DAVID MESCHER MD & GEORGE C YU MD
DAVID MESCHER MD & GEORGE C YU MD is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1417988395, based in Oxnard, CA. It is classified under Pulmonary Disease Physician.
Getting there
The practice address on file is 1700 N ROSE AVE STE 350, Oxnard, CA 93030. 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 |
|---|---|---|
| G280660 | CA | Pulmonary Disease Physician primary |
| G67821 | CA | Pulmonary Disease Physician |
| G44905 | CA | Pulmonary Disease Physician |
This provider holds licence G280660 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 Pulmonary Disease covers
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs. NUCC Health Care Provider Taxonomy, code 207RP1001X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | G280660 | CA | primary |
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | G67821 | CA | |
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | G44905 | CA |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1417988395 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 6, 2006 |
| Last updated | Jul 21, 2022 |
| Status | Active |
| Practice address |
1700 N ROSE AVE STE 350 Oxnard, CA 93030 (805) 485-7877 Fax (805) 981-4472 |
| Mailing address |
1700 N ROSE AVE STE 280 Oxnard, CA 93030 |
| Other identifiers |
GR0008100
· Medicaid (CA) |
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 | 1 | 7 | 9 | 8 | 8 | 3 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 2 | 7 | 9 | 8 | 7 | 3 | 9 |
Sum = 75 · next multiple of 10 = 80 · check digit = 5 · actual last digit = 5
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.