Marcellus Saka Assiago, MD
Nephrology Physician · Riverton, UT
Marcellus Saka Assiago, MD is a nephrology physician with a practice address in Riverton, Utah, and NPI 1235348897, issued on May 21, 2007. Check the license (Utah 6856533-1205, as entered in NPPES) on the Utah Medical Licensing Board; the Medicare figures below come from public CMS files.
- Name
- Marcellus Saka Assiago
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 6856533-1205 UT
13068 NV
Self-reported in NPPES; status is on the state search - Practice location
- 12523 S Creek Meadow RD Ste 111, Riverton, UT 84065
- Phone
- (801) 288-2634
- Enumerated
- May 21, 2007
- Record last updated
- May 2, 2024
- Fax
- (801) 288-1186
- Medicaid ID
- 1235348897 UT
- Medicare enrollment
- Enrolled (PECOS I20080801000371); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 84 in Utah → Look up another NPI →
Also registered at 12523 S Creek Meadow RD Ste 111
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Shaffner, D.O.Nephrology Physician1811375298
Verify Marcellus Saka Assiago in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersUtah Medical Licensing Board
Search for license 6856533-1205Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average nephrology physician in 2024
1,080 Medicare Part D claims for 203 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Amlodipine Besylate93 claims
- Calcitriol75 claims
- Potassium Chloride68 claims
- Jardiance59 claims
- Carvedilol58 claims
- Farxiga49 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $170.39
9 payments; by number, the most common kind was food and beverage; the largest payer was Travere Therapeutics, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Nephrology Associates OF Utah LLCRiverton, UT
- St George Kidney Care LLCCedar City, UT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marcellus Saka Assiago among 84 nephrology physician records in Utah
Marcellus Saka Assiago, MD is one of 84 nephrology physician records with a practice address in Utah. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 40% newer
- In a Medicare fileYes · 95% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated1999 · median 2001 among the 70 with a school on file
- Record last updated2024 · 33% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Utah practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Utah
There are 84 nephrology physician records in Utah.
All 84 in Utah → Every provider in Riverton → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- James Shaffner, D.O.Riverton, UT 840651811375298
- Jerald Boseman, MDOrem, UT 840581801807144
- Melanie Harper, RN, CNNNorth Salt Lake, UT 840541588404552
- Shariq Ahmad, M.D.Layton, UT 840411861490211
- Andrew Cortez, D.O.Layton, UT 840411902882806
- Ryan McDonald, MDLayton, UT 840411194915561
- Josephine Abraham, M.D.Salt Lake City, UT 841071942260229
- Bogdan Anea, MDMurray, UT 841071003308859
Common questions
What is Marcellus Saka Assiago, MD's NPI number?
Marcellus Saka Assiago, MD's National Provider Identifier (NPI) is 1235348897, issued on May 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marcellus Saka Assiago, MD located?
The NPPES record lists a practice address at 12523 S Creek Meadow RD Ste 111, Riverton, UT, 84065. Phone: (801) 288-2634. Providers update this record themselves, so call before visiting.
How can I verify Marcellus Saka Assiago, MD's license?
NPPES lists Utah license number 6856533-1205, as entered by the provider. Search the Utah Medical Licensing Board at https://secure.utah.gov/llv/search/index.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marcellus Saka Assiago, MD prescribe under Medicare Part D?
In 2024, Marcellus Saka Assiago, MD had 1,080 Medicare Part D claims for 203 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.