
Dr. Chao graduated from University of Illinois College of Medicine - Chicago in 2004. Dr. Chao is a member of AACR and ASCO.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Joseph Chao accepts plans from 3 insurance carriers
Dr. Chao is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, Elevance and Molina. POS plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Elevance
- Molina
Plan types Dr. Chao accepts, by number of carriers
- POS2
- PPO2
- EPO1
- HMO1
- Medicare1
Source: Dmand AI Insurance Network Data
Sources for Dr. Joseph Chao's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Joseph Chao
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Joseph Chao's NPI number?
Dr. Joseph Chao's NPI number is 1285831057. It was assigned on June 27, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Joseph Chao?
Dr. Joseph Chao is a medical oncologist in Duarte, California. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).
Where does Dr. Joseph Chao practice?
Dr. Chao practices at 1500 E Duarte Road, Duarte, CA. Dr. Chao's primary practice is City of Hope Helford Clinical Research Hospital in Duarte, California. Dmand AI also links Dr. Chao to 1 breast imaging center.
What is Dr. Joseph Chao's medical license number?
Dr. Chao's California license number on file is A94368.
What medical group is Dr. Joseph Chao part of?
Dr. Chao is linked to City of Hope.
Does Dr. Joseph Chao accept Medicare?
Yes. CMS data shows Dr. Chao billed Medicare for 493 services in 2022.
What services does Dr. Joseph Chao bill to Medicare?
In 2022, Dr. Chao's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and office visit, new patient (99205).
Where did Dr. Joseph Chao go to medical school?
Dr. Chao graduated from University of Illinois College of Medicine - Chicago in 2004.
What drugs does Dr. Joseph Chao prescribe most?
In 2022 Medicare Part D data, Dr. Chao's most prescribed drugs by claims were Ondansetron HCl.
Has Dr. Joseph Chao received payments from drug or device companies?
CMS Open Payments shows $150,662 in general payments to Dr. Chao from 16 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
Show 4 more questionsShow fewer questions
How long has Dr. Joseph Chao been practicing?
Dr. Chao graduated from medical school in 2004, 22 years ago.
Does Dr. Joseph Chao do research?
Dmand AI links 126 publications to Dr. Chao, published from 2004 to 2025. Dr. Chao has worked on 17 clinical trials.
Who does Dr. Joseph Chao publish with?
Dr. Chao's most frequent co-authors are Dean W. Lim, MD (13 shared papers), Shaila Merchant, MSc, MHSC, MD (9 shared papers) and Daniel V. Catenacci (8 shared papers).
What insurance does Dr. Joseph Chao accept?
Dr. Chao is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, Elevance and Molina. POS plans come from the most carriers, 2. Check the plan with the practice before a visit.
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