Louis Greenblatt, DO
NPI 1891710307 · Geriatric Medicine (Family Medicine) Physician · Hauppauge, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Greenblatt, DO is a Geriatric Medicine (Family Medicine) Physician provider in Hauppauge, NY (NPI 1891710307).
Provider details
- NPI number
- 1891710307
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- 156102 (NY)
Specialties & taxonomies
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
3,920 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 955 | $104 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 600 | $146 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 484 | $9 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 298 | $18 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 266 | $147 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 98 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 332 | 107 |
| Atorvastatin Calcium | 285 | 82 |
| Amlodipine Besylate | 236 | 66 |
| Losartan Potassium | 227 | 61 |
| Metoprolol Succinate | 163 | 46 |
| Lisinopril | 156 | 43 |
| Alprazolam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-13
- Last updated
- 2010-08-24
Frequently asked questions
- What is Louis Greenblatt's NPI number?
- Louis Greenblatt's National Provider Identifier (NPI) is 1891710307, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Greenblatt's specialty?
- Louis Greenblatt is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Greenblatt located?
- Louis Greenblatt's practice location on file with NPPES is 533 Route 111, Hauppauge, NY 11788-4350.
- What is Louis Greenblatt's phone number?
- The practice phone number listed in the NPPES registry for Louis Greenblatt is (631) 366-1788.
- Does Louis Greenblatt accept Medicare?
- Louis Greenblatt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Greenblatt's NPI active?
- Yes — Louis Greenblatt's NPI (1891710307) is active in the NPPES registry as of the last update on 2010-08-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.