Karen Mcmahon
Karen Mcmahon is a Pediatric Physical Therapist in Bardonia, NY, registered under NPI 1811141153. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 22 JOSEPH LN, Bardonia, NY 10954. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 016955-1 | NY | Pediatric Physical Therapist primary |
This provider holds licence 016955-1 issued in NY. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Physical Therapist In Private Practice
- PAC ID
- 0547482945
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| New York | I20141120000861 | Practitioner - Physical Therapist In Private Practice |
| South Carolina | I20240411001145 | Practitioner - Physical Therapist In Private Practice |
Medicare enrolment is recorded as approved under the provider type Practitioner - Physical Therapist In Private Practice. There are 2 separate enrolment records across 2 states (NY, SC). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Pediatrics covers
A licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Pediatric Physical Therapy, who has demonstrated specialized knowledge and skill in anatomy, histology, including embryonic development, genetics, biomechanics, neurological function, neuroscience, and pathology, behavioral sciences, and understanding of diseases or conditions that necessitate physical therapy care, that affect systems that in turn necessitate physical therapy care (comorbidities), and that influence the type of intervention that can be given. NUCC Health Care Provider Taxonomy, code 2251P0200X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1811141153 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 13, 2008 |
| Last updated | Mar 6, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Practice address |
22 JOSEPH LN Bardonia, NY 10954 (845) 598-0517 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 8 | 1 | 1 | 1 | 4 | 1 | 1 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 2 | 1 | 2 | 4 | 2 | 1 | 1 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.