Dr. Robert Thomas Stoffer, MD
- Medicare services, 2024
- 350
- Medicare patients, 2024
- 60
- Part D claims, 2024
- 2,041
- Industry payments
- $5,324
- Affiliated sites
- 1
- Practice address
- 4150 N 108th Ave, Phoenix, AZ 85037
- Practice phone
- Call (623) 322-1145
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Phoenix West Internal Medicine LLC
Phoenix, Arizona
Find Dr. Stoffer's professional email, personal email and mobile number
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Dr. Robert Thomas Stoffer is an internist in Phoenix, Arizona
Dr. Stoffer practices at Phoenix West Internal Medicine LLC in Phoenix, Arizona.
Dr. Stoffer's NPI, 1538123427, was assigned on April 17, 2006. Dr. Stoffer graduated from University of Kansas School of Med (KC/Wich/Sal) in 1975. Dr. Stoffer holds Arizona license 10355.
- NPI
- 1538123427NPI Registry (opens in a new tab)
- NPI enumeration date
- April 17, 2006
- NPI status
- Active
- Practice phone
- (623) 322-1145
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Robert Thomas Stoffer practices at Phoenix West Internal Medicine LLC in Phoenix, Arizona
Dr. Stoffer's primary practice is Phoenix West Internal Medicine LLC, at 4150 N 108th Ave, Phoenix, AZ 85037 in Maricopa County. The practice phone is (623) 322-1145.
- Phoenix West Internal Medicine LLC4150 N 108th Ave, Phoenix, AZ 85037 · Maricopa CountyPhone(623) 322-1145
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Robert Thomas Stoffer is affiliated with 2 sites of care and 1 medical group
Dr. Stoffer's primary practice is Phoenix West Internal Medicine LLC in Phoenix, Arizona. The medical group on file is Phoenix West Internal Medicine. Dmand AI also links Dr. Stoffer to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Robert Thomas Stoffer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stoffer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Phoenix West Internal Medicine LLC | 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. Robert Thomas Stoffer is one of 2,420 internists in Arizona
Internal medicine is Dr. Stoffer's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Stoffer is licensed in Arizona.
Specialties and state licenses
- Internal medicine, ArizonaPrimary
Internists near Dr. Stoffer
Counts of internists 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. Robert Thomas Stoffer billed Medicare for 350 services in 2024
CMS data shows 350 Medicare services from Dr. Stoffer across 5 procedure codes in 2024, for 60 Medicare patients. Medicare paid $17,716 for them. Every service was in an office.
Dr. Stoffer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2692024: 32019%
- Other services
- 2023: 162024: 3088%
- Lab and pathology
- 2023: 172024: 0100%
- Tests and treatments
- 2023: 122024: 0100%
Dr. Stoffer compared with the Arizona median for internists, 2024
- Dr. Stoffer
- Arizona median
- Medicare services
- 350vs 47626% below
- Medicare patients
- 60vs 20571% below
- Part D claims
- 1,540vs 2605.9 times
Medians across 2,300 internists in Arizona with Dmand AI profiles that report each measure.
Dr. Stoffer'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. Stoffer and other internists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Thomas Stoffer treated 60 Medicare patients in 2024, average age 76
CMS counts 60 Medicare patients who saw Dr. Stoffer in 2024. The largest group is 75 to 84, with 27 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.25, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Stoffer's median patient age at 74, with 51% women.
Dr. Stoffer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Stoffer's Medicare patients by sex, 2024
- Women2338%
- Men3762%
Chronic conditions among Dr. Stoffer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Chronic kidney disease37%
- Diabetes28%
- COPD27%
- Anxiety25%
- Mood disorders22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Stoffer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Thomas Stoffer wrote 2,041 Medicare Part D claims in 2024
In 2024, Dr. Stoffer wrote 2,041 Medicare Part D claims for 201 patients. 84% of them were for generic drugs. CMS names the drug for 1,540 of them, across 42 drugs with 11 or more claims each, at $52,536 in total drug cost. In 2023, CMS named 3,351 claims across 83 drugs.
Dr. Stoffer's Part D claims by kind of drug, 2024
- Generic1,722 claims84%
- Brand-name304 claims15%
- Other15 claims1%
Dr. Stoffer's most prescribed drugs by claims, 2024
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. Stoffer's Part D claims, 2024
- Antibiotics2%39 of 2,041 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,3512024: 1,54054%
Drugs named by CMS: 42 in 2024, 83 in 2023.
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
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Dr. Robert Thomas Stoffer received $5,324 in industry payments from 2016 to 2023
CMS Open Payments shows 173 general payments to Dr. Stoffer from 26 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $2,998.
General payments to Dr. Stoffer by program year, 2016 to 2023
General payments to Dr. Stoffer by kind, 2016 to 2023
- Food and beverage$5,300100%
- Education$240%
Companies that paid Dr. Stoffer the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Thomas Stoffer graduated from University of Kansas School of Med (KC/Wich/Sal)
Dr. Stoffer graduated from University of Kansas School of Med (KC/Wich/Sal) in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Thomas Stoffer'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 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) |
| 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. Robert Thomas Stoffer
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. Robert Thomas Stoffer's NPI number?
Dr. Robert Thomas Stoffer's NPI number is 1538123427. It was assigned on April 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Thomas Stoffer?
Dr. Robert Thomas Stoffer is an internist in Phoenix, Arizona. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Robert Thomas Stoffer practice?
Dr. Stoffer practices at 4150 N 108th Ave, Phoenix, AZ 85037. Dr. Stoffer's primary practice is Phoenix West Internal Medicine LLC in Phoenix, Arizona. Dmand AI also links Dr. Stoffer to 1 group practice or clinic.
What is Dr. Robert Thomas Stoffer's office phone number?
The practice phone on file for Dr. Stoffer is (623) 322-1145.
What is Dr. Robert Thomas Stoffer's medical license number?
Dr. Stoffer holds Arizona license 10355.
What medical group is Dr. Robert Thomas Stoffer part of?
Dr. Stoffer is linked to Phoenix West Internal Medicine.
Does Dr. Robert Thomas Stoffer accept Medicare?
Yes. CMS data shows Dr. Stoffer billed Medicare for 350 services in 2024.
How many Medicare patients does Dr. Robert Thomas Stoffer see?
CMS counts 60 Medicare patients who saw Dr. Stoffer in 2024, with an average age of 76.
What services does Dr. Robert Thomas Stoffer bill to Medicare?
In 2024, Dr. Stoffer's most billed Medicare services were care management and other visits (99490), office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. Robert Thomas Stoffer go to medical school?
Dr. Stoffer graduated from University of Kansas School of Med (KC/Wich/Sal) in 1975.
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What drugs does Dr. Robert Thomas Stoffer prescribe most?
In 2024 Medicare Part D data, Dr. Stoffer's most prescribed drugs by claims were Lisinopril, Losartan Potassium and Rosuvastatin Calcium.
Has Dr. Robert Thomas Stoffer received payments from drug or device companies?
CMS Open Payments shows $5,324 in general payments to Dr. Stoffer from 26 companies from 2016 to 2023. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Robert Thomas Stoffer been practicing?
Dr. Stoffer graduated from medical school in 1975, 51 years ago.
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