Dr. John Martin Shields , MD
Urology โข Brooklyn, NY
451 Clarkson Ave
Brooklyn, NY 112032054
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
NPI assigned on April 9, 2010; this date does not establish years in practice.
-
Published CMS data list 139 Original Medicare Part B services in 2017.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2017. Published rows only; this is not a quality measure.
-
Published Part B service records, 2017:
- 81003 โ Automated urinalysis test: 58 service units.
- 99213 โ Established patient outpatient office visit: 57 service units.
- 51798 โ Ultrasound measurement of bladder capacity after voiding: 24 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2017. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2016 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2017). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
-
Published CMS data list 451 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:
- Tamsulosin Hcl โ 194 prescription fills, including refills.
- Finasteride โ 171 prescription fills, including refills.
- Ciprofloxacin Hcl โ 49 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 5 records in the table ยท Guide: How to read Medicare Part D prescriber data
-
Fewer Part D prescriptions than 75% of clinicians listed under Urology in Brooklyn, NY (2024, 62 clinicians with data). Median for this group: 976. Middle half: 452 to 1,962.
Fewer Part D prescriptions than 60% of clinicians listed under Urology in New York (2024, 745 clinicians with data). Median for this group: 913. Middle half: 216 to 1,942.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part D prescriptions went from 303 in 2020 to 451 in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020โ2024.
Practice Location & Contact Primary Location
451 Clarkson Ave
Brooklyn, NY 112032054
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: University Hospital Of Brooklyn Suny Downstate Health Sciences Univers. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2003
What Public CMS Data Show
Urology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $4,695 in 2017
The total amount Medicare approved for these services in 2017. 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, 2017.
Paid by Medicare
About $3,563 in 2017
The part of the Medicare-allowed amount that Medicare itself paid in 2017, 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, 2017.
30-day fills
1,020 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
$6,686 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: $722.63 across 10 records.
By nature of payment
- Food and Beverage: $722.63 across 10 records.
Reporting-company totals (3 largest of 7)
- Shionogi Inc: $246.85 across 2 records.
- Baxter Healthcare: $150.00 across 1 record.
- Cook Medical LLC: $94.89 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
23 years (graduated 2003)
CMS Doctors and Clinicians data list 2003 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.
NPI first issued
2010
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; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
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. Shields 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. Shields 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 Brooklyn and New York
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 75% of clinicians listed under Urology in Brooklyn, NY (2024, 62 clinicians with data). Median for this group: 976. Middle half: 452 to 1,962.
Fewer Part D prescriptions than 60% of clinicians listed under Urology in New York (2024, 745 clinicians with data). Median for this group: 913. Middle half: 216 to 1,942.
Part D drug cost
A lower Part D drug cost than 85% of clinicians listed under Urology in Brooklyn, NY (2024, 62 clinicians with data). Median for this group: $91,602. Middle half: $18,874 to $282,255.
A lower Part D drug cost than 75% of clinicians listed under Urology in New York (2024, 745 clinicians with data). Median for this group: $79,790. Middle half: $12,830 to $271,371.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Shields are from 2017.
81 active clinicians are listed under Urology with a practice address in Brooklyn, NY (1,091 in New York).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Brooklyn
37% of these 81 clinicians have the CMS telehealth indicator.
72.8% of these 81 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
CMS data for Medicare Part B services are available for 2017 only.
-
Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2017 only.
-
Paid by Medicare
CMS data for Medicare payment amount are available for 2017 only.
-
Medicare Part D prescriptions
Medicare Part D prescriptions increased 49% from 303 in 2020 to 451 in 2024.
- 2020: 303
- 2021: 365
- 2022: 370
- 2023: 364
- 2024: 451
-
30-day fills
30-day fills increased 46% from 700 in 2020 to 1,020 in 2024.
- 2020: 700
- 2021: 813
- 2022: 819
- 2023: 830
- 2024: 1,020
-
Part D drug cost
Part D drug cost decreased 36% from $10,409 in 2020 to $6,686 in 2024.
- 2020: $10,409
- 2021: $14,285
- 2022: $127,352
- 2023: $164,009
- 2024: $6,686
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $39.35 in 2019 to $722.63 in 2025.
- 2019: $39.35
- 2022: $11.90
- 2023: $53.50
- 2024: $480.10
- 2025: $722.63
Sources: CMS Medicare Physician & Other Practitioners (2017), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, 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 $722.63.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Baxter Healthcare |
Food and Beverage
In-kind items and services
|
PREVELEAK | General | $150.00 |
| Shionogi Inc |
Food and Beverage
In-kind items and services
|
Fetroja | General | $125.00 |
| Shionogi Inc |
Food and Beverage
In-kind items and services
|
Fetroja | General | $121.85 |
| Cook Medical LLC |
Food and Beverage
Cash or cash equivalent
|
LITHO 150 | General | $94.89 |
| Procept Biorobotics Corporation |
Food and Beverage
Cash or cash equivalent
|
AQUABEAM ROBOTIC SYSTEM | General | $83.67 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
|
SpaceOAR VUE System - 10mL | General | $55.78 |
| Sumitomo Pharma America, Inc. |
Food and Beverage
In-kind items and services
|
ORGOVYX | General | $26.32 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
Nubeqa | General | $25.43 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
Nubeqa | General | $20.72 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
Nubeqa | General | $18.97 |
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 2016 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, 2017; 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 |
|---|---|---|---|---|
|
81003
Automated urinalysis test
|
58 | 53 | $16.00 | $2.97 |
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
57 | 56 | $246.61 | $71.41 |
|
51798
Ultrasound measurement of bladder capacity after voiding
|
24 | 24 | $100.67 | $18.84 |
Source: CMS Part B by Provider and Service, 2017; 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 |
|---|---|---|---|---|---|
| Tamsulosin Hcl | Tamsulosin Hcl | 194 | 14,610 | $3,427.02 | 84 |
| Finasteride | Finasteride | 171 | 12,434 | $2,201.42 | 68 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 49 | 441 | $285.31 | 43 |
| Oxybutynin Chloride | Oxybutynin Chloride | 26 | 1,324 | $559.82 | โ |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 11 | 690 | $212.80 | 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
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.
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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - UROLOGY
I20181019002184
NY
0840504460
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
University Hospital Of Brooklyn Suny Downstate Health Sciences Univers
470 Clarkson Ave, Brooklyn, NY 112032012
Phone: 7182701000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant - Surgical
Physician Assistant (Certified)
Internal Medicine
Doctor of Medicine (M.D.)
Student in an Organized Health Care Education/Training Program
Doctor of Dental Surgery
Dentist - Oral and Maxillofacial Surgery
Doctor of Dental Surgery
Internal Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 451 CLARKSON AVE, BROOKLYN, NY 112032054 (Tel: 7182454110)
Registered at 451 CLARKSON AVE BLDG 9TH, BROOKLYN, NY 112032054 (Tel: 7182454110)
NPI status registered as active in NPPES database
Registered at 1600 SW ARCHER RD, BOX 100247, GAINESVILLE, FL 326100247 (Tel: 3522736815)
Registered at 1600 SW ARCHER RD, BOX 100247, GAINESVILLE, FL 326100247 (Tel: 3522736815)
Recorded as JOHN SHIELDS, M.D.
Urology (license number reported to NPPES: FL ME128662)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Urology Specialists in Brooklyn
- Dr. Brian Mcneil, MD
- Dr. Edward Zoltan, MD
- Dr. Vladimir Krichevsky, MD
- Dr. Rupert Thompson, MD
- Dr. Alfred Shtainer, MD
- Dr. Courtney Lee, MD
Mailing Address
451 Clarkson Ave Bldg 9th
Brooklyn, NY 112032054
Phone: 7182454110