Dr. Stephen Jerome Portz, MD
- Medicare services, 2024
- 1,678
- Medicare patients, 2024
- 589
- Part D claims, 2024
- 2,838
- MIPS score, 2024
- 23
- Industry payments
- $8,527
- Practice address
- 2865 Siena Heights Dr, Henderson, NV 89052
- Practice phone
- Call (713) 586-6705
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Michael's Center for Special Surgery
Henderson, Nevada
Find Dr. Portz's professional email, personal email and mobile number
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Dr. Stephen Jerome Portz is a cardiologist in Henderson, Nevada
Dr. Portz practices at St Michael's Center for Special Surgery in Henderson, Nevada.
Dr. Portz's NPI, 1811933500, was assigned on June 21, 2006. Dr. Portz graduated from University of Kansas School of Med (KC/Wich/Sal) in 1982. Dr. Portz holds Nevada license 5648.
- NPI
- 1811933500NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335120583
- NPI enumeration date
- June 21, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (713) 586-6705
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen Jerome Portz practices at St Michael's Center for Special Surgery in Henderson, Nevada
Dr. Portz's primary practice is St Michael's Center for Special Surgery, at 2865 Siena Heights Dr, Henderson, NV 89052 in Clark County. The practice phone is (713) 586-6705.
- St Michael's Center for Special Surgery2865 Siena Heights Dr, Henderson, NV 89052 · Clark CountyPhone(713) 586-6705
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen Jerome Portz is affiliated with 2 sites of care and 1 medical group
Dr. Portz's primary practice is St Michael's Center for Special Surgery in Henderson, Nevada. The medical group on file is Intermountain Health. Dmand AI also links Dr. Portz 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. Stephen Jerome Portz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Portz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Michael's Center for Special Surgery | 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. Stephen Jerome Portz is one of 147 cardiologists in Nevada
Cardiovascular disease is Dr. Portz's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Portz is licensed in Nevada.
Specialties and state licenses
- Cardiovascular disease, NevadaPrimary
Cardiologists near Dr. Portz
Counts of cardiologists 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. Stephen Jerome Portz billed Medicare for 1,678 services in 2024
CMS data shows 1,678 Medicare services from Dr. Portz across 11 procedure codes in 2024, for 589 Medicare patients. Medicare paid $125,961 for them. Every service was in an office.
Dr. Portz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7122024: 84018%
- Tests and treatments
- 2023: 3312024: 49249%
- Drugs given in the office
- 2023: 1042024: 15650%
- Other services
- 2023: 922024: 12637%
- Imaging
- 2023: 482024: 6433%
- Lab and pathology
- 2023: 292024: 0100%
Dr. Portz compared with the Nevada median for cardiologists, 2024
- Dr. Portz
- Nevada median
- Medicare services
- 1,678vs 2,74339% below
- Medicare patients
- 589vs 91436% below
- Part D claims
- 2,649vs 2,17322% above
Medians across 143 cardiologists in Nevada with Dmand AI profiles that report each measure.
Dr. Portz'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. Portz and other cardiologists in Nevada.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen Jerome Portz treated 589 Medicare patients in 2024, average age 77
CMS counts 589 Medicare patients who saw Dr. Portz in 2024. The largest group is 75 to 84, with 299 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.26, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Portz's median patient age at 77, with 41% women.
Dr. Portz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Portz's Medicare patients by sex, 2024
- Women26846%
- Men32154%
Chronic conditions among Dr. Portz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease53%
- Arthritis47%
- Diabetes35%
- Chronic kidney disease28%
- Atrial fibrillation26%
- Anxiety19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Portz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women41%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen Jerome Portz wrote 2,838 Medicare Part D claims in 2024
In 2024, Dr. Portz wrote 2,838 Medicare Part D claims for 466 patients. 87% of them were for generic drugs. CMS names the drug for 2,649 of them, across 46 drugs with 11 or more claims each, at $401,995 in total drug cost. In 2023, CMS named 3,634 claims across 54 drugs.
Dr. Portz's Part D claims by kind of drug, 2024
- Generic2,475 claims87%
- Brand-name363 claims13%
Dr. Portz'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,6342024: 2,64927%
Drugs named by CMS: 46 in 2024, 54 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. Stephen Jerome Portz scored 23 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 23 out of 100 for Dr. Portz for performance year 2024, reported individually. Dr. Portz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Portz's MIPS scores, performance year 2024
- 23of 100Final score
- 0of 100Quality
- 0of 100Promoting Interoperability
- 0of 100Improvement Activities
- 76of 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. Stephen Jerome Portz received $8,527 in industry payments from 2016 to 2025
CMS Open Payments shows 353 general payments to Dr. Portz from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Medtronic Vascular, Inc. paid the most, $1,803.
General payments to Dr. Portz by program year, 2016 to 2025
General payments to Dr. Portz by kind, 2016 to 2025
- Food and beverage$8,494100%
- Education$340%
Companies that paid Dr. Portz the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen Jerome Portz graduated from University of Kansas School of Med (KC/Wich/Sal)
Dr. Portz graduated from University of Kansas School of Med (KC/Wich/Sal) in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen Jerome Portz'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) |
| 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) |
| 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. Stephen Jerome Portz
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. Stephen Jerome Portz's NPI number?
Dr. Stephen Jerome Portz's NPI number is 1811933500. It was assigned on June 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen Jerome Portz?
Dr. Stephen Jerome Portz is a cardiologist in Henderson, Nevada. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Stephen Jerome Portz practice?
Dr. Portz practices at 2865 Siena Heights Dr, Henderson, NV 89052. Dr. Portz's primary practice is St Michael's Center for Special Surgery in Henderson, Nevada. Dmand AI also links Dr. Portz to 1 group practice or clinic.
What is Dr. Stephen Jerome Portz's office phone number?
The practice phone on file for Dr. Portz is (713) 586-6705.
What is Dr. Stephen Jerome Portz's medical license number?
Dr. Portz holds Nevada license 5648.
What medical group is Dr. Stephen Jerome Portz part of?
Dr. Portz is linked to Intermountain Health.
Does Dr. Stephen Jerome Portz accept Medicare?
Yes. CMS data shows Dr. Portz billed Medicare for 1,678 services in 2024, and Dr. Portz accepts Medicare assignment.
What is Dr. Stephen Jerome Portz's MIPS score?
Dr. Portz's MIPS final score for performance year 2024 is 23 out of 100, reported individually.
How many Medicare patients does Dr. Stephen Jerome Portz see?
CMS counts 589 Medicare patients who saw Dr. Portz in 2024, with an average age of 77.
What services does Dr. Stephen Jerome Portz bill to Medicare?
In 2024, Dr. Portz's most billed Medicare services were office visit, established patient (99214), heart test or procedure (93005) and injected or infused drug (J2785).
Show 4 more questionsShow fewer questions
Where did Dr. Stephen Jerome Portz go to medical school?
Dr. Portz graduated from University of Kansas School of Med (KC/Wich/Sal) in 1982.
What drugs does Dr. Stephen Jerome Portz prescribe most?
In 2024 Medicare Part D data, Dr. Portz's most prescribed drugs by claims were Atorvastatin Calcium, Metoprolol Succinate and Amlodipine Besylate.
Has Dr. Stephen Jerome Portz received payments from drug or device companies?
CMS Open Payments shows $8,527 in general payments to Dr. Portz from 32 companies from 2016 to 2025. The largest total came from Medtronic Vascular, Inc.
How long has Dr. Stephen Jerome Portz been practicing?
Dr. Portz graduated from medical school in 1982, 44 years ago.
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