Michael Grammas, PA
Michael Grammas, PA is a provider specialising in Independent Duty Corpsman in Newport Beach, CA, registered under NPI 1497345904. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 20072 SW BIRCH ST STE 190, Newport Beach, CA 92660. 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 |
|---|---|---|
| 152871 | CA | Paramedic |
| 152871 | CA | Emergency Medical Services (Emergency… |
This provider holds licence 152871 issued in CA. 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 Independent Duty Corpsman covers
A Navy Independent Duty Corpsman (IDC) is an active duty Sailor who has successfully completed one of the Navy's specific IDC training programs. IDCs are formally trained and educated to perform primary medical care and minor surgical services in a variety of health care and non-health care settings worldwide under indirect physician supervision. IDCs provide care to Department of Defense operational forces and other supporting forces such as contractors and foreign nationals. NUCC Health Care Provider Taxonomy, code 1710I1002X
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 | |
|---|---|---|---|---|
| 1710I1002X | Independent Duty Corpsman Independent Duty Corpsman | — | — | primary |
| 146L00000X | Paramedic | 152871 | CA | |
| 207PE0004X | Emergency Medical Services (Emergency Medicine) Physician Emergency Medical Services | 152871 | CA | |
| 363A00000X | Physician Assistant | — | FL |
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 | 1497345904 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 20, 2021 |
| Last updated | Feb 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | PA |
| Practice address |
20072 SW BIRCH ST STE 190 Newport Beach, CA 92660 (949) 235-7735 |
| Mailing address |
27762 ANTONIO PKWY L1 #325 Ladera Ranch, CA 92694 |
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 | 4 | 9 | 7 | 3 | 4 | 5 | 9 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 9 | 7 | 6 | 4 | 1 | 9 | 0 |
Sum = 66 · next multiple of 10 = 70 · check digit = 4 · actual last digit = 4
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.