William Chen , PA-C
Physician Assistant β’ Brooklyn, NY
150 55th St
Brooklyn, NY 112202508
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 January 10, 2019; this date does not establish years in practice.
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Published CMS data list 40 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Clopidogrel (Clopidogrel Bisulfate) β 40 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 75% of clinicians listed under Physician Assistant in Brooklyn, NY (2024, 502 clinicians with data). Median for this group: 139. Middle half: 42 to 504.
Fewer Part D prescriptions than 75% of clinicians listed under Physician Assistant in New York (2024, 6,800 clinicians with data). Median for this group: 172. Middle half: 46 to 640.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 12 in 2021 to 40 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021β2024.
Practice Location & Contact Primary Location
150 55th St
Brooklyn, NY 112202508
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Bronx, NY; Brooklyn, NY. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
112 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
$580 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 β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $378.08 across 8 records.
By nature of payment
- Food and Beverage: $378.08 across 8 records.
Reporting-company totals (3 largest of 5)
- Medtronic, Inc.: $163.63 across 1 record.
- Boston Scientific Corporation: $151.16 across 4 records.
- Exact Sciences Corporation: $23.27 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).
NPI first issued
2019
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, βDoes your provider accept Medicare as full payment?β
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)
William Chen 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 William Chen 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 Physician Assistant in Brooklyn, NY (2024, 502 clinicians with data). Median for this group: 139. Middle half: 42 to 504.
Fewer Part D prescriptions than 75% of clinicians listed under Physician Assistant in New York (2024, 6,800 clinicians with data). Median for this group: 172. Middle half: 46 to 640.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Physician Assistant in Brooklyn, NY (2024, 502 clinicians with data). Median for this group: $2,278. Middle half: $287 to $44,938.
A lower Part D drug cost than 65% of clinicians listed under Physician Assistant in New York (2024, 6,800 clinicians with data). Median for this group: $2,860. Middle half: $381 to $63,975.
1,279 active clinicians are listed under Physician Assistant with a practice address in Brooklyn, NY (15,558 in New York).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Brooklyn
5.6% of these 1,279 clinicians have the CMS telehealth indicator.
39.2% of these 1,279 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.
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 12 in 2021 to 40 in 2024.
- 2021: 12
- 2022: 54
- 2023: 51
- 2024: 40
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30-day fills
30-day fills went from 18 in 2021 to 112 in 2024.
- 2021: 18
- 2022: 74
- 2023: 107
- 2024: 112
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Part D drug cost
Part D drug cost went from $71 in 2021 to $580 in 2024.
- 2021: $71
- 2022: $803
- 2023: $6,957
- 2024: $580
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $347.92 in 2021 to $378.08 in 2025.
- 2021: $347.92
- 2022: $71.28
- 2023: $475.30
- 2024: $415.28
- 2025: $378.08
Sources: 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 Β· 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 β December 31, 2025): fewer than 11 records totaling $378.08.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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SYMPLICITY G3 | General | $163.63 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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ROTAPRO | General | $50.83 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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AVVIGO Guidance System | General | $44.06 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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FARAPULSE | General | $33.99 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $23.27 |
| Esperion Therapeutics, Inc. |
Food and Beverage
In-kind items and services
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NEXLETOL | General | $23.10 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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ACCOLADE SR | General | $22.28 |
| Chiesi USA, Inc. |
Food and Beverage
Cash or cash equivalent
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KENGREAL | General | $16.92 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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 |
|---|---|---|---|---|---|
| Clopidogrel | Clopidogrel Bisulfate | 40 | 3,353 | $580.37 | 39 |
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: 2023-05-25NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20191008002179
NY
7810228756
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
111 E 210th St
Bronx, NY 104672401
Phone: 7189208874
4802 10th Ave
Brooklyn, NY 112192916
Phone: 7182836000
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 - Psychiatric/Mental Health
Family Nurse Practitioner (Certified)
Hospitalist
Doctor of Medicine (M.D.)
Nurse Practitioner - Adult Health
Nurse Practitioner
Nurse Practitioner - Family
Family Nurse Practitioner
Emergency Medicine - Emergency Medical Services
Doctor of Osteopathic Medicine (D.O.)
Surgery - Surgical Critical Care
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 150 55TH ST, BROOKLYN, NY 112202508 (Tel: 7186307000)
Registered at 111 E 210TH ST, BRONX, NY 104672401 (Tel: 7189204321)
Registered at 775 57TH ST, BROOKLYN, NY 112203505 (Tel: 7184396163)
Recorded as WILLIAM CHEN, PA-C
NPI status registered as active in NPPES database
Registered at 775 57TH ST, BROOKLYN, NY 112203505 (Tel: 7184396163)
Registered at 44 SCARBORO AVE, STATEN ISLAND, NY 103053119 (Tel: 6464317876)
Recorded as WILLIAM CHEN
Physician Assistant (license number reported to NPPES: NY 023148)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Brooklyn
- Nehemi Joachim, PA-C
- Nurun Begum, PA
- Jessica Lambdin, PA-C
- Nigel Awai
- Keith Ko, PA
- Yan Hong Zheng, PA
Mailing Address
775 57th St
Brooklyn, NY 112203505
Phone: 7184396163