Mostafa Tabassomi, MD
Mostafa Tabassomi, MD is a Pulmonary Disease Physician in Valencia, CA, registered under NPI 1003042342. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Valencia, based on OpenStreetMap data collected Sep 1, 2026. Parking is available about 533 ft away. There is EV charging 0.30 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 0.22 mi away. If you arrive early, there is a coffee shop 0.41 mi away.
Getting here and what is nearby
Parking 521 ft ~2 min
Parking 533 ft ~3 min
Parking 533 ft ~3 min
Transit 0.22 mi ~5 min
Grocery Whole Foods Market 0.25 mi ~5 min
24130 Valencia Boulevard, Santa Clarita 91355
Mo-Su 07:00-22:00
Restaurant Bearies Acai 0.29 mi ~6 min
24201 Valencia Boulevard, Valencia 91355
Mo-Th 11:00-20:00; Fr-Sa 11:00-21:00; Su 11:00-19:00
EV charging 0.30 mi ~6 min
Coffee Teaspoon 0.36 mi ~8 min
Restaurant Lazy Dog 0.36 mi ~8 min
24201 Valencia Boulevard, Valencia 91355
Coffee The Coffee Bean & Tea Leaf 0.41 mi ~9 min
Coffee Starbucks 0.41 mi ~9 min
Restaurant Chick-fil-A 0.47 mi ~10 min
24180 Magic Mountain Parkway, Santa Clarita 91355
Mo-Sa 06:30-22:00; Su off
Convenience Shell 0.50 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A106160 | CA | Internal Medicine Physician |
| A106160 | CA | Critical Care Medicine (Internal… |
| A106160 | CA | Pulmonary Disease Physician primary |
This provider holds licence A106160 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
- Practitioner - Pulmonary Disease
- PAC ID
- 2365582913
- Enrollment ID
- I20091214000067
Medicare enrolment is recorded as approved under the provider type Practitioner - Pulmonary Disease. 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 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 | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | A106160 | CA | |
| 207RC0200X | Critical Care Medicine (Internal Medicine) Physician Critical Care Medicine | A106160 | CA | |
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | A106160 | CA | primary |
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 | 1003042342 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 1, 2009 |
| Last updated | Feb 6, 2023 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
23838 VALENCIA BLVD STE 304 Valencia, CA 91355 (661) 430-9030 Fax (661) 430-9020 |
| Mailing address |
25716 HOLLY OAK CT Valencia, CA 91381 |
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 | 0 | 0 | 3 | 0 | 4 | 2 | 3 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 4 | 4 | 3 | 8 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
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.