Michael Marchand-gareau, M.D.
Michael Marchand-gareau, M.D. is a Glaucoma Specialist (Ophthalmology) Physician in Sacramento, CA, registered under NPI 1942840558.
Getting there
The practice address on file is MICHAEL MARCHAND - UC DAVIS EYE CENTER 4860 Y STREET, SUITE 2400, Sacramento, CA 95817. 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 |
|---|---|---|
| A169323 | CA | Glaucoma Specialist (Ophthalmology)… primary |
This provider holds licence A169323 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 Glaucoma Specialist covers
An ophthalmologist who specializes in the treatment of glaucoma and other disorders related to increased intraocular pressure and optic nerve damage. This specialty involves the medical and surgical treatment of these conditions. NUCC Health Care Provider Taxonomy, code 207WX0009X
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 | 1942840558 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 11, 2020 |
| Last updated | Jul 24, 2020 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
MICHAEL MARCHAND - UC DAVIS EYE CENTER 4860 Y STREET, SUITE 2400 Sacramento, CA 95817 (916) 734-6891 Fax (916) 734-6197 |
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 | 9 | 4 | 2 | 8 | 4 | 0 | 5 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 8 | 2 | 7 | 4 | 0 | 5 | 1 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
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.