Dr. John Dawson Mason, MD
- Medicare services, 2024
- 38
- Medicare patients, 2024
- 41
- Part D claims, 2024
- 70
- Hospital affiliations
- 3
- Industry payments
- $14
- Practice address
- 2500 W Utopia Rd, Phoenix, AZ 85027
- Practice phone
- Call (480) 784-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
HonorHealth
Phoenix, Arizona
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 Dawson Mason is an emergency medicine physician in Phoenix, Arizona
Dr. Mason practices at HonorHealth in Phoenix, Arizona.
Dr. Mason's NPI, 1023090099, was assigned on November 16, 2005. Dr. Mason holds Arizona license 31338.
- NPI
- 1023090099NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426944083
- NPI enumeration date
- November 16, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 784-5500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- 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. John Dawson Mason practices at HonorHealth in Phoenix, Arizona
Dr. Mason's primary practice is HonorHealth, at 2500 W Utopia Rd, Phoenix, AZ 85027 in Maricopa County. The practice phone is (480) 784-5500.
- HonorHealth2500 W Utopia Rd, Phoenix, AZ 85027 · Maricopa CountyPhone(480) 784-5500
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Dawson Mason is affiliated with 4 sites of care and 10 medical groups
Dr. Mason's primary practice is HonorHealth in Phoenix, Arizona. Dr. Mason is also affiliated with HonorHealth Tempe Medical Center. The medical group on file is TEC Emergency Physicians of Arizona. Dmand AI also links Dr. Mason to 2 more hospitals and 9 medical groups, each named with a free account.
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. John Dawson Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mason practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HonorHealth | Available with a free account |
| +3 more sites and 9 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Dawson Mason is one of 1,360 emergency medicine physicians in Arizona
Emergency medicine is Dr. Mason's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Mason is licensed in Arizona.
Specialties and state licenses
- Emergency medicine, ArizonaPrimary
Emergency medicine physicians near Dr. Mason
Counts of emergency medicine physicians 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 Dawson Mason billed Medicare for 38 services in 2024
CMS data shows 38 Medicare services from Dr. Mason across 2 procedure codes in 2024, for 41 Medicare patients. Medicare paid $4,036 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mason's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 252024: 3852%
Dr. Mason compared with the Arizona median for emergency medicine physicians, 2024
- Dr. Mason
- Arizona median
- Medicare services
- 38vs 21682% below
- Medicare patients
- 41vs 21080% below
- Part D claims
- 14vs 5072% below
Medians across 1,326 emergency medicine physicians in Arizona with Dmand AI profiles that report each measure.
Dr. Mason'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. John Dawson Mason treated 41 Medicare patients in 2024, average age 68
CMS counts 41 Medicare patients who saw Dr. Mason in 2024. The largest group is 65 to 74, with 16 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 46% are also on Medicaid. Their average risk score is 1.69, 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. Mason's median patient age at 40, with 49% women.
Dr. Mason's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mason's Medicare patients by sex, 2024
- Women2049%
- Men2151%
Chronic conditions among Dr. Mason's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Mood disorders41%
- Depression39%
- Arthritis37%
- Anxiety32%
- Diabetes32%
- Ischemic heart disease29%
Share of Medicare patients with each condition. A patient can have several.
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 40
Patient panel by sex, all payers
- Women49%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Dawson Mason wrote 70 Medicare Part D claims in 2024
In 2024, Dr. Mason wrote 70 Medicare Part D claims for 55 patients. 89% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $26 in total drug cost. In 2022, CMS named 18 claims across 1 drug.
Dr. Mason's Part D claims by kind of drug, 2024
- Generic62 claims89%
- Brand-name and other8 claims11%
Dr. Mason'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.
Drug classes CMS tracks in Dr. Mason's Part D claims, 2024
- Antibiotics54%38 of 70 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 182023: 1422%
Drugs named by CMS: 1 in 2023, 1 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
How Dr. John Dawson 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)
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Dr. John Dawson Mason received $14 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Mason from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Abiomed paid the most, $14.
Companies that paid Dr. Mason the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Dawson 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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 Dawson 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 Dawson Mason's NPI number?
Dr. John Dawson Mason's NPI number is 1023090099. It was assigned on November 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John Dawson Mason?
Dr. John Dawson Mason is an emergency medicine physician in Phoenix, Arizona. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. John Dawson Mason practice?
Dr. Mason practices at 2500 W Utopia Rd, Phoenix, AZ 85027. Dr. Mason's primary practice is HonorHealth in Phoenix, Arizona. Dmand AI also links Dr. Mason to 2 hospitals and 9 medical groups.
What is Dr. John Dawson Mason's office phone number?
The practice phone on file for Dr. Mason is (480) 784-5500.
What is Dr. John Dawson Mason's medical license number?
Dr. Mason holds Arizona license 31338.
Which hospitals is Dr. John Dawson Mason affiliated with?
Dr. Mason is affiliated with HonorHealth Tempe Medical Center. Dmand AI links Dr. Mason to 2 more hospitals.
What medical group is Dr. John Dawson Mason part of?
Dr. Mason is linked to TEC Emergency Physicians of Arizona. Dmand AI links Dr. Mason to 9 more medical groups.
Does Dr. John Dawson Mason accept Medicare?
Yes. CMS data shows Dr. Mason billed Medicare for 38 services in 2024, and Dr. Mason accepts Medicare assignment.
How many Medicare patients does Dr. John Dawson Mason see?
CMS counts 41 Medicare patients who saw Dr. Mason in 2024, with an average age of 68.
What services does Dr. John Dawson Mason bill to Medicare?
In 2024, Dr. Mason's most billed Medicare services were emergency department visit (99285) and emergency department visit (99284).
Show 3 more questionsShow fewer questions
What drugs does Dr. John Dawson Mason prescribe most?
In 2023 Medicare Part D data, Dr. Mason's most prescribed drugs by claims were Tramadol HCl.
Has Dr. John Dawson Mason received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Dr. Mason from 1 company from 2016 to 2016. The largest total came from Abiomed.
How long has Dr. John Dawson Mason been practicing?
Dr. Mason graduated from medical school in 2000, 26 years ago.
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