Dr. Thomas H. On, MD
- Medicare services, 2024
- 82
- Medicare patients, 2024
- 141
- Industry payments
- $31
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 240 West Thomas Road, Suite A, Phoenix, AZ 85013
- Practice phone
- Call (602) 406-3552
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St. Joseph's Outpatient Surgery Center
Surgery Center - Medicare-Certified · Phoenix, Arizona
Find Dr. On'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. Thomas H. On is an anesthesiologist in Phoenix, Arizona
Dr. On practices at St. Joseph's Outpatient Surgery Center in Phoenix, Arizona.
Dr. On's NPI, 1831166685, was assigned on March 1, 2006. Dr. On graduated from Loyola University of Chicago, Stritch School of Medicine in 1989. Dr. On holds Arizona license 21605.
- NPI
- 1831166685NPI Registry (opens in a new tab)
- NPI enumeration date
- March 1, 2006
- NPI status
- Active
- Practice phone
- (602) 406-3552
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Thomas H. On practices at St. Joseph's Outpatient Surgery Center in Phoenix, Arizona
Dr. On's primary practice is St. Joseph's Outpatient Surgery Center, at 240 West Thomas Road, Suite A, Phoenix, AZ 85013. The practice phone is (602) 406-3552.
- St. Joseph's Outpatient Surgery Center240 West Thomas Road, Suite A, Phoenix, AZ 85013Phone(602) 406-3552
Source: Dmand AI Affiliation Data
Dr. Thomas H. On is affiliated with 2 sites of care and 1 medical group
Dr. On's primary practice is St. Joseph's Outpatient Surgery Center in Phoenix, Arizona. The medical group on file is National Partners in Healthcare. Dmand AI also links Dr. On to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas H. On's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. On practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Joseph's Outpatient Surgery Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas H. On is one of 1,244 anesthesiologists in Arizona
Anesthesiology is Dr. On's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. On is licensed in Arizona.
Specialties and state licenses
- Anesthesiology, ArizonaPrimary
Anesthesiologists near Dr. On
Counts of anesthesiologists 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. Thomas H. On billed Medicare for 82 services in 2024
CMS data shows 82 Medicare services from Dr. On across 5 procedure codes in 2024, for 141 Medicare patients. Medicare paid $9,608 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. On's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 432024: 6040%
- Surgery
- 2023: 292024: 2224%
Dr. On compared with the Arizona median for anesthesiologists, 2024
- Dr. On
- Arizona median
- Medicare services
- 82vs 7214% above
- Medicare patients
- 141vs 1336% above
Medians across 1,218 anesthesiologists in Arizona with Dmand AI profiles that report each measure.
Dr. On'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. On and other anesthesiologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas H. On treated 141 Medicare patients in 2024, average age 72
CMS counts 141 Medicare patients who saw Dr. On in 2024. The largest group is 65 to 74, with 100 patients. 70% of them have high cholesterol, and 67% have arthritis. Their average risk score is 0.81, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. On's median patient age at 54, with 48% women.
Dr. On's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. On's Medicare patients by sex, 2024
- Women8157%
- Men6043%
Chronic conditions among Dr. On's Medicare patients, 2024
- High cholesterol70%
- Arthritis67%
- High blood pressure55%
- Mood disorders26%
- Anxiety23%
- Depression23%
- Ischemic heart disease18%
- Osteoporosis16%
Share of Medicare patients with each condition. A patient can have several.
Dr. On's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women48%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
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Dr. Thomas H. On received $31 in industry payments from 2016 to 2022
CMS Open Payments shows 2 general payments to Dr. On from 2 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $17.
General payments to Dr. On by program year, 2016 to 2022
Companies that paid Dr. On the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas H. On graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. On graduated from Loyola University of Chicago, Stritch School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas H. On'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 DataMedicare Physician & Other Practitioners - by Provider (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. Thomas H. On
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. Thomas H. On's NPI number?
Dr. Thomas H. On's NPI number is 1831166685. It was assigned on March 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas H. On?
Dr. Thomas H. On is an anesthesiologist in Phoenix, Arizona. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Thomas H. On practice?
Dr. On practices at 240 West Thomas Road, Suite A, Phoenix, AZ 85013. Dr. On's primary practice is St. Joseph's Outpatient Surgery Center in Phoenix, Arizona. Dmand AI also links Dr. On to 1 group practice or clinic.
What is Dr. Thomas H. On's office phone number?
The practice phone on file for Dr. On is (602) 406-3552.
What is Dr. Thomas H. On's medical license number?
Dr. On holds Arizona license 21605.
What medical group is Dr. Thomas H. On part of?
Dr. On is linked to National Partners in Healthcare.
Does Dr. Thomas H. On accept Medicare?
Yes. CMS data shows Dr. On billed Medicare for 82 services in 2024.
How many Medicare patients does Dr. Thomas H. On see?
CMS counts 141 Medicare patients who saw Dr. On in 2024, with an average age of 72.
What services does Dr. Thomas H. On bill to Medicare?
In 2024, Dr. On's most billed Medicare services were surgery: brain, spine and nerves (64415), anesthesia (01400) and anesthesia (00170).
Where did Dr. Thomas H. On go to medical school?
Dr. On graduated from Loyola University of Chicago, Stritch School of Medicine in 1989.
Has Dr. Thomas H. On received payments from drug or device companies?
CMS Open Payments shows $31 in general payments to Dr. On from 2 companies from 2016 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Thomas H. On been practicing?
Dr. On graduated from medical school in 1989, 37 years ago.
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