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Dr. Mark McNamara, MD
NPI1275640294
- Medicare services, 2023
- 17
- Part D claims, 2024
- 15
- Publications
- 2
- Hospital affiliations
- 1
- Industry payments
- $477
- 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. McNamara's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark McNamara is a hematologist and oncologist in Sylmar, California
Dr. McNamara practices at Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles.
Dr. McNamara's NPI, 1275640294, was assigned on August 24, 2006. Dr. McNamara graduated from Northwestern University Feinberg Medical School in 1985. Dr. McNamara holds California license G62456.
NPI and contact details
- NPI
- 1275640294NPI Registry (opens in a new tab)
- NPI enumeration date
- August 24, 2006
- NPI status
- Active
- Practice phone
- (818) 364-1555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark McNamara practices at Olive View-UCLA Medical Center in Sylmar, California
Dr. McNamara'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. Mark McNamara is affiliated with 2 sites of care and 1 medical group
Dr. McNamara's primary practice is Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles. The medical group on file is USC Care Medical Group. Dmand AI also links Dr. McNamara to 1 more group practice or clinic, named with a free account. Dr. McNamara's employer is on file too: a hospital.
USC Care Medical Group1 group practice or clinicName with a free accountEmployer: hospitalName with a free account
See all 3 affiliations for Dr. McNamaraSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark McNamara's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McNamara 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 affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark McNamara is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. McNamara's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. McNamara is licensed in California.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
Hematologists and oncologists near Dr. McNamara
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. Mark McNamara billed Medicare for 17 services in 2023
CMS data shows 17 Medicare services from Dr. McNamara across 1 procedure code in 2023, all of them office visits. Every service was in an office.
Medicare services, 202317
Procedure codes1
Dr. McNamara's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1,6242023: 1799%
Dr. McNamara compared with the California median for hematologists and oncologists, 2023
- Dr. McNamara
- California median
- Medicare services
- 17vs 93298% below
- Part D claims
- 93vs 39476% below
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. McNamara's most billed Medicare procedure codes, 2023
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. McNamara 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. Mark McNamara's patients have a median age of 77
Across all payers, Dmand AI patient panel data puts Dr. McNamara's median patient age at 77, with 47% women.
Dr. McNamara's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women47%
- Men53%
Source: Dmand AI Patient Panel Data
Dr. Mark McNamara wrote 15 Medicare Part D claims in 2024
In 2024, Dr. McNamara wrote 15 Medicare Part D claims. 80% of them were for generic drugs. They cover 5 drugs, with $241,395 in total drug cost. In 2022, CMS named 774 claims across 27 drugs.
Part D claims, 202415
Drugs named by CMS5
Total drug cost$241,395
Dr. McNamara's Part D claims by kind of drug, 2024
- Generic12 claims80%
- Brand-name and other3 claims20%
Dr. McNamara's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 7742023: 9388%
Drugs named by CMS: 5 in 2023, 27 in 2022.
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
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Dr. Mark McNamara has 2 publications on record
Dmand AI links 2 papers to Dr. McNamara, published from 2011 to 2019. Dr. McNamara's most frequent co-authors are Dean W. Lim, MD, Joseph Chao, MD and Warren A. Chow, MD.
Papers2
Years published2011 to 2019
Dr. McNamara's most frequent co-authors
Recent publications by Dr. McNamara
See who Dr. McNamara researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. McNamara 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. Mark McNamara received $477 in industry payments from 2017 to 2025
CMS Open Payments shows 21 general payments to Dr. McNamara from 6 drug and device companies from 2017 to 2025. Education make up the largest share, 61% of the total. Exelixis Inc. paid the most, $189.
General payments to Dr. McNamara by program year, 2017 to 2025
General payments to Dr. McNamara by kind, 2017 to 2025
$477in total
- Education$29161%
- Food and beverage$18639%
Companies that paid Dr. McNamara the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark McNamara graduated from Northwestern University Feinberg Medical School
Dr. McNamara graduated from Northwestern University Feinberg Medical School in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark McNamara'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)Medicare Part D Prescribers - by Provider (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. Mark McNamara
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. Mark McNamara's NPI number?
Dr. Mark McNamara's NPI number is 1275640294. It was assigned on August 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark McNamara?
Dr. Mark McNamara 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. Mark McNamara practice?
Dr. McNamara practices at 14445 Olive View Drive, Sylmar, CA 91342. Dr. McNamara's primary practice is Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles. Dmand AI also links Dr. McNamara to 1 group practice or clinic.
What is Dr. Mark McNamara's office phone number?
The practice phone on file for Dr. McNamara is (818) 364-1555.
What is Dr. Mark McNamara's medical license number?
Dr. McNamara holds California license G62456.
Which hospitals is Dr. Mark McNamara affiliated with?
Dr. McNamara practices at Olive View-UCLA Medical Center in Sylmar, California.
What medical group is Dr. Mark McNamara part of?
Dr. McNamara is linked to USC Care Medical Group.
Does Dr. Mark McNamara accept Medicare?
Yes. CMS data shows Dr. McNamara billed Medicare for 17 services in 2023.
What services does Dr. Mark McNamara bill to Medicare?
In 2023, Dr. McNamara's most billed Medicare services were office visit, established patient (99212).
Where did Dr. Mark McNamara go to medical school?
Dr. McNamara graduated from Northwestern University Feinberg Medical School in 1985.
Show 5 more questionsShow fewer questions
What drugs does Dr. Mark McNamara prescribe most?
In 2023 Medicare Part D data, Dr. McNamara's most prescribed drugs by claims were Letrozole, Tamoxifen Citrate and Eliquis.
Has Dr. Mark McNamara received payments from drug or device companies?
CMS Open Payments shows $477 in general payments to Dr. McNamara from 6 companies from 2017 to 2025. The largest total came from Exelixis Inc.
How long has Dr. Mark McNamara been practicing?
Dr. McNamara graduated from medical school in 1985, 41 years ago.
Does Dr. Mark McNamara do research?
Dmand AI links 2 publications to Dr. McNamara, published from 2011 to 2019.
Who does Dr. Mark McNamara publish with?
Dr. McNamara's most frequent co-authors are Dean W. Lim, MD (2 shared papers), Joseph Chao, MD (1 shared paper) and Warren A. Chow, MD (1 shared paper).
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