MARK A. PETROFF, MD. PC
MARK A. PETROFF, MD. PC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1275607616, based in Lake Oswego, OR. It is classified under Ambulatory Surgical Clinic/Center.
Getting there
The practice address on file is 17720 JEAN WAY STE 100, Lake Oswego, OR 97035. 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 |
|---|---|---|
| 07-1550 | OR | Ambulatory Surgical Clinic/Center primary |
This provider holds licence 07-1550 issued in OR. 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 - Ambulatory Surgical Center
- PAC ID
- 5890709059
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Ambulatory Surgical Center. 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 Ambulatory Surgical covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QA1903X
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 | 1275607616 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Nov 18, 2006 |
| Last updated | May 7, 2008 |
| Status | Active |
| Practice address |
17720 JEAN WAY STE 100 Lake Oswego, OR 97035 (503) 635-4886 Fax (503) 635-1655 |
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 | 2 | 7 | 5 | 6 | 0 | 7 | 6 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 5 | 5 | 3 | 0 | 5 | 6 | 2 |
Sum = 54 · next multiple of 10 = 60 · 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.