Michael Gewirtz, MD
NPI 1093739534 · Internal Medicine Physician · West Islip, NY
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Gewirtz, MD is a Internal Medicine Physician provider in West Islip, NY (NPI 1093739534).
Provider details
- NPI number
- 1093739534
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 173953 (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
694 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 | 337 | $103 |
| Detection Test By Immunoassay Technique for Severe Acute Respiratory Syndrome Coronavirus and Influenza87428 | 120 | $68 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 59 | $128 |
| Automated Urinalysis Test81003 | 54 | $2 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 54 | $145 |
| Detection Test By Immunoassay With Direct Visual Observation for Streptococcus, Group a (strep)87880 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 62 | 57 |
| Doxycycline Hyclate | 56 | 55 |
| Methylprednisolone | 55 | 54 |
| Doxycycline Monohydrate | 53 | 49 |
| Amoxicillin | 42 | 41 |
| Cefdinir | 38 | 35 |
| Azithromycin | 29 | 27 |
| Neomycin/Polymyxin B/Hydrocortbrand: Neomycin-Polymyxin-Hc |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-27
- Last updated
- 2009-02-13
Frequently asked questions
- What is Michael Gewirtz's NPI number?
- Michael Gewirtz's National Provider Identifier (NPI) is 1093739534, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Gewirtz's specialty?
- Michael Gewirtz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Gewirtz located?
- Michael Gewirtz's practice location on file with NPPES is 1000 Montauk Hwy, West Islip, NY 11795-4927.
- What is Michael Gewirtz's phone number?
- The practice phone number listed in the NPPES registry for Michael Gewirtz is (631) 376-3000.
- Does Michael Gewirtz accept Medicare?
- Michael Gewirtz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Gewirtz's NPI active?
- Yes — Michael Gewirtz's NPI (1093739534) is active in the NPPES registry as of the last update on 2009-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.