Michael Mendelson, M.D.
NPI 1043323835 · Internal Medicine Physician · Port Jefferson Station, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Mendelson, M.D. is a Internal Medicine Physician provider in Port Jefferson Station, NY (NPI 1043323835).
Provider details
- NPI number
- 1043323835
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 110115 (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
1,493 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 1,493 | $9 |
Typical Medicare-allowed amounts for these services range $9–$9 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-16
- Last updated
- 2021-05-24
- Certified
- 2021-05-24
Frequently asked questions
- What is Michael Mendelson's NPI number?
- Michael Mendelson's National Provider Identifier (NPI) is 1043323835, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Mendelson's specialty?
- Michael Mendelson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Mendelson located?
- Michael Mendelson's practice location on file with NPPES is 5360 Nesconset Hghy, Port Jefferson Station, NY 11776-2018.
- What is Michael Mendelson's phone number?
- The practice phone number listed in the NPPES registry for Michael Mendelson is (631) 331-3200.
- Does Michael Mendelson accept Medicare?
- Michael Mendelson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Mendelson's NPI active?
- Yes — Michael Mendelson's NPI (1043323835) is active in the NPPES registry as of the last update on 2021-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.