DAVID D. CHI, M.D., F.A.C.S., A MEDICAL CORP.
DAVID D. CHI, M.D., F.A.C.S., A MEDICAL CORP. is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1154649796, based in Thousand Oaks, CA. The organization lists 2 taxonomy classifications, with Surgical Oncology Physician recorded as primary.
Getting there
The practice address on file is 555 MARIN STREET SUITE 210, Thousand Oaks, CA 91360. 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 |
|---|---|---|
| G84570 | CA | Surgical Oncology Physician |
| G84570 | CA | Surgery Physician |
This provider holds licence G84570 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Part B Supplier - Clinic/group Practice
- PAC ID
- 5991834558
- Enrollment ID
- O20100520000578
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Surgical Oncology covers
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research. NUCC Health Care Provider Taxonomy, code 2086X0206X
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 | |
|---|---|---|---|---|
| 2086X0206X | Surgical Oncology Physician Surgical Oncology | — | — | primary |
| 2086X0206X | Surgical Oncology Physician Surgical Oncology | G84570 | CA | |
| 208600000X | Surgery Physician | G84570 | 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 | 1154649796 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | May 6, 2010 |
| Last updated | Jul 20, 2011 |
| Status | Active |
| Practice address |
555 MARIN STREET SUITE 210 Thousand Oaks, CA 91360 (805) 497-7785 Fax (805) 497-7728 |
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 | 1 | 5 | 4 | 6 | 4 | 9 | 7 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 1 | 4 | 3 | 4 | 9 | 7 | 9 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
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.