William Farrer, MD
Infectious Disease Physician · Elizabeth, NJ
William Farrer, MD is an infectious disease physician with a practice address in Elizabeth, New Jersey, and NPI 1114997012, issued on Jan 24, 2006. Check the license (New Jersey MA37417, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Farrer
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- MA37417 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 240 Williamson St Ste 401, Elizabeth, NJ 07202
- Phone
- (908) 282-0500
- Enumerated
- Jan 24, 2006
- Record last updated
- Dec 23, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (908) 282-1482
- Medicaid ID
- 1332201 NJ
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 375 in New Jersey → Look up another NPI →
Verify William Farrer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license MA37417Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average infectious disease physician in 2024
399 Medicare Part D claims for 28 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 58% of claims.
Most prescribed
- Symtuza60 claims
- Tivicay39 claims
- Biktarvy32 claims
- Rosuvastatin Calcium31 claims
- Prezcobix24 claims
- Efavirenz-Emtric-Tenofov Disop21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $31.67
2 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
William Farrer among 375 infectious disease physician records in New Jersey
William Farrer, MD is one of 375 infectious disease physician records with a practice address in New Jersey. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 49% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2019 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in New Jersey
There are 375 infectious disease physician records in New Jersey.
All 375 in New Jersey → Every provider in Elizabeth → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Syed Jaffry, MDElizabeth, NJ 072021487615050
- Clark Sherer, MDElizabeth, NJ 072021629048541
- Ana Rodriguez, M.D.Newark, NJ 071141710104922
- Michelle Evans-Pontrelli, MDNewark, NJ 071121013476894
- Lynne Fakeye, M.D.Newark, NJ 071121982066619
- Madhu Suryadevara, M.D.Newark, NJ 071121578906772
- Raj PatelIrvington, NJ 071111457710980
- Antonia Lopresti, MDNutley, NJ 071101154259976
Common questions
What is William Farrer, MD's NPI number?
William Farrer, MD's National Provider Identifier (NPI) is 1114997012, issued on Jan 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Farrer, MD located?
The NPPES record lists a practice address at 240 Williamson St Ste 401, Elizabeth, NJ, 07202. Phone: (908) 282-0500. Providers update this record themselves, so call before visiting.
How can I verify William Farrer, MD's license?
NPPES lists New Jersey license number MA37417, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Farrer, MD prescribe under Medicare Part D?
In 2024, William Farrer, MD had 399 Medicare Part D claims for 28 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.