Dr. Mark Christopher Sievert , MD
Internal Medicine - Nephrology โข Reno, NV
5437 Kietzke Ln
Reno, NV 895111088
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
Dr. Mark Sievert is listed in NPPES under Internal Medicine - Nephrology.
-
NPI assigned on April 5, 2013; this date does not establish years in practice.
-
Published CMS data list 2,134 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
-
Published Part B service records, 2024:
- 99214 โ Established patient outpatient office visit: 804 service units.
- 99232 โ Subsequent hospital care with moderate levelof medical decision making: 194 service units.
- 99233 โ Subsequent hospital care with moderate levelof medical decision making: 194 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 16 records in the table ยท Guide: How to read Medicare Part B data
-
Published CMS data list 768 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
-
Published Part D records, 2024:
- Losartan Potassium โ 105 prescription fills, including refills.
- Furosemide โ 84 prescription fills, including refills.
- Sevelamer Carbonate โ 77 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 19 records in the table ยท Guide: How to read Medicare Part D prescriber data
-
More Medicare Part B services than 85% of clinicians listed under Internal Medicine - Nephrology in Reno, NV (2024, 20 clinicians with data). Median for this group: 1,409. Middle half: 1,118 to 1,616.
More Medicare Part B services than 80% of clinicians listed under Internal Medicine - Nephrology in Nevada (2024, 105 clinicians with data). Median for this group: 1,474. Middle half: 1,032 to 1,864.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part B services went from 2,035 in 2020 to 2,134 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
5437 Kietzke Ln
Reno, NV 895111088
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 6 distinct additional practice-address records in Carson City, NV; Elko, NV; Ely, NV and 3 more. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Oneill Clark Narvarte And Vicks A Professional Corporation. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
University Of Nevada School Of Medicine
2013
What Public CMS Data Show
Internal Medicine - Nephrology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
897 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $257,427 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $192,111 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
1,879 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$125,545 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $107.23 across 5 records.
By nature of payment
- Food and Beverage: $107.23 across 5 records.
Reporting-company totals (3 largest of 5)
- Travere Therapeutics, Inc.: $25.76 across 1 record.
- Tactile Systems Technology Inc: $24.96 across 1 record.
- Amgen Inc.: $23.48 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
13 years (graduated 2013)
CMS Doctors and Clinicians data list 2013 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2013
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Sievert has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Sievert as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Reno and Nevada
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Internal Medicine - Nephrology in Reno, NV (2024, 20 clinicians with data). Median for this group: 1,409. Middle half: 1,118 to 1,616.
More Medicare Part B services than 80% of clinicians listed under Internal Medicine - Nephrology in Nevada (2024, 105 clinicians with data). Median for this group: 1,474. Middle half: 1,032 to 1,864.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Internal Medicine - Nephrology in Reno, NV (2024, 20 clinicians with data). Median for this group: $202,461. Middle half: $150,021 to $214,970.
A higher Medicare-allowed amount than 80% of clinicians listed under Internal Medicine - Nephrology in Nevada (2024, 105 clinicians with data). Median for this group: $189,283. Middle half: $124,989 to $236,134.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Internal Medicine - Nephrology in Reno, NV (2024, 20 clinicians with data). Median for this group: $153,633. Middle half: $113,366 to $166,676.
A higher Medicare payment amount than 80% of clinicians listed under Internal Medicine - Nephrology in Nevada (2024, 105 clinicians with data). Median for this group: $145,399. Middle half: $95,640 to $185,941.
Medicare Part D prescriptions
More Part D prescriptions than 75% of clinicians listed under Internal Medicine - Nephrology in Reno, NV (2024, 20 clinicians with data). Median for this group: 492. Middle half: 361 to 713.
More Part D prescriptions than 60% of clinicians listed under Internal Medicine - Nephrology in Nevada (2024, 101 clinicians with data). Median for this group: 608. Middle half: 334 to 856.
Part D drug cost
A higher Part D drug cost than 70% of clinicians listed under Internal Medicine - Nephrology in Reno, NV (2024, 20 clinicians with data). Median for this group: $73,367. Middle half: $44,762 to $125,844.
Close to the middle for clinicians listed under Internal Medicine - Nephrology in Nevada (2024, 101 clinicians with data). Median for this group: $84,583. Middle half: $45,882 to $195,553.
24 active clinicians are listed under Internal Medicine - Nephrology with a practice address in Reno, NV (126 in Nevada).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Reno
70.8% of these 24 clinicians have the CMS telehealth indicator.
87.5% of these 24 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Medicare Part B services
Medicare Part B services varied from year to year: 2,035 in 2020 and 2,134 in 2024.
- 2020: 2,035
- 2021: 2,042
- 2022: 1,966
- 2023: 1,453
- 2024: 2,134
-
Medicare-allowed amount
Medicare-allowed amount decreased 24% from $339,126 in 2020 to $257,427 in 2024.
- 2020: $339,126
- 2021: $353,783
- 2022: $312,140
- 2023: $255,120
- 2024: $257,427
-
Paid by Medicare
Paid by Medicare decreased 27% from $263,059 in 2020 to $192,111 in 2024.
- 2020: $263,059
- 2021: $275,834
- 2022: $241,139
- 2023: $194,021
- 2024: $192,111
-
Medicare Part D prescriptions
Medicare Part D prescriptions increased 43% from 536 in 2020 to 768 in 2024.
- 2020: 536
- 2021: 591
- 2022: 474
- 2023: 636
- 2024: 768
-
30-day fills
30-day fills increased 41% from 1,332 in 2020 to 1,879 in 2024.
- 2020: 1,332
- 2021: 1,479
- 2022: 1,147
- 2023: 1,542
- 2024: 1,879
-
Part D drug cost
Part D drug cost increased 148% from $50,594 in 2020 to $125,545 in 2024.
- 2020: $50,594
- 2021: $164,897
- 2022: $65,551
- 2023: $160,511
- 2024: $125,545
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $209.17 in 2021 to $107.23 in 2025.
- 2021: $209.17
- 2022: $168.42
- 2023: $482.32
- 2024: $240.74
- 2025: $107.23
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $107.23.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Travere Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $25.76 |
| Tactile Systems Technology Inc |
Food and Beverage
In-kind items and services
|
Flexitouch Plus | General | $24.96 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
KRYSTEXXA | General | $23.48 |
| Apellis Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $18.81 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
|
BENLYSTA | General | $14.22 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2018โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | 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
|
804 | 567 | $256.14 | $107.30 |
|
99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
|
194 | 78 | $156.98 | $74.74 |
|
99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
|
194 | 79 | $237.26 | $113.74 |
|
90960
Dialysis services, 4 or more physician visits per month (20 years or older)
|
172 | 56 | $701.33 | $350.10 |
|
99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
|
154 | 107 | $361.86 | $133.55 |
|
99457
Management using the results of remote vital sign monitoring per calendar month, first 20 minutes
|
134 | 68 | $97.16 | $47.93 |
|
99454
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days
|
126 | 65 | $93.37 | $46.45 |
|
99458
Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes
|
104 | 50 | $77.58 | $38.43 |
|
90961
Dialysis services, 2-3 physician visits per month (20 years or older)
|
56 | 42 | $583.52 | $292.39 |
|
99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
|
43 | 42 | $341.88 | $166.02 |
|
90935
Hemodialysis procedure with physician evaluation
|
40 | 27 | $142.20 | $67.85 |
|
99453
Remote monitoring of physiologic parameters, initial set-up and patient education on use of equipment
|
37 | 37 | $38.05 | $19.55 |
|
99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
|
27 | 25 | $255.56 | $125.61 |
|
99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
21 | 21 | $334.86 | $159.24 |
|
90962
Dialysis services, 1 physician visit per month (20 years or older)
|
14 | 11 | $402.50 | $201.46 |
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
14 | 14 | $180.14 | $73.63 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Losartan Potassium | Losartan Potassium | 105 | 7,371 | $973.12 | 34 |
| Furosemide | Furosemide | 84 | 6,595 | $555.57 | 34 |
| Sevelamer Carbonate | Sevelamer Carbonate | 77 | 3,677 | $14,736.81 | 26 |
| Torsemide | Torsemide | 75 | 6,088 | $1,695.57 | 27 |
| Amlodipine Besylate | Amlodipine Besylate | 70 | 6,037 | $446.00 | 34 |
| Lisinopril | Lisinopril | 58 | 5,160 | $427.99 | 23 |
| Farxiga | Dapagliflozin Propanediol | 57 | 3,330 | $59,738.47 | 19 |
| Carvedilol | Carvedilol | 42 | 3,075 | $519.54 | 17 |
| Hydralazine Hcl | Hydralazine Hcl | 30 | 1,980 | $344.63 | โ |
| Allopurinol | Allopurinol | 25 | 2,250 | $170.17 | โ |
| Calcitriol | Calcitriol | 24 | 1,960 | $430.14 | 11 |
| Potassium Chloride | Potassium Chloride | 21 | 1,800 | $988.25 | โ |
| Spironolactone | Spironolactone | 16 | 1,080 | $157.96 | โ |
| Nifedipine Er | Nifedipine | 16 | 1,020 | $436.80 | โ |
| Jardiance | Empagliflozin | 16 | 1,140 | $20,967.76 | โ |
| Veltassa | Patiromer Calcium Sorbitex | 15 | 1,080 | $21,890.61 | โ |
| Metolazone | Metolazone | 14 | 780 | $821.44 | โ |
| Prednisone | Prednisone | 12 | 870 | $99.47 | โ |
| Tamsulosin Hcl | Tamsulosin Hcl | 11 | 930 | $144.51 | โ |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-09-12NUCC Taxonomy Code: 207RN0300X
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NEPHROLOGY
I20180718001495
NV
0244452845
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Oneill Clark Narvarte And Vicks A Professional Corporation
5437 Kietzke Ln, Reno, NV 895111088
Phone: 7753224550
Oneill Clark Narvarte And Vicks A Professional Corporation
801 E Williams Ave, Fallon, NV 894063052
Phone: 7753224550
Secondary Practice Locations
2340 S Carson St Ste A
Carson City, NV 897014540
Phone: 7753224550
5961 S Los Altos Pkwy Ste 107
Sparks, NV 894362501
Phone: 7753224550
932 Ryland St
Reno, NV 895021773
Phone: 7753224550
1995 Errecart Blvd Ste 205
Elko, NV 898018337
Phone: 7753224550
6 Steptoe Cir
Ely, NV 893012692
Phone: 7753224550
801 E Williams Ave
Fallon, NV 894063052
Phone: 7753224550
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner
Nurse Practitioner
Internal Medicine - Infectious Disease
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Family Nurse Practitioner (Board Certified)
Internal Medicine - Pulmonary Disease
Doctor of Osteopathic Medicine (D.O.)
Nurse Practitioner
Advanced Practice Registered Nurse
Physician Assistant - Medical
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 5437 KIETZKE LN, RENO, NV 895111088 (Tel: 7753224550)
Registered at 5437 KIETZKE LN, RENO, NV 895111088 (Tel: 7753224550)
Additional practice office at 5961 S Los Altos Pkwy Ste 107, Sparks, NV 894362501
Additional practice office at 801 E Williams Ave, Fallon, NV 894063052
Additional practice office at 1995 Errecart Blvd Ste 205, Elko, NV 898018337
Additional practice office at 2340 S Carson St Ste A, Carson City, NV 897014540
Additional practice office at 6 Steptoe Cir, Ely, NV 893012692
Additional practice office at 932 Ryland St, Reno, NV 895021773
Registered at 670 SIERRA ROSE DR, RENO, NV 89511 (Tel: 7753224550)
Registered at 670 SIERRA ROSE DR, RENO, NV 895112072 (Tel: 7753224550)
Additional practice office at 50 N Medical Dr, Salt Lake City, UT 841320001
Internal Medicine (license number reported to NPPES: NV 17754)
NPI status registered as active in NPPES database
Registered at 50 N MEDICAL DR, SALT LAKE CITY, UT 841320001 (Tel: 8015812121)
Registered at 30 N 1900 E, ROOM 4C104, SALT LAKE CITY, UT 841320001
Recorded as MARK SIEVERT, M.D
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine - Nephrology Specialists in Reno
- Dr. Iryna Patel, MD
- Dr. Fadi Najjar, MD
- Dr. Jusmin Patel, MD
- Dr. Lindsay Sanders, DO
- Dr. Javier Narvarte, MD
- Dr. Janina Nylk, MD
Mailing Address
5437 Kietzke Ln
Reno, NV 895111088
Phone: 7753224550