Matthew Gruse, MS, ACSM CEP
Matthew Gruse, MS, ACSM CEP is a provider specialising in Clinical Exercise Physiologist in Detroit, MI, registered under NPI 1235949009.
Getting there
The practice address on file is 4646 JOHN R ST, Detroit, MI 48201. 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
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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 Clinical Exercise Physiologist covers
A Clinical Exercise Physiologist is a health care professional who is trained to work with patients with chronic disease where exercise training has been shown to be of therapeutic benefit, including but not limited to cardiovascular and pulmonary disease, and metabolic disorders. NUCC Health Care Provider Taxonomy, code 224Y00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 224Y00000X | Clinical Exercise Physiologist | — | MI | primary |
| 224Y00000X | Clinical Exercise Physiologist | — | — |
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 | 1235949009 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 13, 2025 |
| Last updated | Jan 13, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MS, ACSM CEP |
| Practice address |
4646 JOHN R ST Detroit, MI 48201 (313) 576-1942 |
| Mailing address |
16920 RUDGATE ST Southgate, MI 48195 |
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 | 2 | 3 | 5 | 9 | 4 | 9 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 6 | 5 | 9 | 4 | 9 | 0 | 0 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.