Dr. John William McMahon Jr., MD
- Medicare services, 2021
- 73
- Part D claims, 2024
- 28
- Hospital affiliations
- 1
- Industry payments
- $15,409
- Medical groups
- 3
- Practice address
- 1955 West Frye Road, Chandler, AZ 85224
- Practice phone
- Call (480) 728-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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 William McMahon Jr. is an obstetrics physician in Chandler, Arizona
Dr. McMahon practices at Dignity Health Chandler Regional Medical Center in Chandler, Arizona, part of CommonSpirit Health.
Dr. McMahon's NPI, 1417060328, was assigned on August 16, 2006. Dr. McMahon graduated from University of Washington School of Medicine in 1983. Dr. McMahon holds Montana license 6594.
- NPI
- 1417060328NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537230792
- NPI enumeration date
- August 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 728-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John William McMahon Jr. practices at Dignity Health Chandler Regional Medical Center in Chandler, Arizona
Dr. McMahon's primary practice is Dignity Health Chandler Regional Medical Center, at 1955 West Frye Road, Chandler, AZ 85224 in Maricopa County. The practice phone is (480) 728-3000.
- Dignity Health Chandler Regional Medical Center1955 West Frye Road, Chandler, AZ 85224 · Maricopa CountyPhone(480) 728-3000
Source: Dmand AI Affiliation Data
Dr. John William McMahon Jr. is affiliated with 2 sites of care and 3 medical groups
Dr. McMahon's primary practice is Dignity Health Chandler Regional Medical Center in Chandler, Arizona, part of CommonSpirit Health. The medical group on file is Banner Medical Group. Dmand AI also links Dr. McMahon to 2 more medical groups and 1 group practice or clinic, each 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 William McMahon Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMahon practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health Chandler Regional Medical Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John William McMahon Jr. is one of 22 obstetrics physicians in Arizona
Obstetrics is Dr. McMahon's primary specialty in the NPI Registry, under taxonomy code 207VX0000X. Dmand AI has Dr. McMahon's licenses on file in 2 states: Montana and Arizona.
Specialties and state licenses
- Obstetrics, MontanaPrimary
- Obstetrics and gynecology, Arizona
Obstetrics physicians near Dr. McMahon
Counts of obstetrics 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 William McMahon Jr. billed Medicare for 73 services in 2021
CMS data shows 73 Medicare services from Dr. McMahon across 3 procedure codes in 2021. Medicare paid $3,498 for them. Every service was in an office.
Dr. McMahon's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 812021: 6125%
- Surgery
- 2020: 142021: 1214%
- Imaging
- 2020: 502021: 0100%
Dr. McMahon compared with the Arizona median for obstetrics physicians, 2021
- Dr. McMahon
- Arizona median
- Medicare services
- 73vs 5826% above
- Part D claims
- 26vs 2030% above
Medians across 18 obstetrics physicians in Arizona with Dmand AI profiles that report each measure.
Dr. McMahon'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John William McMahon Jr.'s patients have a median age of 32
Across all payers, Dmand AI patient panel data puts Dr. McMahon's median patient age at 32, with 98% 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 32
Patient panel by sex, all payers
- Women98%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. John William McMahon Jr. wrote 28 Medicare Part D claims in 2024
In 2024, Dr. McMahon wrote 28 Medicare Part D claims. 86% of them were for generic drugs. CMS names the drug for 26 of them, across 1 drug with 11 or more claims each, at $1,322 in total drug cost. In 2020, CMS named 57 claims across 3 drugs.
Dr. McMahon's Part D claims by kind of drug, 2024
- Generic24 claims86%
- Brand-name and other4 claims14%
Dr. McMahon'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: 572021: 2654%
Drugs named by CMS: 1 in 2021, 3 in 2020.
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 William McMahon Jr. takes part in Medicare
Dr. McMahon accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of the uterus: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John William McMahon Jr. received $15,409 in industry payments from 2016 to 2024
CMS Open Payments shows 39 general payments to Dr. McMahon from 8 drug and device companies from 2016 to 2024. Education make up the largest share, 78% of the total. Intuitive Surgical, Inc. paid the most, $14,513.
General payments to Dr. McMahon by program year, 2016 to 2024
General payments to Dr. McMahon by kind, 2016 to 2024
- Education$12,00078%
- Travel and lodging$2,18914%
- Food and beverage$6474%
- Debt forgiveness$5724%
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
Dr. John William McMahon Jr. graduated from University of Washington School of Medicine
Dr. McMahon graduated from University of Washington School of Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John William 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 | 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| 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. John William 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 William McMahon Jr.'s NPI number?
Dr. John William McMahon Jr.'s NPI number is 1417060328. It was assigned on August 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John William McMahon Jr.?
Dr. John William McMahon Jr. is an obstetrics physician in Chandler, Arizona. The primary specialty in the NPI Registry is Obstetrics Physician (taxonomy code 207VX0000X).
Where does Dr. John William McMahon Jr. practice?
Dr. McMahon practices at 1955 West Frye Road, Chandler, AZ 85224. Dr. McMahon's primary practice is Dignity Health Chandler Regional Medical Center in Chandler, Arizona, part of CommonSpirit Health. Dmand AI also links Dr. McMahon to 2 medical groups and 1 group practice or clinic.
What is Dr. John William McMahon Jr.'s office phone number?
The practice phone on file for Dr. McMahon is (480) 728-3000.
What is Dr. John William McMahon Jr.'s medical license number?
Dr. McMahon holds Montana license 6594, one of the licenses on file in 2 states.
Which states has Dr. John William McMahon Jr. been licensed in?
Dmand AI has state licenses on file for Dr. McMahon in Montana and Arizona.
Which hospitals is Dr. John William McMahon Jr. affiliated with?
Dr. McMahon practices at Dignity Health Chandler Regional Medical Center in Chandler, Arizona.
What medical group is Dr. John William McMahon Jr. part of?
Dr. McMahon is linked to Banner Medical Group. Dmand AI links Dr. McMahon to 2 more medical groups.
Does Dr. John William McMahon Jr. accept Medicare?
Yes. CMS data shows Dr. McMahon billed Medicare for 73 services in 2021, and Dr. McMahon accepts Medicare assignment.
What services does Dr. John William McMahon Jr. bill to Medicare?
In 2021, Dr. McMahon's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99203) and surgery: heart and blood vessels (36415).
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Where did Dr. John William McMahon Jr. go to medical school?
Dr. McMahon graduated from University of Washington School of Medicine in 1983.
What drugs does Dr. John William McMahon Jr. prescribe most?
In 2021 Medicare Part D data, Dr. McMahon's most prescribed drugs by claims were Estradiol.
Has Dr. John William McMahon Jr. received payments from drug or device companies?
CMS Open Payments shows $15,409 in general payments to Dr. McMahon from 8 companies from 2016 to 2024. The largest total came from Intuitive Surgical, Inc.
How long has Dr. John William McMahon Jr. been practicing?
Dr. McMahon graduated from medical school in 1983, 43 years ago.
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