Dr. Robert Orenstein, DO
- Medicare services, 2024
- 478
- Medicare patients, 2024
- 331
- Part D claims, 2024
- 286
- Publications
- 59
- Clinical trials
- 2
- Practice address
- 5777 East Mayo Boulevard, Phoenix, AZ 85054
- Practice phone
- Call (480) 342-4201
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Orenstein's professional email, personal email and mobile number
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Dr. Robert Orenstein is an infectious disease specialist in Phoenix, Arizona
Dr. Orenstein practices at Mayo Clinic Hospital - Phoenix in Phoenix, Arizona, part of Mayo Clinic.
Dr. Orenstein's NPI, 1174500565, was assigned on December 27, 2005. Dr. Orenstein holds Arizona license 5472.
- NPI
- 1174500565NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971680190
- NPI enumeration date
- December 27, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (480) 342-4201
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Orenstein practices at Mayo Clinic Hospital - Phoenix in Phoenix, Arizona
Dr. Orenstein's primary practice is Mayo Clinic Hospital - Phoenix, at 5777 East Mayo Boulevard, Phoenix, AZ 85054 in Maricopa County. The practice phone is (480) 342-4201.
- Mayo Clinic Hospital - Phoenix5777 East Mayo Boulevard, Phoenix, AZ 85054 · Maricopa CountyPhone(480) 342-4201
Source: Dmand AI Affiliation Data
Dr. Robert Orenstein is affiliated with 1 site of care and 2 medical groups
Dr. Orenstein's primary practice is Mayo Clinic Hospital - Phoenix in Phoenix, Arizona, part of Mayo Clinic. The medical group on file is Mayo Clinic Arizona. Dmand AI also links Dr. Orenstein to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert Orenstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Orenstein practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Hospital - Phoenix | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Orenstein is one of 154 infectious disease specialists in Arizona
Infectious disease is Dr. Orenstein's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dmand AI has Dr. Orenstein's licenses on file in 2 states: Arizona and Minnesota.
Specialties and state licenses
- Infectious disease, ArizonaPrimary
- Internal medicine, Minnesota
Infectious disease specialists near Dr. Orenstein
Counts of infectious disease specialists 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 Orenstein billed Medicare for 478 services in 2024
CMS data shows 478 Medicare services from Dr. Orenstein across 9 procedure codes in 2024, for 331 Medicare patients. Medicare paid $48,981 for them.
Dr. Orenstein's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5072024: 4668%
- Other services
- 2023: 02024: 12
Where Dr. Orenstein's Medicare services took place, 2024
- In an office15232%
- In a facility32668%
Dr. Orenstein compared with the Arizona median for infectious disease specialists, 2024
- Dr. Orenstein
- Arizona median
- Medicare services
- 478vs 53410% below
- Medicare patients
- 331vs 19867% above
- Part D claims
- 151vs 19322% below
Medians across 141 infectious disease specialists in Arizona with Dmand AI profiles that report each measure.
Dr. Orenstein'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. Orenstein and other infectious disease specialists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Orenstein treated 331 Medicare patients in 2024, average age 71
CMS counts 331 Medicare patients who saw Dr. Orenstein in 2024. The largest group is 65 to 74, with 142 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 3.30, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Orenstein's median patient age at 65, with 46% women.
Dr. Orenstein's Medicare patients by age, 2024
Dr. Orenstein's Medicare patients by sex, 2024
- Women15146%
- Men18054%
Chronic conditions among Dr. Orenstein's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis53%
- Chronic kidney disease52%
- Ischemic heart disease47%
- Diabetes41%
- Heart failure40%
- Mood disorders38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Orenstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women46%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Orenstein wrote 286 Medicare Part D claims in 2024
In 2024, Dr. Orenstein wrote 286 Medicare Part D claims for 77 patients. 66% of them were for generic drugs. CMS names the drug for 151 of them, across 10 drugs with 11 or more claims each, at $286,910 in total drug cost. In 2023, CMS named 135 claims across 7 drugs.
Dr. Orenstein's Part D claims by kind of drug, 2024
- Generic190 claims66%
- Brand-name96 claims34%
Dr. Orenstein'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. Orenstein's Part D claims, 2024
- Antibiotics33%93 of 286 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: 1352024: 15112%
Drugs named by CMS: 10 in 2024, 7 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
Dr. Robert Orenstein scored 86 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Orenstein for performance year 2024, reported as part of a group. Dr. Orenstein accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Orenstein as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Orenstein's MIPS scores, performance year 2024
- 86of 100Final score
- 78.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Robert Orenstein has 59 publications on record
Dmand AI links 59 papers to Dr. Orenstein, published from 2011 to 2024. 2022 was the busiest year, with 7. The most frequent topics are Clostridioides difficile, Clostridium Infections and COVID-19. Dr. Orenstein has published most often in Mayo Clin Proc. Dr. Orenstein's most frequent co-authors are Sahil Khanna, MBBS, Janis E. Blair, MD and Ravindra Ganesh, MD.
Dr. Orenstein's papers by year, 2015 to 2024
Topics Dr. Orenstein writes about most
- Clostridioides difficile
- Clostridium Infections
- COVID-19
- Anti-Bacterial Agents
- Enterocolitis, Pseudomembranous
- SARS-CoV-2
- Feces
- Fecal Microbiota Transplantation
Dr. Orenstein's most frequent co-authors
- Sahil Khanna, MBBS10 shared papers
- Janis E. Blair, MD8 shared papers
- Ravindra Ganesh, MD8 shared papers
Recent publications by Dr. Orenstein
See who Dr. Orenstein researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Orenstein works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert Orenstein has worked on 2 clinical trials
Dmand AI links Dr. Orenstein to 2 clinical trials, 2 of them phase 2 studies. Conditions studied include Clostridium Infections, COVID-19 and Gram-Positive Bacterial Infections.
Conditions in Dr. Orenstein's trials
- Clostridium Infections
- COVID-19
- Gram-Positive Bacterial Infections
- Pneumonia, Viral
Investigators on the most trials with Dr. Orenstein
- Haider Afzal, MD1 shared trial
- Carolyn Dahlen Alonso, MD1 shared trial
- Jordan Eric Axelrad, MD, MPH1 shared trial
Recent clinical trials with Dr. Orenstein
Phase 2 Study of VE303 for Prevention of Recurrent Clostridioides Difficile Infection (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Robert Orenstein received $25,827 in industry payments from 2020 to 2024
CMS Open Payments shows 40 general payments to Dr. Orenstein from 4 drug and device companies from 2020 to 2024. Speaker and faculty fees make up the largest share, 70% of the total. Ferring Pharmaceuticals Inc. paid the most, $25,626.
General payments to Dr. Orenstein by program year, 2020 to 2024
General payments to Dr. Orenstein by kind, 2020 to 2024
- Speaker and faculty fees$18,01470%
- Consulting fees$4,46317%
- Travel and lodging$1,5766%
- Food and beverage$1,1845%
- Education$5912%
Companies that paid Dr. Orenstein the most, 2020 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Robert Orenstein'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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Robert Orenstein
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 Orenstein's NPI number?
Dr. Robert Orenstein's NPI number is 1174500565. It was assigned on December 27, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Orenstein?
Dr. Robert Orenstein is an infectious disease specialist in Phoenix, Arizona. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Robert Orenstein practice?
Dr. Orenstein practices at 5777 East Mayo Boulevard, Phoenix, AZ 85054. Dr. Orenstein's primary practice is Mayo Clinic Hospital - Phoenix in Phoenix, Arizona, part of Mayo Clinic. Dmand AI also links Dr. Orenstein to 1 medical group.
What is Dr. Robert Orenstein's office phone number?
The practice phone on file for Dr. Orenstein is (480) 342-4201.
What is Dr. Robert Orenstein's medical license number?
Dr. Orenstein holds Arizona license 5472, one of the licenses on file in 2 states.
Which states has Dr. Robert Orenstein been licensed in?
Dmand AI has state licenses on file for Dr. Orenstein in Arizona and Minnesota.
Which hospitals is Dr. Robert Orenstein affiliated with?
Dr. Orenstein practices at Mayo Clinic Hospital - Phoenix in Phoenix, Arizona.
What medical group is Dr. Robert Orenstein part of?
Dr. Orenstein is linked to Mayo Clinic Arizona. Dmand AI links Dr. Orenstein to 1 more medical group.
Does Dr. Robert Orenstein accept Medicare?
Yes. CMS data shows Dr. Orenstein billed Medicare for 478 services in 2024, and Dr. Orenstein accepts Medicare assignment.
Does Dr. Robert Orenstein offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Orenstein as offering telehealth services.
Show 8 more questionsShow fewer questions
What is Dr. Robert Orenstein's MIPS score?
Dr. Orenstein's MIPS final score for performance year 2024 is 86 out of 100, reported as part of a group.
How many Medicare patients does Dr. Robert Orenstein see?
CMS counts 331 Medicare patients who saw Dr. Orenstein in 2024, with an average age of 71.
What services does Dr. Robert Orenstein bill to Medicare?
In 2024, Dr. Orenstein's most billed Medicare services were hospital inpatient care (99223), hospital inpatient care (99233) and office visit, established patient (99214).
What drugs does Dr. Robert Orenstein prescribe most?
In 2024 Medicare Part D data, Dr. Orenstein's most prescribed drugs by claims were Azithromycin, Biktarvy and Fluconazole.
Has Dr. Robert Orenstein received payments from drug or device companies?
CMS Open Payments shows $25,827 in general payments to Dr. Orenstein from 4 companies from 2020 to 2024. The largest total came from Ferring Pharmaceuticals Inc.
How long has Dr. Robert Orenstein been practicing?
Dr. Orenstein graduated from medical school in 1987, 39 years ago.
Does Dr. Robert Orenstein do research?
Dmand AI links 59 publications to Dr. Orenstein, published from 2011 to 2024. Dr. Orenstein has worked on 2 clinical trials.
Who does Dr. Robert Orenstein publish with?
Dr. Orenstein's most frequent co-authors are Sahil Khanna, MBBS (10 shared papers), Janis E. Blair, MD (8 shared papers) and Ravindra Ganesh, MD (8 shared papers).
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