Louis Swartz, MD
NPI 1619056421 · Specialist · Freeport, NY
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Swartz, MD is a Specialist provider in Freeport, NY (NPI 1619056421).
Provider details
- NPI number
- 1619056421
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 186021 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,950 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 1,036 | $87 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 416 | $131 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 175 | $126 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 162 | $377 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 150 | $67 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 96 | 26 |
| Dapagliflozin Propanediolbrand: Farxiga | 61 | 23 |
| Sodium Zirconium Cyclosilicatebrand: Lokelma | 34 | — |
| Furosemide | 33 | — |
| Calcitriol | 29 | — |
| Sevelamer Carbonate | 25 | 11 |
| Amlodipine Besylate | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$47 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-03
- Last updated
- 2008-04-10
Frequently asked questions
- What is Louis Swartz's NPI number?
- Louis Swartz's National Provider Identifier (NPI) is 1619056421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Swartz's specialty?
- Louis Swartz is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Louis Swartz located?
- Louis Swartz's practice location on file with NPPES is 155 W Merrick Rd, Freeport, NY 11520-3743.
- What is Louis Swartz's phone number?
- The practice phone number listed in the NPPES registry for Louis Swartz is (516) 546-2448.
- Does Louis Swartz accept Medicare?
- Louis Swartz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Swartz's NPI active?
- Yes — Louis Swartz's NPI (1619056421) is active in the NPPES registry as of the last update on 2008-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.