NPPES file of Aug 9, 2026

Gigi Diamond, M.D.

Infectious Disease Physician · Livingston, NJ

Gigi Diamond, M.D. is an infectious disease physician with a practice address in Livingston, New Jersey, and NPI 1295757359, issued on Jul 24, 2006. Check the license (New Jersey MA045093, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1295757359
Name
Gigi Diamond
Credential
M.D.
Primary taxonomy
Infectious Disease Physician 207RI0200X
License number
MA045093 NJ
Self-reported in NPPES; status is on the state search
Practice location
349 E Northfield RD, Livingston, NJ 07039
Phone
(973) 597-0900
Enumerated
Jul 24, 2006
Record last updated
Dec 4, 2009 (not updated in 17 years: call before relying on the address or phone)
Fax
(973) 597-0910
Medicare enrollment
Enrolled (PECOS I20110322000396); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest infectious disease physician records → All 375 in New Jersey → Look up another NPI →

Also registered at 349 E Northfield RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Anthony Botti, M.D.Hematology & Oncology Physician1598787640
  2. Diana Bravo, LCSWClinical Social Worker1912478793
  3. Steven Cohen, M.D.Ophthalmology Physician1235133000
  4. Betty Ditillo, APNAdult Health Nurse Practitioner1619958659
  5. William Gerard, DMDGeneral Practice Dentistry1881721033
  6. Michael Gutkin, M.D.Nephrology Physician1033152244

Verify Gigi Diamond in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
    Search for license MA045093    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the New Jersey license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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17% fewer Medicare Part D claims than the average infectious disease physician in 2024

571 Medicare Part D claims for 62 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 79% of claims.

  1. Gigi Diamond571
  2. Specialty average689

Most prescribed

  1. Biktarvy326 claims
  2. Tivicay36 claims
  3. Odefsey21 claims
  4. Descovy19 claims
  5. Prezcobix13 claims
  6. Ceftriaxone12 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: $366.06

17 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.

  1. Gigi Diamond$366.06
  2. Specialty average$4,362.19

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Livingston Subspecialty Group, P.A.Livingston, NJ

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gigi Diamond among 375 infectious disease physician records in New Jersey

Gigi Diamond, M.D. 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 fileYes · 76% of these records are
  • Graduated1982 · median 2000 among the 285 with a school on file
  • Record last updated2009 · 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 Livingston → Infectious Disease Physician nationwide →

The 8 infectious disease physician records with the nearest ZIP codes

  1. Hema Dholakia, M.D.Livingston, NJ 070391710189741
  2. Marjut Kokkola-Korpela, M.D.Livingston, NJ 070391316387376
  3. Lalithaa Thirunavukarasu Murugan, MDLivingston, NJ 070391609352111
  4. Peter Weiner, M.D.Millburn, NJ 070411972691814
  5. Hetty Waskin, M.D.Kenilworth, NJ 070331447424759
  6. Michelle Borowski, D.O.Kearny, NJ 070321902027790
  7. Avisheh Forouzesh, MDHoboken, NJ 070301346273778
  8. Jean Messihi, M.D.Hoboken, NJ 070301174537419

Common questions

What is Gigi Diamond, M.D.'s NPI number?

Gigi Diamond, M.D.'s National Provider Identifier (NPI) is 1295757359, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Gigi Diamond, M.D. located?

The NPPES record lists a practice address at 349 E Northfield RD, Livingston, NJ, 07039. Phone: (973) 597-0900. Providers update this record themselves, so call before visiting.

How can I verify Gigi Diamond, M.D.'s license?

NPPES lists New Jersey license number MA045093, 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 Gigi Diamond, M.D. prescribe under Medicare Part D?

In 2024, Gigi Diamond, M.D. had 571 Medicare Part D claims for 62 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.