Hillary Diamond, M.D.
NPI 1902967011 · Geriatric Medicine (Internal Medicine) Physician · Northport, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hillary Diamond, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Northport, NY (NPI 1902967011).
Provider details
- NPI number
- 1902967011
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 196450 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
226 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 152 | $144 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 37 | $102 |
| Administration of Influenza Virus VaccineG0008 | 20 | $36 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 17 | $145 |
Typical Medicare-allowed amounts for these services range $36–$145 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 524 | 200 |
| Amlodipine Besylate | 359 | 129 |
| Losartan Potassium | 244 | 80 |
| Metformin Hcl | 170 | 66 |
| Carvedilol | 143 | 57 |
| Lisinopril | 140 | 49 |
| Metoprolol Succinate | 124 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-12
- Last updated
- 2020-06-01
- Certified
- 2020-06-01
Frequently asked questions
- What is Hillary Diamond's NPI number?
- Hillary Diamond's National Provider Identifier (NPI) is 1902967011, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hillary Diamond's specialty?
- Hillary Diamond is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Hillary Diamond located?
- Hillary Diamond's practice location on file with NPPES is 99 Sea Cove Rd, Northport, NY 11768-1850.
- What is Hillary Diamond's phone number?
- The practice phone number listed in the NPPES registry for Hillary Diamond is (631) 300-0585.
- Does Hillary Diamond accept Medicare?
- Hillary Diamond is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hillary Diamond's NPI active?
- Yes — Hillary Diamond's NPI (1902967011) is active in the NPPES registry as of the last update on 2020-06-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.