Brian L. Shaffer, MD
Internal Medicine Physician · Lawrenceville, NJ
Brian L. Shaffer, MD is an internal medicine physician with a practice address in Lawrenceville, New Jersey, and NPI 1447247689, issued on Oct 3, 2005. Check the license (New Jersey 25MA05504600, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Brian L. Shaffer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 25MA05504600 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 133 Franklin Corner RD, Lawrenceville, NJ 08648
- Phone
- (609) 436-5900
- Enumerated
- Oct 3, 2005
- Record last updated
- Apr 2, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (609) 452-0222
- Medicare enrollment
- Enrolled (PECOS I20050712000674); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,632 in New Jersey → Look up another NPI →
Also registered at 133 Franklin Corner RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Diane McMahon, LPC, RNProfessional Counselor1609179977
Verify Brian L. Shaffer 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 25MA05504600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,716 Medicare Part D claims for 141 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 85 claims were for opioids.
Most prescribed
- Amlodipine Besylate100 claims
- Lorazepam84 claims
- Atorvastatin Calcium75 claims
- Alprazolam56 claims
- Sertraline Hcl53 claims
- Rosuvastatin Calcium48 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: $30.76
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Brian L. Shaffer among 4,632 internal medicine physician records in New Jersey
Brian L. Shaffer, MD is one of 4,632 internal medicine physician records with a practice address in New Jersey. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1985 · median 2000 among the 3,132 with a school on file
- Record last updated2015 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 internal medicine physician records list a practice address in Lawrenceville
They are 27 of the 693 NPPES records with a practice address in Lawrenceville, and 4,632 internal medicine physician records in New Jersey.
All 4,632 in New Jersey → Every provider in Lawrenceville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michael Dash, M.D.Lawrenceville, NJ 086481033164959
- Bharat Desai, MDLawrenceville, NJ 086481992701189
- Shari Diamond, D.O.Lawrenceville, NJ 086481912926254
- Richard Friedland, MDLawrenceville, NJ 086481437157583
- Paul Goldberg, M.D.Lawrenceville, NJ 086481316943574
- Eric Gomes, M.D.Lawrenceville, NJ 086481205831807
- Peter Lee, M.D.Lawrenceville, NJ 086481225081334
- Kimberly Osias, MDLawrenceville, NJ 086481922006899
Common questions
What is Brian L. Shaffer, MD's NPI number?
Brian L. Shaffer, MD's National Provider Identifier (NPI) is 1447247689, issued on Oct 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Brian L. Shaffer, MD located?
The NPPES record lists a practice address at 133 Franklin Corner RD, Lawrenceville, NJ, 08648. Phone: (609) 436-5900. Providers update this record themselves, so call before visiting.
How can I verify Brian L. Shaffer, MD's license?
NPPES lists New Jersey license number 25MA05504600, 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 Brian L. Shaffer, MD prescribe under Medicare Part D?
In 2024, Brian L. Shaffer, MD had 1,716 Medicare Part D claims for 141 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.