Margaret Matusofsky, M.S.
Margaret Matusofsky, M.S. is a provider specialising in Audiologist-Hearing Aid Fitter in Saint Louis, MO, registered under NPI 1831235233. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 4560 CLAYTON AVE, Saint Louis, MO 63110. 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 |
|---|---|---|
| 2004025148 | MO | Audiologist-Hearing Aid Fitter primary |
| 2004022971 | MO | Audiologist |
| 2004022971 | MO | Assistive Technology Practitioner… |
| 2004022971 | MO | Assistive Technology Supplier Audiologist |
This provider holds licence 2004025148 issued in MO. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Audiologist-Hearing Aid Fitter covers
An audiologist/hearing aid fitter is the professional who specializes in evaluating and treating people with hearing loss, conducts a wide variety of tests to determine the exact nature of an individual's hearing problem, presents a variety of treatment options to patients, dispenses and fits hearing aids, administers tests of balance to evaluate dizziness and provides hearing rehabilitation training. This classification should be used where individuals are licensed as "audiologist-hearing aid fitters" as opposed to states that license individuals as "audiologists". NUCC Health Care Provider Taxonomy, code 237600000X
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 237600000X | Audiologist-Hearing Aid Fitter | 2004025148 | MO | primary |
| 231H00000X | Audiologist | 2004022971 | MO | |
| 231HA2400X | Assistive Technology Practitioner Audiologist Assistive Technology Practitioner | 2004022971 | MO | |
| 231HA2500X | Assistive Technology Supplier Audiologist Assistive Technology Supplier | 2004022971 | MO |
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 | 1831235233 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 30, 2007 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.S. |
| Practice address |
4560 CLAYTON AVE Saint Louis, MO 63110 (314) 977-0136 Fax (314) 977-0016 |
| Mailing address |
310 RIDGE OAK CT Ballwin, MO 63021 |
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 | 3 | 1 | 2 | 3 | 5 | 2 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 6 | 1 | 4 | 3 | 1 | 2 | 6 |
Sum = 57 · next multiple of 10 = 60 · 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.