Hillary Diamond, M.D.
Geriatric Medicine (Internal Medicine) Physician · Northport, NY
Hillary Diamond, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Northport, New York, and NPI 1902967011, issued on Dec 12, 2006. Check the license (New York 196450, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Hillary Diamond
- Credential
- M.D.
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 196450 NY
Self-reported in NPPES; status is on the state search - Practice location
- 99 Sea Cove RD, Northport, NY 11768
- Phone
- (631) 300-0585
- Enumerated
- Dec 12, 2006
- Record last updated
- Jun 1, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (308) 888-8554
- Medicare enrollment
- Enrolled (PECOS I20050201001009); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 508 in New York → Look up another NPI →
Verify Hillary Diamond in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 196450Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
5,246 Medicare Part D claims for 479 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Atorvastatin Calcium524 claims
- Amlodipine Besylate359 claims
- Losartan Potassium244 claims
- Metformin Hcl170 claims
- Carvedilol143 claims
- Lisinopril140 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.
Bills Medicare through one group practice
- Advantagecare Physicians PCJamaica, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hillary Diamond among 508 geriatric medicine (internal medicine) physician records in New York
Hillary Diamond, M.D. is one of 508 geriatric medicine (internal medicine) physician records with a practice address in New York. 75% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 47% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated1992 · median 1998 among the 272 with a school on file
- Record last updated2020 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in New York
There are 508 geriatric medicine (internal medicine) physician records in New York.
All 508 in New York → Every provider in Northport → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Joanne Holland, M.D.Northport, NY 117681225090582
- Linda Honkanen, MDNorthport, NY 117681538112768
- Younghee Limb, M.D.Northport, NY 117681811961766
- Edward Mack, MDNorthport, NY 117681134148836
- Sabahat Mahmood, MDNorthport, NY 117681437112208
- Shing-Shing Yeh, MD, PHDNorthport, NY 117681821051798
- Adewale Plumptre, MDOakdale, NY 117691861063547
- Manpreet KaurOyster Bay, NY 117711134688088
Common questions
What is Hillary Diamond, M.D.'s NPI number?
Hillary Diamond, M.D.'s National Provider Identifier (NPI) is 1902967011, issued on Dec 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Hillary Diamond, M.D. located?
The NPPES record lists a practice address at 99 Sea Cove RD, Northport, NY, 11768. Phone: (631) 300-0585. Providers update this record themselves, so call before visiting.
How can I verify Hillary Diamond, M.D.'s license?
NPPES lists New York license number 196450, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hillary Diamond, M.D. prescribe under Medicare Part D?
In 2024, Hillary Diamond, M.D. had 5,246 Medicare Part D claims for 479 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.