Dr. Mark Lawrence Bilowus , MD
Urology • Reston, VA
1850 Town Center Parkway, Suite 409
Reston, VA 20190
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on October 2, 2006; this date does not establish years in practice.
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Published CMS data list 103 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 44 service units.
- 99213 — Established patient outpatient office visit: 15 service units.
- 51729 — Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies: 11 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 6 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 52 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Finasteride — 21 prescription fills, including refills.
- Tamsulosin Hcl — 18 prescription fills, including refills.
- Cephalexin — 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 90% of clinicians listed under Urology in Virginia (2024, 218 clinicians with data). Median for this group: 2,306. Middle half: 766 to 5,298.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 306 in 2020 to 103 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
1850 Town Center Parkway
Suite 409
Reston, VA 20190
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Urology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
48 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 – by Provider, 2024.
Medicare-allowed amount
About $15,389 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 – by Provider and Service, 2024.
Paid by Medicare
About $10,699 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 – by Provider and Service, 2024.
30-day fills
106 standardized 30-day fills in 2023
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
$1,224 in 2023
The total cost of these prescriptions in 2023, 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 – by Provider and Drug, 2023.
Open Payments general payments, program year 2024
All general payments: $167.10 across 2 records.
By nature of payment
- Food and Beverage: $167.10 across 2 records.
Reporting-company totals
- BIOPROTECT MEDICAL, INC.: $136.43 across 1 record.
- Laborie Medical Technologies Corp.: $30.67 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 2024 (published June 30, 2026).
NPI first issued
2006
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Bilowus 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. Bilowus 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 Reston and Virginia
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 90% of clinicians listed under Urology in Virginia (2024, 218 clinicians with data). Median for this group: 2,306. Middle half: 766 to 5,298.
Too few clinicians listed under Urology in Reston have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 85% of clinicians listed under Urology in Virginia (2024, 218 clinicians with data). Median for this group: $176,111. Middle half: $72,177 to $296,677.
Too few clinicians listed under Urology in Reston have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 85% of clinicians listed under Urology in Virginia (2024, 218 clinicians with data). Median for this group: $131,847. Middle half: $54,881 to $222,518.
Too few clinicians listed under Urology in Reston have Medicare Part B data for 2024 to compare.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Bilowus are from 2023.
4 active clinicians are listed under Urology with a practice address in Reston, VA (359 in Virginia).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 66% from 306 in 2020 to 103 in 2024.
- 2020: 306
- 2021: 344
- 2022: 336
- 2023: 254
- 2024: 103
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Medicare-allowed amount
Medicare-allowed amount decreased 61% from $39,055 in 2020 to $15,389 in 2024.
- 2020: $39,055
- 2021: $56,249
- 2022: $54,017
- 2023: $37,739
- 2024: $15,389
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Paid by Medicare
Paid by Medicare decreased 63% from $29,097 in 2020 to $10,699 in 2024.
- 2020: $29,097
- 2021: $42,538
- 2022: $40,324
- 2023: $27,860
- 2024: $10,699
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 72% from 183 in 2019 to 52 in 2023.
- 2019: 183
- 2020: 137
- 2021: 81
- 2022: 68
- 2023: 52
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30-day fills
30-day fills decreased 67% from 320 in 2019 to 106 in 2023.
- 2019: 320
- 2020: 257
- 2021: 125
- 2022: 112
- 2023: 106
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Part D drug cost
Part D drug cost decreased 93% from $18,563 in 2019 to $1,224 in 2023.
- 2019: $18,563
- 2020: $17,844
- 2021: $13,305
- 2022: $1,592
- 2023: $1,224
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $59.96 in 2019 to $167.10 in 2024.
- 2019: $59.96
- 2021: $17.94
- 2023: $28.42
- 2024: $167.10
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2023), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $167.10.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| BIOPROTECT MEDICAL, INC. |
Food and Beverage
In-kind items and services
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BIOPROTECT BALLOON IMPLANT SYSTEM | General | $136.43 |
| Laborie Medical Technologies Corp. |
Food and Beverage
Cash or cash equivalent
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Optilume BPH Drug Coated Balloon Catheter | General | $30.67 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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 |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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44 | 34 | $270.00 | $141.26 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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15 | 15 | $150.00 | $100.41 |
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51729
Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies
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11 | 11 | $800.00 | $436.40 |
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51741
Electronic assessment of bladder emptying
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11 | 11 | $300.00 | $7.97 |
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51784
Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings
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11 | 11 | $355.00 | $35.83 |
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51797
Insertion of device into abdomen with pressure and urine flow rate study
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11 | 11 | $400.00 | $216.81 |
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 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Finasteride | Finasteride | 21 | 1,350 | $431.52 | — |
| Tamsulosin Hcl | Tamsulosin Hcl | 18 | 1,440 | $607.57 | — |
| Cephalexin | Cephalexin | 13 | 91 | $185.05 | 12 |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208800000X
A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20180608001644
VA
3274616891
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physical Therapist
Physical Therapist, Doctor of Physical Therapy
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Anesthesiology
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated October 02, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Urology Specialists in Reston
Healthcare providers in RestonMailing Address
1850 Town Center Parkway, Suite 409
Reston, VA 20190
Phone: 7034780260