Dr. John Martin McMahon Jr., MD
- Medicare services, 2020
- 27
- Part D claims, 2016
- 98
- Hospital affiliations
- 1
- Industry payments
- $543
- Medical groups
- 2
- Practice address
- 3483 S Mercy Rd, Gilbert, AZ 85297
- Practice phone
- Call (928) 425-3261
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cobre Valley Regional Medical Center
Gilbert, Arizona
Find Dr. McMahon'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 Martin McMahon Jr. is an emergency medicine physician in Gilbert, Arizona
Dr. McMahon practices at Cobre Valley Regional Medical Center in Gilbert, Arizona.
Dr. McMahon's NPI, 1639126741, was assigned on May 27, 2006. Dr. McMahon holds Alabama license 13833.
- NPI
- 1639126741NPI Registry (opens in a new tab)
- NPI enumeration date
- May 27, 2006
- NPI status
- Active
- Practice phone
- (928) 425-3261
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John Martin McMahon Jr. practices at Cobre Valley Regional Medical Center in Gilbert, Arizona
Dr. McMahon's primary practice is Cobre Valley Regional Medical Center, at 3483 S Mercy Rd, Gilbert, AZ 85297 in Maricopa County. The practice phone is (928) 425-3261.
- Cobre Valley Regional Medical Center3483 S Mercy Rd, Gilbert, AZ 85297 · Maricopa CountyPhone(928) 425-3261
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Martin McMahon Jr. is affiliated with 2 sites of care and 2 medical groups
Dr. McMahon's primary practice is Cobre Valley Regional Medical Center in Gilbert, Arizona. Dr. McMahon is also affiliated with Springhill Medical Center. The medical group on file is USA Health Physician Billing. Dmand AI also links Dr. McMahon to 1 more medical group, 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 Martin McMahon Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMahon practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cobre Valley Regional 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. John Martin McMahon Jr. is one of 1,360 emergency medicine physicians in Arizona
Emergency medicine is Dr. McMahon's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. McMahon is licensed in Alabama.
Specialties and state licenses
- Emergency medicine, AlabamaPrimary
Emergency medicine physicians near Dr. McMahon
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 Martin McMahon Jr. billed Medicare for 27 services in 2020
CMS data shows 27 Medicare services from Dr. McMahon across 2 procedure codes in 2020. Medicare paid $3,254 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. McMahon's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 282020: 274%
Dr. McMahon compared with the Arizona median for emergency medicine physicians, 2020
- Dr. McMahon
- Arizona median
- Medicare services
- 27vs 21688% below
- Part D claims
- 98vs 5096% above
Medians across 1,326 emergency medicine physicians in Arizona with Dmand AI profiles that report each measure.
Dr. McMahon's most billed Medicare procedure codes, 2020
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. McMahon and other emergency medicine physicians in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Martin McMahon Jr.'s patients have a median age of 43
Across all payers, Dmand AI patient panel data puts Dr. McMahon's median patient age at 43, with 67% women.
Dr. McMahon's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Dr. John Martin McMahon Jr. wrote 98 Medicare Part D claims in 2016
In 2016, Dr. McMahon wrote 98 Medicare Part D claims. They cover 4 drugs, with $598 in total drug cost.
Dr. McMahon's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John Martin McMahon Jr. received $543 in industry payments from 2016 to 2024
CMS Open Payments shows 12 general payments to Dr. McMahon from 7 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. CSL Behring paid the most, $373.
General payments to Dr. McMahon by program year, 2016 to 2024
Companies that paid Dr. McMahon the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Martin McMahon Jr.'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 Martin McMahon Jr.
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 Martin McMahon Jr.'s NPI number?
Dr. John Martin McMahon Jr.'s NPI number is 1639126741. It was assigned on May 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Martin McMahon Jr.?
Dr. John Martin McMahon Jr. is an emergency medicine physician in Gilbert, Arizona. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. John Martin McMahon Jr. practice?
Dr. McMahon practices at 3483 S Mercy Rd, Gilbert, AZ 85297. Dr. McMahon's primary practice is Cobre Valley Regional Medical Center in Gilbert, Arizona. Dmand AI also links Dr. McMahon to 1 medical group.
What is Dr. John Martin McMahon Jr.'s office phone number?
The practice phone on file for Dr. McMahon is (928) 425-3261.
What is Dr. John Martin McMahon Jr.'s medical license number?
Dr. McMahon holds Alabama license 13833.
Which hospitals is Dr. John Martin McMahon Jr. affiliated with?
Dr. McMahon is affiliated with Springhill Medical Center.
What medical group is Dr. John Martin McMahon Jr. part of?
Dr. McMahon is linked to USA Health Physician Billing. Dmand AI links Dr. McMahon to 1 more medical group.
Does Dr. John Martin McMahon Jr. accept Medicare?
Yes. CMS data shows Dr. McMahon billed Medicare for 27 services in 2020.
What services does Dr. John Martin McMahon Jr. bill to Medicare?
In 2020, Dr. McMahon's most billed Medicare services were emergency department visit (99285) and emergency department visit (99284).
What drugs does Dr. John Martin McMahon Jr. prescribe most?
In 2016 Medicare Part D data, Dr. McMahon's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Prednisone and Ciprofloxacin HCl.
Has Dr. John Martin McMahon Jr. received payments from drug or device companies?
CMS Open Payments shows $543 in general payments to Dr. McMahon from 7 companies from 2016 to 2024. The largest total came from CSL Behring.
How long has Dr. John Martin McMahon Jr. been practicing?
Dr. McMahon's NPI was assigned in 2006.
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