Dr. John Martin Shields, MD
- Medicare services, 2017
- 139
- Part D claims, 2024
- 535
- Hospital affiliations
- 3
- Industry payments
- $36,966
- Medical groups
- 2
- Practice address
- 451 Clarkson Avenue, Brooklyn, NY 11203
- Practice phone
- Call (718) 245-3901
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Shields' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Martin Shields is a urologist in Brooklyn, New York
Dr. Shields practices at NYC Health + Hospitals/Kings County in Brooklyn, New York, part of NYC.
Dr. Shields' NPI, 1699091199, was assigned on April 9, 2010. Dr. Shields graduated from Royal College of Surgeons in Ireland - Medical University of Bahrain in 2003. Dr. Shields holds New York license 286086.
- NPI
- 1699091199NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0840504460
- NPI enumeration date
- April 9, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (718) 245-3901
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Martin Shields practices at NYC Health + Hospitals/Kings County in Brooklyn, New York
Dr. Shields' primary practice is NYC Health + Hospitals/Kings County, at 451 Clarkson Avenue, Brooklyn, NY 11203 in Kings County. The practice phone is (718) 245-3901.
- NYC Health + Hospitals/Kings County451 Clarkson Avenue, Brooklyn, NY 11203 · Kings CountyPhone(718) 245-3901
Source: Dmand AI Affiliation Data
Dr. John Martin Shields is affiliated with 3 sites of care and 2 medical groups
Dr. Shields' primary practice is NYC Health + Hospitals/Kings County in Brooklyn, New York, part of NYC. Dr. Shields is also affiliated with NYC Health + Hospitals/Woodhull. The medical group on file is NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital. Dmand AI also links Dr. Shields to 1 more hospital and 1 medical group, each named with a free account. Dr. Shields' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Martin Shields' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shields practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NYC Health + Hospitals/Kings County | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Martin Shields is one of 919 urologists in New York
Urology is Dr. Shields' primary specialty in the NPI Registry, under taxonomy code 208800000X. Dmand AI has Dr. Shields' licenses on file in 2 states: New York and Florida.
Specialties and state licenses
- Urology, New YorkPrimary
- Florida license
Urologists near Dr. Shields
Counts of urologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Martin Shields billed Medicare for 139 services in 2017
CMS data shows 139 Medicare services from Dr. Shields across 3 procedure codes in 2017. Medicare paid $3,564 for them. Every service was in an office.
Dr. Shields' Medicare services by type, 2016 to 2017
- 2016
- 2017
- Lab and pathology
- 2016: 1172017: 5850%
- Office and hospital visits
- 2016: 1202017: 5753%
- Surgery
- 2016: 492017: 2451%
Dr. Shields compared with the New York median for urologists, 2017
- Dr. Shields
- New York median
- Medicare services
- 139vs 84984% below
- Part D claims
- 451vs 58923% below
Medians across 885 urologists in New York with Dmand AI profiles that report each measure.
Dr. Shields' most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Martin Shields' patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Shields' median patient age at 70, with 19% women.
Dr. Shields' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women19%
- Men81%
Source: Dmand AI Patient Panel Data
Dr. John Martin Shields wrote 535 Medicare Part D claims in 2024
In 2024, Dr. Shields wrote 535 Medicare Part D claims for 188 patients. 99% of them were for generic drugs. CMS names the drug for 451 of them, across 5 drugs with 11 or more claims each, at $6,686 in total drug cost. In 2023, CMS named 364 claims across 6 drugs.
Dr. Shields' Part D claims by kind of drug, 2024
- Generic530 claims99%
- Brand-name and other5 claims1%
Dr. Shields' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Shields' Part D claims, 2024
- Antibiotics13%67 of 535 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3642024: 45124%
Drugs named by CMS: 5 in 2024, 6 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. John Martin Shields takes part in Medicare
Dr. Shields accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Martin Shields received $36,966 in industry payments from 2016 to 2025
CMS Open Payments shows 51 general payments to Dr. Shields from 17 drug and device companies from 2016 to 2025. Grants make up the largest share, 95% of the total. Boston Scientific Corporation paid the most, $35,481.
General payments to Dr. Shields by program year, 2016 to 2025
General payments to Dr. Shields by kind, 2016 to 2025
- Grants$35,00095%
- Food and beverage$1,9665%
Companies that paid Dr. Shields the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Martin Shields graduated from Royal College of Surgeons in Ireland - Medical University of Bahrain
Dr. Shields graduated from Royal College of Surgeons in Ireland - Medical University of Bahrain in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Martin Shields's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Martin Shields
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Martin Shields' NPI number?
Dr. John Martin Shields' NPI number is 1699091199. It was assigned on April 9, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. John Martin Shields?
Dr. John Martin Shields is a urologist in Brooklyn, New York. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. John Martin Shields practice?
Dr. Shields practices at 451 Clarkson Avenue, Brooklyn, NY 11203. Dr. Shields' primary practice is NYC Health + Hospitals/Kings County in Brooklyn, New York, part of NYC. Dmand AI also links Dr. Shields to 1 hospital and 1 medical group.
What is Dr. John Martin Shields' office phone number?
The practice phone on file for Dr. Shields is (718) 245-3901.
What is Dr. John Martin Shields' medical license number?
Dr. Shields holds New York license 286086, one of the licenses on file in 2 states.
Which states has Dr. John Martin Shields been licensed in?
Dmand AI has state licenses on file for Dr. Shields in New York and Florida.
Which hospitals is Dr. John Martin Shields affiliated with?
Dr. Shields practices at NYC Health + Hospitals/Kings County in Brooklyn, New York. Dr. Shields is also affiliated with NYC Health + Hospitals/Woodhull. Dmand AI links Dr. Shields to 1 more hospital.
What medical group is Dr. John Martin Shields part of?
Dr. Shields is linked to NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital. Dmand AI links Dr. Shields to 1 more medical group.
Does Dr. John Martin Shields accept Medicare?
Yes. CMS data shows Dr. Shields billed Medicare for 139 services in 2017, and Dr. Shields accepts Medicare assignment.
What services does Dr. John Martin Shields bill to Medicare?
In 2017, Dr. Shields' most billed Medicare services were lab and pathology test (81003), office visit, established patient (99213) and surgery: urinary system (51798).
Show 4 more questionsShow fewer questions
Where did Dr. John Martin Shields go to medical school?
Dr. Shields graduated from Royal College of Surgeons in Ireland - Medical University of Bahrain in 2003.
What drugs does Dr. John Martin Shields prescribe most?
In 2024 Medicare Part D data, Dr. Shields' most prescribed drugs by claims were Tamsulosin HCl, Finasteride and Ciprofloxacin HCl.
Has Dr. John Martin Shields received payments from drug or device companies?
CMS Open Payments shows $36,966 in general payments to Dr. Shields from 17 companies from 2016 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. John Martin Shields been practicing?
Dr. Shields graduated from medical school in 2003, 23 years ago.
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