Active NPI 1235348897 Individual Practitioner Male Practitioner

Dr. Marcellus Saka Assiago , MD

Internal Medicine - Nephrology • Riverton, UT

✓ Accepts Medicare Assignment Telehealth Available

Public Directory Information & Medical Disclaimer

This profile is compiled from official public domain records provided by CMS and the NPPES registry. TRUE-MEDINFO is an independent reference directory and does not provide medical advice, diagnosis, or treatment recommendations. Always consult a licensed medical professional for personal health decisions.

Professional Overview & Biography Verified Profile Summary

Dr. Marcellus Assiago, MD is a registered Internal Medicine - Nephrology practitioner in Riverton, UT. With approximately 27 years of clinical practice since completing medical education in 1999, Dr. Assiago provides healthcare services at the registered practice location at 12523 S CREEK MEADOW RD STE 111.

Dr. Assiago maintains professional affiliations with St George Kidney Care Llc, Nephrology Associates Of Utah Llc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's, dialysis services. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

12523 S Creek Meadow Rd Ste 111

Riverton, UT 840657291

Telephone 8012882634

Fax 8012881186

Associated Practice Facility / Clinic

🏢 Nephrology Associates Of Utah Llc Facility NPI 1750473948

Medicare Profile & Education

Medical School

Other

Graduation Year

1999

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine - Nephrology in Riverton, UT

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

27 Yrs +8.0 yrs vs City Avg

City Avg: 19.0 Yrs

State Avg: 23.5 Yrs

Regional Practice Density

2 Specialists

Practicing in Riverton, UT (85 Statewide)

Telehealth Adoption Rate

100.0% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

63.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Assiago (27 Years) 27 Yrs

Riverton Specialty Average (19.0 Years) 19.0 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	207	139	$316.39	$99.03
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	204	145	$40.10	$15.68
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	168	28	$863.90	$334.01
99213 Established patient office or other outpatient visit, typically 15 minutes	77	60	$223.91	$77.07
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	62	46	$444.62	$142.53
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	58	28	$290.25	$110.54
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	44	44	$543.39	$209.35
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	38	22	$192.63	$74.64
90966 Home dialysis services per month, patient 20 years of age or older	33	16	$717.17	$272.30
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	19	19	$425.16	$163.54

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	178	132	$321.92	$119.37
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	166	27	$887.33	$335.81
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	102	43	$294.79	$114.24
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	76	36	$197.25	$75.94
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	69	57	$451.51	$168.60
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	52	52	$554.63	$206.12
99213 Established patient office or other outpatient visit, typically 15 minutes	50	38	$227.47	$85.79
90966 Home dialysis services per month, patient 20 years of age or older	38	14	$734.45	$283.00
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	26	25	$434.60	$166.51
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$418.50	$158.48

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	165	144	$263.33	$122.67
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	139	46	$843.41	$345.56
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	86	86	$554.82	$209.86
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	67	59	$390.48	$171.47
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	39	22	$222.86	$98.67
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	36	28	$543.90	$288.11
99213 Established patient office or other outpatient visit, typically 15 minutes	29	26	$216.03	$86.63
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	17	$424.21	$191.34
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$405.68	$160.44

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
90970 Dialysis services, per day, less than full month service (20 years or older)	350	14	$20.00	$9.45
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	298	208	$217.00	$124.21
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	269	51	$606.41	$350.55
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	132	106	$292.60	$173.53
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	96	43	$213.99	$98.57
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	94	42	$490.47	$289.99
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	53	53	$430.58	$214.78
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	41	37	$417.09	$193.80
99213 Established patient office or other outpatient visit, typically 15 minutes	37	36	$150.38	$88.23
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	35	20	$148.19	$69.57
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	17	17	$334.55	$162.55
99442 Telephone medical discussion with physician, 11-20 minutes	17	14	$150.38	$88.51
90935 Hemodialysis procedure with physician evaluation	16	11	$169.99	$71.15
99443 Telephone medical discussion with physician, 21-30 minutes	14	14	$217.00	$125.69

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	359	72	$600.00	$279.52
90970 Dialysis services, per day, less than full month service (20 years or older)	336	16	$20.00	$8.01
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	311	227	$292.60	$139.12
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	223	96	$480.00	$235.39
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	196	177	$217.00	$104.20
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	156	64	$213.99	$100.07
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	77	65	$417.09	$196.36
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	71	44	$148.19	$70.79
99442 Telephone medical discussion with physician, 11-20 minutes	45	43	$150.38	$71.75
99443 Telephone medical discussion with physician, 21-30 minutes	40	37	$217.00	$104.70
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	33	33	$430.58	$203.77
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	29	29	$334.55	$152.00
99213 Established patient office or other outpatient visit, typically 15 minutes	17	17	$150.38	$70.09
90962 Dialysis services, 1 physician visit per month (20 years or older)	12	11	$350.00	$182.15
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$223.76	$102.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	658	385	$292.60	$141.76
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	277	69	$600.00	$278.33
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	241	79	$480.00	$234.83
90970 Dialysis services, per day, less than full month service (20 years or older)	182	11	$20.00	$7.68
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	169	136	$217.00	$99.69
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	119	52	$213.99	$100.73
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	118	69	$148.19	$72.67
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	49	45	$415.35	$202.72
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	44	44	$334.55	$149.89
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	38	38	$424.26	$189.82
90962 Dialysis services, 1 physician visit per month (20 years or older)	34	28	$350.00	$181.01
99213 Established patient office or other outpatient visit, typically 15 minutes	22	20	$147.71	$70.95
90935 Hemodialysis procedure with physician evaluation	15	12	$169.99	$73.73
99221 Initial hospital inpatient care per day, typically 30 minutes	14	14	$211.14	$102.10

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	877	525	$288.28	$141.12
90970 Dialysis services, per day, less than full month service (20 years or older)	264	19	$20.00	$7.40
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	235	57	$480.00	$226.14
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	194	102	$600.00	$269.17
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	142	128	$215.31	$101.68
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	115	60	$146.80	$72.03
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	73	42	$211.41	$103.16
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	66	66	$327.26	$159.55
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	63	63	$413.61	$192.96
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	55	54	$400.02	$197.97
99213 Established patient office or other outpatient visit, typically 15 minutes	32	28	$144.55	$69.70
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	18	$272.32	$135.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$214.29	$105.23

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	925	506	$285.09	$139.84
90960 Dialysis services, 4 or more physician visits per month (20 years or older)	144	27	$600.00	$277.68
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	124	63	$145.38	$71.09
90961 Dialysis services, 2-3 physician visits per month (20 years or older)	111	29	$480.00	$233.07
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	75	45	$208.45	$102.86
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	70	70	$324.31	$159.60
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	53	53	$210.52	$102.85
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	44	44	$408.38	$194.94
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	42	42	$405.81	$199.88
99213 Established patient office or other outpatient visit, typically 15 minutes	20	18	$141.39	$70.56

Medical Specialties & State Licenses

CMS Verified: 2024-05-02

Internal Medicine - Nephrology Primary Specialty

NUCC Taxonomy Code: 207RN0300X

State License UT 6856533-1205

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

Internal Medicine - Nephrology

NUCC Taxonomy Code: 207RN0300X

State License NV 13068

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

1235348897 (UT)

Hospital & Practice Group Affiliations

St George Kidney Care Llc

624 S 1000, St George, UT 847905902

Phone: 4356521135

St George Kidney Care Llc

1320 N Main St, Cedar City, UT 847211230

Phone: 4356521135

Nephrology Associates Of Utah Llc

12523 S Creek Meadow Rd, Riverton, UT 840657291

Phone: 8012882634

Secondary Practice Locations

1244 N Main St Ste 101

Tooele, UT 840749839

Phone: 8012882634

3823 W 9000 S

West Jordan, UT 840885603

Phone: 8012882634

1320 N Main St Ste 103

Cedar City, UT 847211230

Phone: 4356521135

3702 S State St Ste 107

South Salt Lake, UT 841155096

Phone: 8012882634

624 S 1000 E Ste 103

St George, UT 847905902

Phone: 4356521135

3823 W 9000 S

West Jordan, UT 840885603

Phone: 8012882634

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

31 Associated Practitioners

Dr. Kevin Jansen , MD

Internal Medicine - Nephrology

NPI 1013908995

Doctor of Medicine (M.D.)

Dr. James Stinson , MD

Specialist

NPI 1023015260

Doctor of Medicine (M.D.)

Dr. Dick Lambert , MD

Specialist

NPI 1043217847

Doctor of Medicine (M.D.)

Jennifer Sorto , NP

Nurse Practitioner

NPI 1043906555

Nurse Practitioner

Dr. Dave Tien , MD

Internal Medicine - Nephrology

NPI 1053319657

Doctor of Medicine (M.D.)

Dr. Jennifer Twohig , DNP

Nurse Practitioner

NPI 1063091544

Doctor of Nursing Practice

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

16 Historical Events

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 02, 2024

Internal Medicine (License #13068 in NV)

📍

Updated Practice Location February 09, 2024

Registered at 12523 S CREEK MEADOW RD STE 111, RIVERTON, UT 840657291 (Tel: 8012882634)

📍

Updated Business Mailing Address February 09, 2024

Registered at 3702 S STATE ST STE 107, SOUTH SALT LAKE, UT 841155096 (Tel: 8012882634)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 09, 2024

Internal Medicine (License #6856533-1205 in UT)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 18, 2022

Internal Medicine (License #13068 in NV)

✅

NPI Profile Active May 15, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location May 15, 2017

Registered at UNIVERSITY OF UTAH, 50 NORTH MEDICAL DRIVE, SALT LAKE CITY, UT 841320100 (Tel: 8015816709)

📍

Updated Business Mailing Address May 15, 2017

Registered at DIVISION OF NEPHROLOGY UNIVERSITY OF UTAH, PO BOX 413033, SALT LAKE CITY, UT 841413033 (Tel: (801) 213-3900)

👤

Provider Name / Credentials Updated May 15, 2017

Recorded as MARCELLUS ASSIAGO, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 15, 2017

Internal Medicine (License #13068 in NV)

✅

NPI Profile Active June 03, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location June 03, 2015

Registered at UNIVERSITY OF UTAH, 50 NORTH MEDICAL DRIVE, SALT LAKE CITY, UT 841320100 (Tel: 8015816709)

📍

Updated Business Mailing Address June 03, 2015

Registered at DIVISION OF NEPHROLOGY UNIVERSITY OF UTAH, PO BOX 413033, SALT LAKE CITY, UT 841413033 (Tel: 8012133900)

👤

Provider Name / Credentials Updated June 03, 2015

Recorded as MARCELLUS ASSIAGO, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 03, 2015

Internal Medicine (License #6856533-1205 in UT)

🟢

Initial NPI Registration & Enumeration May 21, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1235348897

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: May 21, 2007

Last Update: May 02, 2024

Sole Proprietor: No

Update or Correct Profile

Mailing Address

3702 S State St Ste 107

South Salt Lake, UT 841155096

Phone: 8012882634

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.