Dr. John Hunt Udall , MD
Orthopaedic Surgery • Mesa, AZ
1432 S Dobson, Suite 304
Mesa, AZ 85202
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
1432 S Dobson
Suite 304
Mesa, AZ 85202
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2025
All general payments: $1,751.33 across 14 records.
By nature of payment
- Travel and Lodging: $1,533.34 across 6 records.
- Food and Beverage: $217.99 across 8 records.
Reporting-company totals (3 largest of 4)
- ImpactOrtho, Inc.: $1,424.51 across 8 records.
- Arthrex, Inc.: $298.20 across 3 records.
- Bioventus LLC: $16.22 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Udall has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Udall as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Mesa and Arizona
8 active clinicians are listed under Orthopaedic Surgery with a practice address in Mesa, AZ (470 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Industry payments (Open Payments)
Industry payments (Open Payments) decreased 66% from $5,132.74 in 2019 to $1,751.33 in 2025.
- 2019: $5,132.74
- 2020: $1,182.37
- 2023: $43.91
- 2024: $82.41
- 2025: $1,751.33
Sources: CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 14 records totaling $1,751.33.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ImpactOrtho, Inc. |
Travel and Lodging
In-kind items and services
|
— | General | $937.34 |
| Arthrex, Inc. |
Travel and Lodging
In-kind items and services
|
— | General | $244.20 |
| ImpactOrtho, Inc. |
Travel and Lodging
In-kind items and services
|
— | General | $244.20 |
| ImpactOrtho, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $68.77 |
| ImpactOrtho, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $57.11 |
| ImpactOrtho, Inc. |
Travel and Lodging
In-kind items and services
|
— | General | $44.22 |
| ImpactOrtho, Inc. |
Travel and Lodging
In-kind items and services
|
— | General | $37.50 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $34.00 |
| ImpactOrtho, Inc. |
Travel and Lodging
In-kind items and services
|
— | General | $25.88 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $20.00 |
| Bioventus LLC |
Food and Beverage
In-kind items and services
|
EXOGEN ULTRASOUND BONE HEALING SYSTEM | General | $16.22 |
| ImpactOrtho, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $9.49 |
| Orthofix Medical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Physio-Stim | General | $7.35 |
| Orthofix Medical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Physio-Stim | General | $5.05 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PEDIATRIC MEDICINE
I20090814000211
AZ
5799839486
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant - Surgical
Career & Practice History
NPI enumerated June 27, 2007.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to November 2026.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Mesa
- Dr. Gary Purcell, MD
- Dr. Nirain D'souza, MD
- Dr. Brian Mcwhorter, DO
- Dr. Jeffrey Surina, MD
- Dr. Emily Naclerio, MD
- Dr. Amalia De Comas, MD
Mailing Address
1432 S Dobson, Suite 304
Mesa, AZ 85202
Phone: 4804127400