Dr. Marcellus Saka Assiago, MD
- Medicare services, 2024
- 910
- Medicare patients, 2024
- 290
- Part D claims, 2024
- 1,080
- Hospital affiliations
- 5
- Industry payments
- $3,501
- Practice address
- 12523 S Creek Meadow Rd, Riverton, UT 84065
- Practice phone
- Call (801) 288-2634
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nephrology Associates of Utah
Riverton, Utah
Find Dr. Assiago'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. Marcellus Saka Assiago is a nephrologist in Riverton, Utah
Dr. Assiago practices at Nephrology Associates of Utah in Riverton, Utah.
Dr. Assiago's NPI, 1235348897, was assigned on May 21, 2007. Dr. Assiago graduated from Moi University School of Medicine in 1999. Dr. Assiago holds Utah license 6856533-1205.
- NPI
- 1235348897NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365516812
- NPI enumeration date
- May 21, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (801) 288-2634
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marcellus Saka Assiago practices at Nephrology Associates of Utah in Riverton, Utah
Dr. Assiago's primary practice is Nephrology Associates of Utah, at 12523 S Creek Meadow Rd, Riverton, UT 84065 in Salt Lake County. The practice phone is (801) 288-2634.
- Nephrology Associates of Utah12523 S Creek Meadow Rd, Riverton, UT 84065 · Salt Lake CountyPhone(801) 288-2634
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Marcellus Saka Assiago is affiliated with 14 sites of care and 4 medical groups
Dr. Assiago's primary practice is Nephrology Associates of Utah in Riverton, Utah. Dr. Assiago is also affiliated with Riverton Hospital. The medical group on file is Nephrology Associates of Utah. Dmand AI also links Dr. Assiago to 4 more hospitals, 5 dialysis centers, 3 group practices and clinics and 3 medical groups, each 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. Marcellus Saka Assiago's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Assiago practices, 13 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nephrology Associates of Utah | Available with a free account |
| +13 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marcellus Saka Assiago is one of 75 nephrologists in Utah
Nephrology is Dr. Assiago's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Assiago is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Assiago's licenses on file in 3 states: Utah, Nevada and Pennsylvania.
Specialties and state licenses
- Nephrology, UtahPrimary
- Nevada license
- Pennsylvania license
Clinical focus
Dmand AI lists acute kidney failure, chronic anemia, chronic kidney disease, fluid and electrolyte imbalances, hypercalcemia, kidney cysts, kidney disease and parathyroid gland disorder among the conditions Dr. Assiago treats.
Nephrologists near Dr. Assiago
Counts of nephrologists 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. Marcellus Saka Assiago billed Medicare for 910 services in 2024
CMS data shows 910 Medicare services from Dr. Assiago across 10 procedure codes in 2024, for 290 Medicare patients. Medicare paid $96,168 for them.
Dr. Assiago's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5642024: 50510%
- Other services
- 2023: 02024: 204
- Tests and treatments
- 2023: 2042024: 2011%
Where Dr. Assiago's Medicare services took place, 2024
- In an office79587%
- In a facility11513%
Dr. Assiago compared with the Utah median for nephrologists, 2024
- Dr. Assiago
- Utah median
- Medicare services
- 910vs 63643% above
- Medicare patients
- 290vs 20641% above
- Part D claims
- 913vs 59753% above
Medians across 75 nephrologists in Utah with Dmand AI profiles that report each measure.
Dr. Assiago'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.
Need commercial claims for Dr. Assiago?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Assiago and other nephrologists in Utah.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marcellus Saka Assiago treated 290 Medicare patients in 2024, average age 72
CMS counts 290 Medicare patients who saw Dr. Assiago in 2024. The largest group is 65 to 74, with 108 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 12% are also on Medicaid. Their average risk score is 3.57, 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. Assiago's median patient age at 70, with 48% women.
Dr. Assiago's Medicare patients by age, 2024
Dr. Assiago's Medicare patients by sex, 2024
- Women14550%
- Men14550%
Chronic conditions among Dr. Assiago's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol71%
- Diabetes61%
- Arthritis45%
- Heart failure38%
- Ischemic heart disease38%
- Mood disorders29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Assiago's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marcellus Saka Assiago wrote 1,080 Medicare Part D claims in 2024
In 2024, Dr. Assiago wrote 1,080 Medicare Part D claims for 203 patients. 86% of them were for generic drugs. CMS names the drug for 913 of them, across 29 drugs with 11 or more claims each, at $100,248 in total drug cost. In 2023, CMS named 621 claims across 25 drugs.
Dr. Assiago's Part D claims by kind of drug, 2024
- Generic932 claims86%
- Brand-name148 claims14%
Dr. Assiago'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. Assiago's Part D claims, 2024
- Antibiotics1%15 of 1,080 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: 6212024: 91347%
Drugs named by CMS: 29 in 2024, 25 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. Marcellus Saka Assiago offers telehealth to Medicare patients
Dr. Assiago accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Assiago as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Marcellus Saka Assiago received $3,501 in industry payments from 2016 to 2025
CMS Open Payments shows 71 general payments to Dr. Assiago from 23 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 57% of the total. Calliditas Therapeutics US Inc. paid the most, $2,164.
General payments to Dr. Assiago by program year, 2016 to 2025
General payments to Dr. Assiago by kind, 2016 to 2025
- Consulting fees$2,00057%
- Food and beverage$1,36539%
- Education$1374%
Companies that paid Dr. Assiago 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. Marcellus Saka Assiago has 1 award and honors on record
Dmand AI lists 1 award for Dr. Assiago, most recently CMS Stage 1 EHR in 2014.
Awards and honors for Dr. Assiago
- 2014
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Marcellus Saka Assiago graduated from Moi University School of Medicine
Dr. Assiago graduated from Moi University School of Medicine in 1999.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Marcellus Saka Assiago accepts plans from 16 insurance carriers
Dr. Assiago is in network with 16 carriers, including Aetna, United Healthcare and Cigna. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Cigna
- Elevance
- Alliant Health Plans
- Aspirus Health Plan
- Blue Cross Blue Shield of Michigan
- HCSC
- +8 more carriersWith a free account
Plan types Dr. Assiago accepts, by number of carriers
- PPO10
- HMO8
- Medicare5
- EPO4
- POS3
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. Marcellus Saka Assiago'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Marcellus Saka Assiago
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. Marcellus Saka Assiago's NPI number?
Dr. Marcellus Saka Assiago's NPI number is 1235348897. It was assigned on May 21, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Marcellus Saka Assiago?
Dr. Marcellus Saka Assiago is a nephrologist in Riverton, Utah. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Marcellus Saka Assiago practice?
Dr. Assiago practices at 12523 S Creek Meadow Rd, Riverton, UT 84065. Dr. Assiago's primary practice is Nephrology Associates of Utah in Riverton, Utah. Dmand AI also links Dr. Assiago to 4 hospitals, 5 dialysis centers, 3 group practices and clinics and 3 medical groups.
What is Dr. Marcellus Saka Assiago's office phone number?
The practice phone on file for Dr. Assiago is (801) 288-2634.
What is Dr. Marcellus Saka Assiago's medical license number?
Dr. Assiago holds Utah license 6856533-1205, one of the licenses on file in 3 states.
Which states has Dr. Marcellus Saka Assiago been licensed in?
Dmand AI has state licenses on file for Dr. Assiago in Utah (2008 to 2026), Nevada (2009 to 2023) and Pennsylvania (2003 to 2006).
Which hospitals is Dr. Marcellus Saka Assiago affiliated with?
Dr. Assiago is affiliated with Riverton Hospital. Dmand AI links Dr. Assiago to 4 more hospitals.
What medical group is Dr. Marcellus Saka Assiago part of?
Dr. Assiago is linked to Nephrology Associates of Utah. Dmand AI links Dr. Assiago to 3 more medical groups.
Does Dr. Marcellus Saka Assiago accept Medicare?
Yes. CMS data shows Dr. Assiago billed Medicare for 910 services in 2024, and Dr. Assiago accepts Medicare assignment.
Does Dr. Marcellus Saka Assiago offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Assiago as offering telehealth services.
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How many Medicare patients does Dr. Marcellus Saka Assiago see?
CMS counts 290 Medicare patients who saw Dr. Assiago in 2024, with an average age of 72.
Is Dr. Marcellus Saka Assiago board certified?
Yes. Dr. Assiago is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Marcellus Saka Assiago bill to Medicare?
In 2024, Dr. Assiago's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and dialysis (90960).
Where did Dr. Marcellus Saka Assiago go to medical school?
Dr. Assiago graduated from Moi University School of Medicine in 1999.
What drugs does Dr. Marcellus Saka Assiago prescribe most?
In 2024 Medicare Part D data, Dr. Assiago's most prescribed drugs by claims were Amlodipine Besylate, Calcitriol and Potassium Chloride.
Has Dr. Marcellus Saka Assiago received payments from drug or device companies?
CMS Open Payments shows $3,501 in general payments to Dr. Assiago from 23 companies from 2016 to 2025. The largest total came from Calliditas Therapeutics US Inc.
How long has Dr. Marcellus Saka Assiago been practicing?
Dr. Assiago graduated from medical school in 1999, 27 years ago.
What insurance does Dr. Marcellus Saka Assiago accept?
Dr. Assiago is in network with 16 carriers, including Aetna, United Healthcare and Cigna. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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