Front Cardiovasc Med
Dr. Robert W. Decker, MD
NPI1023014164
- Medicare services, 2021
- 1,077
- Part D claims, 2021
- 408
- Publications
- 3
- Hospital affiliations
- 1
- Industry payments
- $5,646
- Practice address
- 14445 Olive View Drive, Sylmar, CA 91342
- Practice phone
- Call (818) 364-1555
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Decker's professional email, personal email and mobile number
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Dr. Robert W. Decker is a hematologist and oncologist in Sylmar, California
Dr. Decker practices at Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles.
Dr. Decker's NPI, 1023014164, was assigned on June 23, 2005. Dr. Decker graduated from UC Davis School of Medicine in 1981. Dr. Decker's California license number on file is G48876.
NPI and contact details
- NPI
- 1023014164NPI Registry (opens in a new tab)
- NPI enumeration date
- June 23, 2005
- NPI status
- Active
- Practice phone
- (818) 364-1555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Robert W. Decker practices at Olive View-UCLA Medical Center in Sylmar, California
Dr. Decker's primary practice is Olive View-UCLA Medical Center, at 14445 Olive View Drive, Sylmar, CA 91342 in Los Angeles County. The practice phone is (818) 364-1555.
- Olive View-UCLA Medical Center14445 Olive View Drive, Sylmar, CA 91342 · Los Angeles CountyPhone(818) 364-1555
Source: Dmand AI Affiliation Data
Dr. Robert W. Decker is affiliated with 2 sites of care and 2 medical groups
Dr. Decker's primary practice is Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles. The medical group on file is Harbor-UCLA Medical Center. Dmand AI also links Dr. Decker to 1 more group practice or clinic and 1 medical group, each named with a free account.
Harbor-UCLA Medical Center1 group practice or clinicName with a free account1 medical groupName with a free account
See all 4 affiliations for Dr. DeckerSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert W. Decker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Decker practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Olive View-UCLA Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert W. Decker is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Decker's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Decker is board certified in internal medicine by the American Board of Internal Medicine. Dr. Decker has a license on file in California.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
Hematologists and oncologists near Dr. Decker
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
1,502hematologists and oncologists in California10hematologists and oncologists in Sylmar8hematologists and oncologists at Olive View-UCLA Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Robert W. Decker billed Medicare for 1,077 services in 2021
CMS data shows 1,077 Medicare services from Dr. Decker across 9 procedure codes in 2021. Medicare paid $82,885 for them.
Medicare services, 20211,077
Paid by Medicare$82,885
Procedure codes9
Dr. Decker's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 1,3302021: 1,00924%
- Tests and treatments
- 2020: 1032021: 5250%
- Surgery
- 2020: 1852021: 1691%
- Lab and pathology
- 2020: 9812021: 0100%
- Other services
- 2020: 322021: 0100%
Where Dr. Decker's Medicare services took place, 2021
- In an office94488%
- In a facility13312%
Dr. Decker compared with the California median for hematologists and oncologists, 2021
- Dr. Decker
- California median
- Medicare services
- 1,077vs 93216% above
- Part D claims
- 408vs 394Close to median
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. Decker's most billed Medicare procedure codes, 2021
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. Decker and other hematologists and oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert W. Decker's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Decker's median patient age at 67, with 63% women.
Dr. Decker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women63%
- Men37%
Source: Dmand AI Patient Panel Data
Dr. Robert W. Decker wrote 408 Medicare Part D claims in 2021
In 2021, Dr. Decker wrote 408 Medicare Part D claims. They cover 21 drugs, with $863,802 in total drug cost. In 2020, CMS named 610 claims across 29 drugs.
Part D claims, 2021408
Drugs named by CMS21
Total drug cost$863,802
Dr. Decker's most prescribed drugs by claims, 2021
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 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 6102021: 40833%
Drugs named by CMS: 21 in 2021, 29 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Robert W. Decker has 3 publications on record
Dmand AI links 3 papers to Dr. Decker in 2020. Dr. Decker's most frequent co-authors are Rachel Ella Kinney, DO, Muhammad Rizvi, MD and Deborah W. Sundlof, DO.
Papers3
Dr. Decker's most frequent co-authors
- Rachel Ella Kinney, DO1 shared paper
- Muhammad Rizvi, MD1 shared paper
- Deborah W. Sundlof, DO1 shared paper
Recent publications by Dr. Decker
Cancer Treat Rep
AmsacrineAntineoplastic Combined Chemotherapy ProtocolsCytarabine
Biochim Biophys Acta
Cell NucleusDNADNA Replication
See who Dr. Decker researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Decker works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert W. Decker received $5,646 in industry payments from 2016 to 2025
CMS Open Payments shows 101 general payments to Dr. Decker from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 36% of the total. Athenex Pharmaceutical Division, LLC paid the most, $2,000.
General payments to Dr. Decker by program year, 2016 to 2025
General payments to Dr. Decker by kind, 2016 to 2025
$5.6Kin total
- Food and beverage$2,03436%
- Honoraria$2,00035%
- Consulting fees$1,60028%
- Education$120%
Companies that paid Dr. Decker 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. Robert W. Decker graduated from UC Davis School of Medicine
Dr. Decker graduated from UC Davis School of Medicine in 1981.
- Medical school
- Board certified in internal medicine
- Board certified in medical oncology
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert W. Decker'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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Robert W. Decker
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. Robert W. Decker's NPI number?
Dr. Robert W. Decker's NPI number is 1023014164. It was assigned on June 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert W. Decker?
Dr. Robert W. Decker is a hematologist and oncologist in Sylmar, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Robert W. Decker practice?
Dr. Decker practices at 14445 Olive View Drive, Sylmar, CA 91342. Dr. Decker's primary practice is Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles. Dmand AI also links Dr. Decker to 1 group practice or clinic and 1 medical group.
What is Dr. Robert W. Decker's office phone number?
The practice phone on file for Dr. Decker is (818) 364-1555.
What is Dr. Robert W. Decker's medical license number?
Dr. Decker's California license number on file is G48876.
Which hospitals is Dr. Robert W. Decker affiliated with?
Dr. Decker practices at Olive View-UCLA Medical Center in Sylmar, California.
What medical group is Dr. Robert W. Decker part of?
Dr. Decker is linked to Harbor-UCLA Medical Center. Dmand AI links Dr. Decker to 1 more medical group.
Does Dr. Robert W. Decker accept Medicare?
Yes. CMS data shows Dr. Decker billed Medicare for 1,077 services in 2021.
Is Dr. Robert W. Decker board certified?
Yes. Dr. Decker is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Robert W. Decker bill to Medicare?
In 2021, Dr. Decker's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and hospital inpatient care (99232).
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Where did Dr. Robert W. Decker go to medical school?
Dr. Decker graduated from UC Davis School of Medicine in 1981.
What drugs does Dr. Robert W. Decker prescribe most?
In 2021 Medicare Part D data, Dr. Decker's most prescribed drugs by claims were Letrozole, Potassium Chloride and Eliquis.
Has Dr. Robert W. Decker received payments from drug or device companies?
CMS Open Payments shows $5,646 in general payments to Dr. Decker from 10 companies from 2016 to 2025. The largest total came from Athenex Pharmaceutical Division, LLC.
How long has Dr. Robert W. Decker been practicing?
Dr. Decker graduated from medical school in 1981, 45 years ago.
Does Dr. Robert W. Decker do research?
Dmand AI links 3 publications to Dr. Decker.
Who does Dr. Robert W. Decker publish with?
Dr. Decker's most frequent co-authors are Rachel Ella Kinney, DO (1 shared paper), Muhammad Rizvi, MD (1 shared paper) and Deborah W. Sundlof, DO (1 shared paper).
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