Eiler Sommerhaug, M.D.
Eiler Sommerhaug, M.D. is a Plastic and Reconstructive Surgery Physician in Petaluma, CA, registered under NPI 1659353555. 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 1383 N MCDOWELL BLVD SUITE 110, Petaluma, CA 94954. 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 |
|---|---|---|
| G81043 | CA | Plastic and Reconstructive Surgery… primary |
This provider holds licence G81043 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 - Plastic And Reconstructive Surgery
- PAC ID
- 7911097902
Medicare enrolment is recorded as approved under the provider type Practitioner - Plastic And Reconstructive Surgery. 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 Plastic and Reconstructive Surgery covers
A surgeon who specializes in plastic and reconstructive surgery. NUCC Health Care Provider Taxonomy, code 2086S0122X
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 | 1659353555 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 16, 2005 |
| Last updated | Nov 4, 2008 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
1383 N MCDOWELL BLVD SUITE 110 Petaluma, CA 94954 (707) 766-9852 Fax (707) 766-1749 |
| Mailing address |
PO BOX 751375 Petaluma, CA 75137 |
| Other identifiers |
GR002104R
· MEDI-CAL (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 | 6 | 5 | 9 | 3 | 5 | 3 | 5 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 1 | 9 | 6 | 5 | 6 | 5 | 1 |
Sum = 65 · next multiple of 10 = 70 · 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.