Dr. Tanya B. Dorff, MD

  • Duarte, CA
  • Medical oncologist
NPI1508879115PAC ID4486658804
Medicare services, 2024
1,356
Medicare patients, 2024
517
Part D claims, 2024
1,464
Publications
100
Clinical trials
10
Practice address
1500 Duarte Rd, Duarte, CA 91010
Practice phone
Call (800) 826-4673
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

City of Hope Comprehensive Cancer Center - Duarte

Duarte, California

See all 5 affiliations

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Dr. Tanya B. Dorff is a medical oncologist in Duarte, California

Dr. Dorff practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California.

Dr. Dorff's NPI, 1508879115, was assigned on August 14, 2006. Dr. Dorff graduated from David Geffen School of Medicine at UCLA in 2000. Dr. Dorff holds California license A82669.

NPI and contact details
Medicare PAC ID
4486658804
NPI enumeration date
August 14, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(800) 826-4673
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Female
Estimated age
52
Medical school graduation
2000

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

Dr. Tanya B. Dorff practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California

Dr. Dorff's primary practice is City of Hope Comprehensive Cancer Center - Duarte, at 1500 Duarte Rd, Duarte, CA 91010 in Los Angeles County. The practice phone is (800) 826-4673.

  • City of Hope Comprehensive Cancer Center - Duarte
    1500 Duarte Rd, Duarte, CA 91010 · Los Angeles CountyPhone(800) 826-4673

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Tanya B. Dorff is affiliated with 4 sites of care and 1 medical group

Dr. Dorff's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. Dr. Dorff is also affiliated with Eisenhower Health. The medical group on file is City of Hope. Dmand AI also links Dr. Dorff to 1 more home health agency and 1 other site, each named with a free account.

See all 5 affiliations for Dr. Dorff

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Tanya B. Dorff's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dorff practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
City of Hope Comprehensive Cancer Center - DuarteAvailable with a free account
+3 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Tanya B. Dorff is one of 415 medical oncologists in California

Medical oncology is Dr. Dorff's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Dorff is board certified in medical oncology by the American Board of Internal Medicine. Dr. Dorff is licensed in California.

Specialties and state licenses

  • Medical oncology, CaliforniaPrimaryLicense A82669 · 2003 to 2027 · taxonomy 207RX0202X

Clinical focus

Dmand AI lists chronic anemia, fluid and electrolyte imbalances, lung cancer, multiple myeloma and prostate cancer among the conditions Dr. Dorff treats.

Medical oncologists near Dr. Dorff

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. Tanya B. Dorff billed Medicare for 1,356 services in 2024

CMS data shows 1,356 Medicare services from Dr. Dorff across 8 procedure codes in 2024, for 517 Medicare patients. Medicare paid $100,857 for them.

Medicare services, 20241,356
Medicare patients517
Paid by Medicare$100,857
Procedure codes8

Dr. Dorff's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1,3582024: 1,3094%
Other services
2023: 02024: 47

Where Dr. Dorff's Medicare services took place, 2024

  • In an office14411%
  • In a facility1,21289%

Dr. Dorff compared with the California median for medical oncologists, 2024

  • Dr. Dorff
  • California median
Medicare services
1,356vs 4962.7 times
Medicare patients
517vs 1543.4 times
Part D claims
1,242vs 1448.6 times

Medians across 358 medical oncologists in California with Dmand AI profiles that report each measure.

Dr. Dorff's 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. Dorff

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

Dr. Tanya B. Dorff treated 517 Medicare patients in 2024, average age 75

CMS counts 517 Medicare patients who saw Dr. Dorff in 2024. The largest group is 65 to 74, with 248 patients. 75% of them have cancer, and 74% have high cholesterol. 15% are also on Medicaid. Their average risk score is 2.28, 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. Dorff's median patient age at 74, with 4% women.

Medicare patients, 2024517
Average age75
Average risk score2.28
Also on Medicaid15%

Dr. Dorff's Medicare patients by age, 2024

Dr. Dorff's Medicare patients by sex, 2024

  • Women112%
  • Men50698%

Chronic conditions among Dr. Dorff's Medicare patients, 2024

  1. Cancer75%
  2. High cholesterol74%
  3. High blood pressure72%
  4. Ischemic heart disease37%
  5. Arthritis36%
  6. Diabetes31%
  7. Chronic kidney disease27%
  8. Atrial fibrillation19%

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

Dr. Dorff's patients across all payers

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

Patient panel by age, all payers

Median age 74

Patient panel by sex, all payers

  • Women4%
  • Men96%

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

Dr. Tanya B. Dorff wrote 1,464 Medicare Part D claims in 2024

In 2024, Dr. Dorff wrote 1,464 Medicare Part D claims for 204 patients. 47% of them were for generic drugs. CMS names the drug for 1,242 of them, across 15 drugs with 11 or more claims each, at $6,518,122 in total drug cost. In 2023, CMS named 1,094 claims across 18 drugs.

Part D claims, 20241,464
Drugs named by CMS15
Total drug cost$6.5M
Part D patients204

Dr. Dorff's Part D claims by kind of drug, 2024

  • Generic695 claims47%
  • Brand-name769 claims53%

Dr. Dorff's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Dorff's Part D claims, 2024

  • Opioids2%34 of 1,464 claims
  • Antibiotics1%12 of 1,464 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1,0942024: 1,24214%

Drugs named by CMS: 15 in 2024, 18 in 2023.

See all prescribing by Dr. Dorff

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Tanya B. Dorff scored 93 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Dorff for performance year 2024, reported as part of a group. Dr. Dorff accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Dorff as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Dorff's MIPS scores, performance year 2024

  • 93of 100Final score
  • 78.5of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 70of 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

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Dr. Tanya B. Dorff has 100 publications on record

Dmand AI links 100 papers to Dr. Dorff, published from 2009 to 2025. 2024 was the busiest year, with 13. The most frequent topics are Prostatic Neoplasms, Androgen Antagonists and Prostatic Neoplasms, Castration-Resistant. Dr. Dorff has published most often in Clin Genitourin Cancer. Dr. Dorff's most frequent co-authors are Sumanta K. Pal, MD, Abhishek Tripathi, MD and Rana Ramzi McKay, MD.

Papers100
Years published2009 to 2025

Dr. Dorff's papers by year, 2016 to 2025

Topics Dr. Dorff writes about most

  • Prostatic Neoplasms
  • Androgen Antagonists
  • Prostatic Neoplasms, Castration-Resistant
  • Kidney Neoplasms
  • Antineoplastic Combined Chemotherapy Protocols
  • Neoplasm Metastasis
  • Prostate-Specific Antigen
  • Carcinoma, Renal Cell

Dr. Dorff's most frequent co-authors

Recent publications by Dr. Dorff

See all 100 publications and co-authors

See who Dr. Dorff researches with

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

How network discovery works

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

Dr. Tanya B. Dorff has worked on 10 clinical trials

Dmand AI links Dr. Dorff to 10 clinical trials, 5 of them phase 2 studies. 5 are still active or recruiting. Conditions studied include Prostatic Neoplasms, Prostatic Diseases and Urinary Bladder Neoplasms. University of Southern California sponsors the most, 6.

Clinical trials with Dr. Dorff by phase

  1. 2Phase 1: 2 trials
  2. 5Phase 2: 5 trials
  3. NonePhase 3: no trials
  4. NonePhase 4: no trials

Conditions in Dr. Dorff's trials

  • Prostatic Neoplasms
  • Prostatic Diseases
  • Urinary Bladder Neoplasms
  • Carcinoma, Renal Cell

Investigators on the most trials with Dr. Dorff

Recent clinical trials with Dr. Dorff

See all 10 clinical trials and co-investigators

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

Dr. Tanya B. Dorff received $238,623 in industry payments from 2016 to 2025

CMS Open Payments shows 360 general payments to Dr. Dorff from 37 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 57% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $62,278. It also lists 36 research payments totaling $44,419 from 2020 to 2025.

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

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

$238.6Kin total
  • Consulting fees$135,30257%
  • Speaker and faculty fees$57,13024%
  • Travel and lodging$21,4239%
  • Food and beverage$11,8535%
  • Other$12,1215%

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

Share is of all general payments to this clinician.

See all payments to Dr. Dorff

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

Dr. Tanya B. Dorff has 1 award and honors on record

Dmand AI lists 1 award for Dr. Dorff, most recently Top Doctors:LA Area in 2013.

Awards and honors for Dr. Dorff

  1. 2013
    • Top Doctors:LA Area

Source: Dmand AI Professional Profile Data

Dr. Tanya B. Dorff graduated from David Geffen School of Medicine at UCLA

Dr. Dorff graduated from David Geffen School of Medicine at UCLA in 2000. Dr. Dorff is a member of ASCO.

  1. Medical schoolDavid Geffen School of Medicine at UCLA
  2. Board certified in medical oncologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Tanya B. Dorff accepts plans from 9 insurance carriers

Dr. Dorff is in network with 9 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
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • LA Care
  • Regence Health Plans
  • CMS Medicare
  • +1 more carriersWith a free account

Plan types Dr. Dorff accepts, by number of carriers

  1. Medicare8
  2. PPO6
  3. HMO4
  4. POS3
  5. EPO2
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Tanya B. Dorff'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 phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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. Tanya B. Dorff

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. Tanya B. Dorff's NPI number?

Dr. Tanya B. Dorff's NPI number is 1508879115. It was assigned on August 14, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Tanya B. Dorff?

Dr. Tanya B. Dorff is a medical oncologist in Duarte, California. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).

Where does Dr. Tanya B. Dorff practice?

Dr. Dorff practices at 1500 Duarte Rd, Duarte, CA 91010. Dr. Dorff's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. Dmand AI also links Dr. Dorff to 1 home health agency and 1 other site.

What is Dr. Tanya B. Dorff's office phone number?

The practice phone on file for Dr. Dorff is (800) 826-4673.

What is Dr. Tanya B. Dorff's medical license number?

Dr. Dorff holds California license A82669.

Which hospitals is Dr. Tanya B. Dorff affiliated with?

Dr. Dorff is affiliated with Eisenhower Health.

What medical group is Dr. Tanya B. Dorff part of?

Dr. Dorff is linked to City of Hope.

Does Dr. Tanya B. Dorff accept Medicare?

Yes. CMS data shows Dr. Dorff billed Medicare for 1,356 services in 2024, and Dr. Dorff accepts Medicare assignment.

Does Dr. Tanya B. Dorff offer telehealth?

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

What is Dr. Tanya B. Dorff's MIPS score?

Dr. Dorff's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Tanya B. Dorff see?

CMS counts 517 Medicare patients who saw Dr. Dorff in 2024, with an average age of 75.

Is Dr. Tanya B. Dorff board certified?

Yes. Dr. Dorff is board certified in medical oncology by the American Board of Internal Medicine.

What services does Dr. Tanya B. Dorff bill to Medicare?

In 2024, Dr. Dorff's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, established patient (99215).

Where did Dr. Tanya B. Dorff go to medical school?

Dr. Dorff graduated from David Geffen School of Medicine at UCLA in 2000.

What drugs does Dr. Tanya B. Dorff prescribe most?

In 2024 Medicare Part D data, Dr. Dorff's most prescribed drugs by claims were Orgovyx, Abiraterone Acetate and Nubeqa.

Has Dr. Tanya B. Dorff received payments from drug or device companies?

CMS Open Payments shows $238,623 in general payments to Dr. Dorff from 37 companies from 2016 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.

How long has Dr. Tanya B. Dorff been practicing?

Dr. Dorff graduated from medical school in 2000, 26 years ago.

Does Dr. Tanya B. Dorff do research?

Dmand AI links 100 publications to Dr. Dorff, published from 2009 to 2025. Dr. Dorff has worked on 10 clinical trials.

Who does Dr. Tanya B. Dorff publish with?

Dr. Dorff's most frequent co-authors are Sumanta K. Pal, MD (27 shared papers), Abhishek Tripathi, MD (16 shared papers) and Rana Ramzi McKay, MD (12 shared papers).

What insurance does Dr. Tanya B. Dorff accept?

Dr. Dorff is in network with 9 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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