Dr. Daphne Brooks Stewart, MD

  • Los Angeles, CA
  • Medical oncologist
NPI1598879918PAC ID4284650870
Medicare services, 2024
297
Medicare patients, 2024
142
Part D claims, 2024
234
Publications
6
Clinical trials
5
Practice address
1516 San Pablo St, Los Angeles, CA 90033
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Urology - Nch Urology - HOPD

Acute Care Hospital outpatient department · Los Angeles, California

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Dr. Daphne Brooks Stewart is a medical oncologist in Los Angeles, California

Dr. Stewart practices at Urology - Nch Urology - HOPD in Los Angeles, California.

Dr. Stewart's NPI, 1598879918, was assigned on August 19, 2006. Dr. Stewart graduated from Vagelos College of Physicians and Surgeons in 1998. Dr. Stewart holds California license A69829.

NPI and contact details
Medicare PAC ID
4284650870
NPI enumeration date
August 19, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
54
Medical school graduation
1998

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

Dr. Daphne Brooks Stewart practices at Urology - Nch Urology - HOPD in Los Angeles, California

Dr. Stewart's primary practice is Urology - Nch Urology - HOPD, at 1516 San Pablo St, Los Angeles, CA 90033.

  • Urology - Nch Urology - HOPD
    1516 San Pablo St, Los Angeles, CA 90033

Source: Dmand AI Affiliation Data

Dr. Daphne Brooks Stewart is affiliated with 8 sites of care and 2 medical groups

Dr. Stewart's primary practice is Urology - Nch Urology - HOPD in Los Angeles, California. Dr. Stewart is also affiliated with Los Angeles General Medical Center. The medical group on file is USC Care Medical Group. Dmand AI also links Dr. Stewart to 2 more hospitals, 2 hospital outpatient departments, 2 other sites and 1 medical group, each named with a free account.

See all 10 affiliations for Dr. Stewart

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Daphne Brooks Stewart's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stewart practices, 8 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Urology - Nch Urology - HOPDAvailable with a free account
+7 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Daphne Brooks Stewart is one of 415 medical oncologists in California

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

Specialties and state licenses

  • Medical oncology, CaliforniaPrimaryLicense A69829 · 1999 to 2027 · taxonomy 207RX0202X

Clinical focus

Dmand AI lists breast cancer, chronic leukemia, lung cancer and lymphoma among the conditions Dr. Stewart treats.

Medical oncologists near Dr. Stewart

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. Daphne Brooks Stewart billed Medicare for 297 services in 2024

CMS data shows 297 Medicare services from Dr. Stewart across 7 procedure codes in 2024, for 142 Medicare patients. Medicare paid $24,353 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024297
Medicare patients142
Paid by Medicare$24,353
Procedure codes7

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

  • 2023
  • 2024
Office and hospital visits
2023: 3302024: 28115%
Other services
2023: 02024: 16

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

  • Dr. Stewart
  • California median
Medicare services
297vs 49640% below
Medicare patients
142vs 1548% below
Part D claims
129vs 14410% below

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

Dr. Stewart'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.

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

Dr. Daphne Brooks Stewart treated 142 Medicare patients in 2024, average age 73

CMS counts 142 Medicare patients who saw Dr. Stewart in 2024. The largest group is 65 to 74, with 72 patients. 75% of them have cancer, and 75% have high blood pressure. 41% are also on Medicaid. Their average risk score is 2.40, 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. Stewart's median patient age at 52, with 70% women.

Medicare patients, 2024142
Average age73
Average risk score2.40
Also on Medicaid41%

Dr. Stewart's Medicare patients by age, 2024

Dr. Stewart's Medicare patients by sex, 2024

  • Women12286%
  • Men2014%

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

  1. Cancer75%
  2. High blood pressure75%
  3. High cholesterol74%
  4. Arthritis52%
  5. Diabetes37%
  6. Mood disorders34%
  7. Depression30%
  8. Ischemic heart disease30%

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

Dr. Stewart's patients across all payers

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

Patient panel by age, all payers

Median age 52

Patient panel by sex, all payers

  • Women70%
  • Men29%

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

Dr. Daphne Brooks Stewart wrote 234 Medicare Part D claims in 2024

In 2024, Dr. Stewart wrote 234 Medicare Part D claims for 59 patients. 94% of them were for generic drugs. CMS names the drug for 129 of them, across 5 drugs with 11 or more claims each, at $3,846 in total drug cost. In 2023, CMS named 154 claims across 5 drugs.

Part D claims, 2024234
Drugs named by CMS5
Total drug cost$3,846
Part D patients59

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

  • Generic220 claims94%
  • Brand-name14 claims6%

Dr. Stewart'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.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1542024: 12916%

Drugs named by CMS: 5 in 2024, 5 in 2023.

See all prescribing by Dr. Stewart

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. Daphne Brooks Stewart offers telehealth to Medicare patients

Dr. Stewart accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Stewart as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Daphne Brooks Stewart has 6 publications on record

Dmand AI links 6 papers to Dr. Stewart, published from 2014 to 2025. 2020 was the busiest year, with 2. Dr. Stewart's most frequent co-authors are Joanne E. Mortimer, MD, Laura Kruper, MD and Yuan Yuan, MD, PhD.

Papers6
Years published2014 to 2025

Dr. Stewart's papers by year, 2014 to 2025

Dr. Stewart's most frequent co-authors

Recent publications by Dr. Stewart

See all 6 publications and co-authors

See who Dr. Stewart researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Stewart 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. Daphne Brooks Stewart has worked on 5 clinical trials

Dmand AI links Dr. Stewart to 5 clinical trials, 2 of them phase 2 studies. 3 are still active or recruiting. Conditions studied include Breast Neoplasms, Carcinosarcoma and Endometrial Neoplasms.

Clinical trials with Dr. Stewart by phase

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

Conditions in Dr. Stewart's trials

  • Breast Neoplasms
  • Carcinosarcoma
  • Endometrial Neoplasms
  • Epilepsy
  • Ovarian Neoplasms

Investigators on the most trials with Dr. Stewart

Recent clinical trials with Dr. Stewart

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

Dr. Daphne Brooks Stewart received $2,438 in industry payments from 2016 to 2025

CMS Open Payments shows 38 general payments to Dr. Stewart from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 55% of the total. Seagen Inc. paid the most, $1,025.

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

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

$2.4Kin total
  • Food and beverage$1,34755%
  • Honoraria$90037%
  • Education$1918%

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

Share is of all general payments to this clinician.

See all payments to Dr. Stewart

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

Dr. Daphne Brooks Stewart graduated from Vagelos College of Physicians and Surgeons

Dr. Stewart graduated from Vagelos College of Physicians and Surgeons in 1998. Dr. Stewart is a member of ASCO.

  1. Medical schoolVagelos College of Physicians and Surgeons
  2. Board certified in hematologyAmerican Board of Internal Medicine
  3. Board certified in medical oncologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Daphne Brooks Stewart accepts plans from 9 insurance carriers

Dr. Stewart is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Elevance
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • CMS Medicare
  • GA State Medicaid
  • +1 more carriersWith a free account

Plan types Dr. Stewart accepts, by number of carriers

  1. Medicare7
  2. PPO6
  3. HMO3
  4. EPO2
  5. POS2
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Daphne Brooks Stewart'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 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)
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)
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. Daphne Brooks Stewart

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. Daphne Brooks Stewart's NPI number?

Dr. Daphne Brooks Stewart's NPI number is 1598879918. It was assigned on August 19, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Daphne Brooks Stewart?

Dr. Daphne Brooks Stewart is a medical oncologist in Los Angeles, California. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).

Where does Dr. Daphne Brooks Stewart practice?

Dr. Stewart practices at 1516 San Pablo St, Los Angeles, CA 90033. Dr. Stewart's primary practice is Urology - Nch Urology - HOPD in Los Angeles, California. Dmand AI also links Dr. Stewart to 2 hospitals, 2 hospital outpatient departments, 2 other sites and 1 medical group.

What is Dr. Daphne Brooks Stewart's medical license number?

Dr. Stewart holds California license A69829.

Which hospitals is Dr. Daphne Brooks Stewart affiliated with?

Dr. Stewart is affiliated with Los Angeles General Medical Center. Dmand AI links Dr. Stewart to 2 more hospitals.

What medical group is Dr. Daphne Brooks Stewart part of?

Dr. Stewart is linked to USC Care Medical Group. Dmand AI links Dr. Stewart to 1 more medical group.

Does Dr. Daphne Brooks Stewart accept Medicare?

Yes. CMS data shows Dr. Stewart billed Medicare for 297 services in 2024, and Dr. Stewart accepts Medicare assignment.

Does Dr. Daphne Brooks Stewart offer telehealth?

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

How many Medicare patients does Dr. Daphne Brooks Stewart see?

CMS counts 142 Medicare patients who saw Dr. Stewart in 2024, with an average age of 73.

Is Dr. Daphne Brooks Stewart board certified?

Yes. Dr. Stewart is board certified in hematology by the American Board of Internal Medicine.

Show 8 more questionsShow fewer questions

What services does Dr. Daphne Brooks Stewart bill to Medicare?

In 2024, Dr. Stewart's most billed Medicare services were office visit, established patient (99213), hospital inpatient care (99233) and office visit, established patient (99214).

Where did Dr. Daphne Brooks Stewart go to medical school?

Dr. Stewart graduated from Vagelos College of Physicians and Surgeons in 1998.

What drugs does Dr. Daphne Brooks Stewart prescribe most?

In 2024 Medicare Part D data, Dr. Stewart's most prescribed drugs by claims were Anastrozole, Letrozole and Gabapentin.

Has Dr. Daphne Brooks Stewart received payments from drug or device companies?

CMS Open Payments shows $2,438 in general payments to Dr. Stewart from 18 companies from 2016 to 2025. The largest total came from Seagen Inc.

How long has Dr. Daphne Brooks Stewart been practicing?

Dr. Stewart graduated from medical school in 1998, 28 years ago.

Does Dr. Daphne Brooks Stewart do research?

Dmand AI links 6 publications to Dr. Stewart, published from 2014 to 2025. Dr. Stewart has worked on 5 clinical trials.

Who does Dr. Daphne Brooks Stewart publish with?

Dr. Stewart's most frequent co-authors are Joanne E. Mortimer, MD (4 shared papers), Laura Kruper, MD (3 shared papers) and Yuan Yuan, MD, PhD (3 shared papers).

What insurance does Dr. Daphne Brooks Stewart accept?

Dr. Stewart is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.

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