Dr. Joanne B. Weidhaas, MD

  • Los Angeles, CA
  • Radiation oncologist
NPI1295723294PAC ID0244208734
Medicare services, 2024
159
Medicare patients, 2024
38
Publications
60
Clinical trials
4
MIPS score, 2024
78
Practice address
757 Westwood Plaza, Los Angeles, CA 90095
Practice phone
Call (310) 825-6301
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Ronald Reagan UCLA Medical Center

Hospital · Los Angeles, California

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Dr. Joanne B. Weidhaas is a radiation oncologist in Los Angeles, California

Dr. Weidhaas practices at Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health.

Dr. Weidhaas' NPI, 1295723294, was assigned on October 12, 2005. Dr. Weidhaas graduated from Tufts University School Of Medicine in 1999. Dr. Weidhaas' Connecticut license number on file is 042328.

NPI and contact details
Medicare PAC ID
0244208734
NPI enumeration date
October 12, 2005
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(310) 825-6301
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Female
Estimated age
53
Medical school graduation
1999

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Joanne B. Weidhaas practices at Ronald Reagan UCLA Medical Center in Los Angeles, California

Dr. Weidhaas' primary practice is Ronald Reagan UCLA Medical Center, at 757 Westwood Plaza, Los Angeles, CA 90095 in Los Angeles County. The practice phone is (310) 825-6301.

Source: Dmand AI Affiliation Data

Dr. Joanne B. Weidhaas is affiliated with 1 site of care and 1 medical group

Dr. Weidhaas' primary practice is Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health. The medical group on file is UCLA Radiation Oncology.

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Joanne B. Weidhaas' practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Weidhaas practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Ronald Reagan UCLA Medical CenterAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Joanne B. Weidhaas is one of 685 radiation oncologists in California

Radiation oncology is Dr. Weidhaas' primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Weidhaas is board certified in radiation oncology by the American Board of Radiology. Dmand AI has Dr. Weidhaas' licenses on file in 3 states: Connecticut, California and New York.

Specialties and state licenses

  • Radiation oncology, ConnecticutPrimaryLicense 042328 · 2004 to 2017 · taxonomy 2085R0001X
  • California license2015 to 2027
  • New York license2000 to 2006

Clinical focus

Dmand AI lists bone cancer radiation and breast cancer radiation among the conditions Dr. Weidhaas treats.

Radiation oncologists near Dr. Weidhaas

Counts of radiation 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. Joanne B. Weidhaas billed Medicare for 159 services in 2024

CMS data shows 159 Medicare services from Dr. Weidhaas across 6 procedure codes in 2024, for 38 Medicare patients. Medicare paid $11,749 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024159
Medicare patients38
Paid by Medicare$11,749
Procedure codes6

Dr. Weidhaas' Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Imaging
2023: 462024: 116152%
Office and hospital visits
2023: 402024: 438%

Dr. Weidhaas compared with the California median for radiation oncologists, 2024

  • Dr. Weidhaas
  • California median
Medicare services
159vs 1,44489% below
Medicare patients
38vs 16477% below

Medians across 633 radiation oncologists in California with Dmand AI profiles that report each measure.

Dr. Weidhaas' most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Weidhaas

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Joanne B. Weidhaas treated 38 Medicare patients in 2024, average age 74

CMS counts 38 Medicare patients who saw Dr. Weidhaas in 2024. The largest group is 65 to 74, with 20 patients. 75% of them have cancer, and 75% have high cholesterol. Their average risk score is 1.65, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Weidhaas' median patient age at 65, with 99% women.

Medicare patients, 202438
Average age74
Average risk score1.65

Dr. Weidhaas' Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Chronic conditions among Dr. Weidhaas' Medicare patients, 2024

  1. Cancer75%
  2. High cholesterol75%
  3. High blood pressure71%
  4. Arthritis63%
  5. Diabetes29%
  6. Osteoporosis29%

Share of Medicare patients with each condition. A patient can have several.

Dr. Weidhaas' patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 65

Patient panel by sex, all payers

  • Women99%
  • Men1%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Joanne B. Weidhaas scored 78 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 78 out of 100 for Dr. Weidhaas for performance year 2024, reported as part of a group. Dr. Weidhaas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Weidhaas as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Weidhaas' MIPS scores, performance year 2024

  • 78of 100Final score
  • 68.4of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 49of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

For MedTech and pharma teams

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Dr. Joanne B. Weidhaas has 60 publications on record

Dmand AI links 60 papers to Dr. Weidhaas, published from 2006 to 2022. 2011 was the busiest year, with 5. The most frequent topics are MicroRNAs, Breast Neoplasms and Proto-Oncogene Proteins p21(ras). Dr. Weidhaas has published most often in Cell Cycle. Dr. Weidhaas' most frequent co-authors are Rachel C. Blitzblau, MD, PhD, Adam P. Dicker, MD and Anuja Jhingran, MD.

Papers60
Years published2006 to 2022

Dr. Weidhaas' papers by year, 2010 to 2022

Topics Dr. Weidhaas writes about most

  • MicroRNAs
  • Breast Neoplasms
  • Proto-Oncogene Proteins p21(ras)
  • 3' Untranslated Regions
  • Cell Line, Tumor
  • Polymorphism, Single Nucleotide
  • Biomarkers, Tumor
  • Gene Expression Regulation, Neoplastic

Dr. Weidhaas' most frequent co-authors

Recent publications by Dr. Weidhaas

See all 60 publications and co-authors

See who Dr. Weidhaas researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Weidhaas works with, so you can find a warm path to the right radiation oncologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Joanne B. Weidhaas has worked on 4 clinical trials

Dmand AI links Dr. Weidhaas to 4 clinical trials. 2 are still active or recruiting. Conditions studied include Breast Neoplasms, Breast Diseases and Endometriosis. Yale University sponsors the most, 2.

Conditions in Dr. Weidhaas' trials

  • Breast Neoplasms
  • Breast Diseases
  • Endometriosis
  • Ovarian Neoplasms

Recent clinical trials with Dr. Weidhaas

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Joanne B. Weidhaas received $6,308 in industry payments from 2016 to 2025

CMS Open Payments shows 20 general payments to Dr. Weidhaas from 5 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 64% of the total. AstraZeneca Pharmaceuticals LP paid the most, $6,028.

General payments to Dr. Weidhaas by program year, 2016 to 2025

General payments to Dr. Weidhaas by kind, 2016 to 2025

$6.3Kin total
  • Consulting fees$4,02864%
  • Travel and lodging$1,51324%
  • Food and beverage$76712%

Companies that paid Dr. Weidhaas the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Weidhaas

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Joanne B. Weidhaas has 8 awards and honors on record

Dmand AI lists 8 awards for Dr. Weidhaas, most recently Michael Fry Research Award in 2009.

Awards and honors for Dr. Weidhaas

  1. 2009
    • Michael Fry Research Award
    • Yale Cancer Center Award, “Most Influential Paper in the Field"
  2. 2006
    • Recognition of Clinical Excellence Award
  3. 2005
    • ASTRO Travel Grant Recipient
    • Howard Hughes Medical Institute Award for Genetics in Medicine
  4. 2003
    • Gordon Research Conference Young Investigator Award
See all 8 awards

Source: Dmand AI Professional Profile Data

Dr. Joanne B. Weidhaas graduated from Tufts University School Of Medicine

Dr. Weidhaas graduated from Tufts University School Of Medicine in 1999.

  1. Medical schoolTufts University School Of Medicine
  2. Board certified in radiation oncologyAmerican Board of Radiology

Source: Dmand AI Professional Profile Data

Dr. Joanne B. Weidhaas accepts plans from 12 insurance carriers

Dr. Weidhaas is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • Alliant Health Plans
  • +4 more carriersWith a free account

Plan types Dr. Weidhaas accepts, by number of carriers

  1. Medicare8
  2. HMO7
  3. PPO7
  4. EPO4
  5. POS4

Source: Dmand AI Insurance Network Data

Sources for Dr. Joanne B. Weidhaas's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Joanne B. Weidhaas

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. Joanne B. Weidhaas' NPI number?

Dr. Joanne B. Weidhaas' NPI number is 1295723294. It was assigned on October 12, 2005, and it is active in the NPI Registry.

What kind of doctor is Dr. Joanne B. Weidhaas?

Dr. Joanne B. Weidhaas is a radiation oncologist in Los Angeles, California. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).

Where does Dr. Joanne B. Weidhaas practice?

Dr. Weidhaas practices at 757 Westwood Plaza, Los Angeles, CA 90095. Dr. Weidhaas' primary practice is Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health.

What is Dr. Joanne B. Weidhaas' office phone number?

The practice phone on file for Dr. Weidhaas is (310) 825-6301.

What is Dr. Joanne B. Weidhaas' medical license number?

Dr. Weidhaas' Connecticut license number on file is 042328, one of the licenses on file in 3 states.

Which states has Dr. Joanne B. Weidhaas been licensed in?

Dmand AI has state licenses on file for Dr. Weidhaas in Connecticut (2004 to 2017), California (2015 to 2027) and New York (2000 to 2006).

Which hospitals is Dr. Joanne B. Weidhaas affiliated with?

Dr. Weidhaas practices at Ronald Reagan UCLA Medical Center in Los Angeles, California.

What medical group is Dr. Joanne B. Weidhaas part of?

Dr. Weidhaas is linked to UCLA Radiation Oncology.

Does Dr. Joanne B. Weidhaas accept Medicare?

Yes. CMS data shows Dr. Weidhaas billed Medicare for 159 services in 2024, and Dr. Weidhaas accepts Medicare assignment.

Does Dr. Joanne B. Weidhaas offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Weidhaas as offering telehealth services.

Show 10 more questionsShow fewer questions

What is Dr. Joanne B. Weidhaas' MIPS score?

Dr. Weidhaas' MIPS final score for performance year 2024 is 78 out of 100, reported as part of a group.

How many Medicare patients does Dr. Joanne B. Weidhaas see?

CMS counts 38 Medicare patients who saw Dr. Weidhaas in 2024, with an average age of 74.

Is Dr. Joanne B. Weidhaas board certified?

Yes. Dr. Weidhaas is board certified in radiation oncology by the American Board of Radiology.

What services does Dr. Joanne B. Weidhaas bill to Medicare?

In 2024, Dr. Weidhaas' most billed Medicare services were radiation oncology (77300), radiation oncology (77334) and office visit, established patient (99213).

Where did Dr. Joanne B. Weidhaas go to medical school?

Dr. Weidhaas graduated from Tufts University School Of Medicine in 1999.

Has Dr. Joanne B. Weidhaas received payments from drug or device companies?

CMS Open Payments shows $6,308 in general payments to Dr. Weidhaas from 5 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.

How long has Dr. Joanne B. Weidhaas been practicing?

Dr. Weidhaas graduated from medical school in 1999, 27 years ago.

Does Dr. Joanne B. Weidhaas do research?

Dmand AI links 60 publications to Dr. Weidhaas, published from 2006 to 2022. Dr. Weidhaas has worked on 4 clinical trials.

Who does Dr. Joanne B. Weidhaas publish with?

Dr. Weidhaas' most frequent co-authors are Rachel C. Blitzblau, MD, PhD (3 shared papers), Adam P. Dicker, MD (3 shared papers) and Anuja Jhingran, MD (3 shared papers).

What insurance does Dr. Joanne B. Weidhaas accept?

Dr. Weidhaas is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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