Ambooj Tiwari, MD
Ambooj Tiwari, MD is a Vascular Neurology Physician in Mission Hills, CA, registered under NPI 1609198779. This provider registers 2 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 15031 RINALDI ST, Mission Hills, CA 91345. 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 |
|---|---|---|
| 276012-1 | NY | Vascular Neurology Physician primary |
| 25MA09637400 | NJ | Vascular Neurology Physician |
| 276012-1 | NY | Vascular & Interventional Radiology… |
| 25MA09637400 | NJ | Vascular & Interventional Radiology… |
Licences are recorded in 2 states: NY, NJ. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Neurology
- PAC ID
- 3577783620
Enrolled in Medicare 3 times, across 3 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| New York | I20141013001461 | Practitioner - Neurology |
| New Jersey | I20161021000195 | Practitioner - Interventional Radiology |
| California | I20180827001056 | Practitioner - Neurosurgery |
Medicare enrolment is recorded as approved under the provider type Practitioner - Neurology. There are 3 separate enrolment records across 3 states (NY, NJ, CA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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.
Licensed in 2 states
This provider holds licences in 2 states: New Jersey and New York. Multi-state licensure often means the provider works near a state border, covers more than one office, or delivers care by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Vascular Neurology covers
Vascular Neurology is a subspecialty in the evaluation, prevention, treatment and recovery from vascular diseases of the nervous system. This subspecialty includes the diagnosis and treatment of vascular events of arterial or venous origin from a large number of causes that affect the brain or spinal cord such as ischemic stroke, intracranial hemorrhage, spinal cord ischemia and spinal cord hemorrhage. NUCC Health Care Provider Taxonomy, code 2084V0102X
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 | |
|---|---|---|---|---|
| 2084V0102X | Vascular Neurology Physician Vascular Neurology | 276012-1 | NY | primary |
| 2084V0102X | Vascular Neurology Physician Vascular Neurology | 25MA09637400 | NJ | |
| 2085R0204X | Vascular & Interventional Radiology Physician Vascular & Interventional Radiology | 276012-1 | NY | |
| 2085R0204X | Vascular & Interventional Radiology Physician Vascular & Interventional Radiology | 25MA09637400 | NJ |
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 | 1609198779 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 17, 2010 |
| Last updated | Aug 8, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
15031 RINALDI ST Mission Hills, CA 91345 (818) 365-8051 Fax (818) 897-4701 |
| Mailing address |
1511 3RD AVE STE 1000 Seattle, WA 98101 |
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 | 6 | 0 | 9 | 1 | 9 | 8 | 7 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 0 | 9 | 2 | 9 | 7 | 7 | 5 |
Sum = 71 · next multiple of 10 = 80 · 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.