Dr. John M. Mason, DO
- Part D claims, 2024
- 90
- Hospital affiliations
- 1
- Industry payments
- $26,737
- Medical group
- 1
- State license
- 1
- Practice address
- 8700 Beverly Blvd, Los Angeles, CA 90048
- Practice phone
- Call (310) 423-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mason'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. John M. Mason is a neurologist in West Hollywood, California
Dr. Mason practices at Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System.
Dr. Mason's NPI, 1467039651, was assigned on March 25, 2021. Dr. Mason holds California license 20A23754.
- NPI
- 1467039651NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436551249
- NPI enumeration date
- March 25, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 423-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John M. Mason practices at Cedars-Sinai Medical Center in Los Angeles, California
Dr. Mason's primary practice is Cedars-Sinai Medical Center, at 8700 Beverly Blvd, Los Angeles, CA 90048 in Los Angeles County. The practice phone is (310) 423-5000.
- Cedars-Sinai Medical Center8700 Beverly Blvd, Los Angeles, CA 90048 · Los Angeles CountyPhone(310) 423-5000
Source: Dmand AI Affiliation Data
Dr. John M. Mason is affiliated with 2 sites of care and 1 medical group
Dr. Mason's primary practice is Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System. The medical group on file is Cedars-Sinai Medical Center. Dmand AI also links Dr. Mason to 1 more home health agency, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John M. Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mason practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cedars-Sinai Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Cedars-Sinai Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John M. Mason is one of 2,207 neurologists in California
Neurology is Dr. Mason's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Mason is licensed in California.
Specialties and state licenses
- Neurology, CaliforniaPrimary
Neurologists near Dr. Mason
Counts of neurologists 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. John M. Mason's patients have a median age of 76
Across all payers, Dmand AI patient panel data puts Dr. Mason's median patient age at 76, with 40% women.
Dr. Mason's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women40%
- Men60%
Source: Dmand AI Patient Panel Data
Dr. John M. Mason wrote 90 Medicare Part D claims in 2024
In 2024, Dr. Mason wrote 90 Medicare Part D claims for 21 patients. 98% of them were for generic drugs. CMS names the drug for 38 of them, across 2 drugs with 11 or more claims each, at $1,810 in total drug cost.
Dr. Mason's Part D claims by kind of drug, 2024
- Generic88 claims98%
- Brand-name and other2 claims2%
Dr. Mason'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.
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
How Dr. John M. Mason takes part in Medicare
Dr. Mason accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Dr. John M. Mason received $26,737 in industry payments in 2025
CMS Open Payments shows 24 general payments to Dr. Mason from 4 drug and device companies in 2025. Grants make up the largest share, 94% of the total. Boston Scientific Corporation paid the most, $10,199.
General payments to Dr. Mason by kind, 2025 to 2025
- Grants$25,00094%
- Food and beverage$9333%
- Travel and lodging$8043%
Companies that paid Dr. Mason the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John M. Mason'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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. John M. Mason
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. John M. Mason's NPI number?
Dr. John M. Mason's NPI number is 1467039651. It was assigned on March 25, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. John M. Mason?
Dr. John M. Mason is a neurologist in West Hollywood, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. John M. Mason practice?
Dr. Mason practices at 8700 Beverly Blvd, Los Angeles, CA 90048. Dr. Mason's primary practice is Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System. Dmand AI also links Dr. Mason to 1 home health agency.
What is Dr. John M. Mason's office phone number?
The practice phone on file for Dr. Mason is (310) 423-5000.
What is Dr. John M. Mason's medical license number?
Dr. Mason holds California license 20A23754, one of 2 state licenses on file.
Which hospitals is Dr. John M. Mason affiliated with?
Dr. Mason practices at Cedars-Sinai Medical Center in Los Angeles, California.
What medical group is Dr. John M. Mason part of?
Dr. Mason is linked to Cedars-Sinai Medical Center.
Does Dr. John M. Mason accept Medicare?
Yes. CMS lists Dr. Mason as accepting Medicare assignment.
What drugs does Dr. John M. Mason prescribe most?
In 2024 Medicare Part D data, Dr. Mason's most prescribed drugs by claims were Levetiracetam and Mycophenolate Mofetil.
Has Dr. John M. Mason received payments from drug or device companies?
CMS Open Payments shows $26,737 in general payments to Dr. Mason from 4 companies from 2025 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. John M. Mason been practicing?
Dr. Mason graduated from medical school in 2021, 5 years ago.
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