Frederick Rosen, MD
Frederick Rosen, MD is a Pediatric Otolaryngology Physician in Brentwood, CA, registered under NPI 1063502839. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1181 CENTRAL BLVD STE B, Brentwood, CA 94513. 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 |
|---|---|---|
| A84955 | CA | Pediatric Otolaryngology Physician primary |
| A84955 | CA | Otolaryngology Physician |
This provider holds licence A84955 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 - Preventive Medicine
- PAC ID
- 5698746972
Medicare enrolment is recorded as approved under the provider type Practitioner - Preventive Medicine. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Pediatric Otolaryngology covers
A pediatric otolaryngologist has special expertise in the management of infants and children with disorders that include congenital and acquired conditions involving the aerodigestive tract, nose and paranasal sinuses, the ear and other areas of the head and neck. The pediatric otolaryngologist has special skills in the diagnosis, treatment, and management of childhood disorders of voice, speech, language and hearing. NUCC Health Care Provider Taxonomy, code 207YP0228X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207YP0228X | Pediatric Otolaryngology Physician Pediatric Otolaryngology | A84955 | CA | primary |
| 207Y00000X | Otolaryngology Physician | A84955 | 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-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 | 1063502839 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 13, 2006 |
| Last updated | Mar 19, 2015 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
1181 CENTRAL BLVD STE B Brentwood, CA 94513 (925) 463-0336 Fax (925) 463-1387 |
| Mailing address |
PO BOX 6177 Alameda, CA 94501 |
| Other identifiers |
A84955
· LICENSE (CA) ZZZ21406Z · MEDICARE GR |
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 | 6 | 3 | 5 | 0 | 2 | 8 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 3 | 3 | 1 | 0 | 4 | 8 | 6 |
Sum = 51 · next multiple of 10 = 60 · 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.