James Malcolm Borthwick, MD
Psychiatry Physician · Princeton, NJ
James Malcolm Borthwick, MD is a psychiatry physician with a practice address in Princeton, New Jersey, and NPI 1366655052, issued on May 8, 2007. Check the license (New Jersey 25MA07660800, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- James Malcolm Borthwick
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 25MA07660800 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 166 Bunn Dr, Princeton, NJ 08540
- Phone
- (609) 688-9800
- Enumerated
- May 8, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (609) 921-8355
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,520 in New Jersey → Look up another NPI →
Also registered at 166 Bunn Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James Malcolm Borthwick 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 25MA07660800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average psychiatry physician in 2024
872 Medicare Part D claims for 58 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Bupropion Xl57 claims
- Clonazepam52 claims
- Lamotrigine41 claims
- Zolpidem Tartrate39 claims
- Diazepam38 claims
- Escitalopram Oxalate38 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.
James Malcolm Borthwick among 1,520 psychiatry physician records in New Jersey
James Malcolm Borthwick, MD is one of 1,520 psychiatry physician records with a practice address in New Jersey. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 38% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 46% of these records are
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
72 psychiatry physician records list a practice address in Princeton
They are 72 of the 1,622 NPPES records with a practice address in Princeton, and 1,520 psychiatry physician records in New Jersey.
All 1,520 in New Jersey → Every provider in Princeton → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Tunku Abubakar, MDPrinceton, NJ 085401275571515
- Irina Benaur, M.D.Princeton, NJ 085401477656783
- John Blake, M.D.Princeton, NJ 085401982705877
- Sonja Gray, M.D.Princeton, NJ 085401043304108
- Philippe Khouri, M.D.Princeton, NJ 085401689768830
- Jeffrey Mattes, MDPrinceton, NJ 085401104823806
- Iluminado Ortanez, M.D.Princeton, NJ 085401154415222
- Richard Prus-Wisniewski, M.D.Princeton, NJ 085401558455535
Common questions
What is James Malcolm Borthwick, MD's NPI number?
James Malcolm Borthwick, MD's National Provider Identifier (NPI) is 1366655052, issued on May 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is James Malcolm Borthwick, MD located?
The NPPES record lists a practice address at 166 Bunn Dr, Princeton, NJ, 08540. Phone: (609) 688-9800. Providers update this record themselves, so call before visiting.
How can I verify James Malcolm Borthwick, MD's license?
NPPES lists New Jersey license number 25MA07660800, 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 James Malcolm Borthwick, MD prescribe under Medicare Part D?
In 2024, James Malcolm Borthwick, MD had 872 Medicare Part D claims for 58 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.