Margaret Zak, CNM
Margaret Zak, CNM is a provider specialising in Advanced Practice Midwife in Portland, OR, registered under NPI 1003139189.
Getting there
Here is what surrounds this office in Portland, based on OpenStreetMap data collected Sep 7, 2026. Parking is available about 758 ft away. The nearest transit stop is 748 ft away, served by Southwest Barnes & 70th. A pharmacy sits 0.44 mi from the entrance (QFC), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.43 mi away.
Getting here and what is nearby
Transit West Burnside & Southwest Barnes 62 ft ~1 min
Transit Southwest Barnes & Barnes 77 ft ~1 min
Parking 480 ft ~2 min
Parking 608 ft ~3 min
Transit Southwest Barnes & 70th 748 ft ~3 min
Parking 758 ft ~3 min
Restaurant Joy Wok 0.32 mi ~7 min
7331 Southwest Barnes Road, Portland 97225
Mo-Fr 11:30-20:30; Sa,Su 16:00-20:30
Restaurant Pizza Nostra 0.34 mi ~7 min
Restaurant Biscuits Cafe 0.35 mi ~8 min
460 Southwest Miller Road, Portland 97225
Mo-Sa 06:30-14:30; Su 07:00-14:30
Coffee Starbucks 0.42 mi ~9 min
7515 Southwest Barnes Road, Portland 97225
Mo-Sa 05:00-19:00; Su 05:00-18:30
Coffee Starbucks 0.43 mi ~9 min
7525 Southwest Barnes Road, Portland 97225
Mo-Fr 05:30-19:00; Sa 06:00-19:00; Su 06:00-18:00
Grocery QFC 0.43 mi ~9 min
Pharmacy QFC 0.44 mi ~9 min
7525 Southwest Barnes Road, Portland 97225
Mo-Fr 09:00-20:00; Sa 09:00-18:00; Su 11:00-18:00
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 |
|---|---|---|
| 201050132NP | OR | Advanced Practice Midwife primary |
This provider holds licence 201050132NP issued in OR. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Advanced Practice Midwife covers
Advanced practice midwifery encompasses the independent provision of care during pregnancy, childbirth, and the postpartum period; sexual and reproductive health; gynecologic health; and family planning services, including preconception care. Midwives also provide primary care for individuals from adolescence throughout the lifespan as well as care for the healthy newborn during the first 28 days of life. Midwives provide initial and ongoing comprehensive assessment, diagnosis, and treatment. Midwifery care includes health promotion, disease prevention, risk assessment and management, and individualized wellness education and counseling. NUCC Health Care Provider Taxonomy, code 367A00000X
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 | 1003139189 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 3, 2010 |
| Last updated | Sep 18, 2012 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | CNM |
| Practice address |
9340 SW BARNES ROAD THE PRENATAL CLINIC, SUITE 102 Portland, OR 97225 (503) 216-2859 |
| Other identifiers |
500629871
· Medicaid (OR) |
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 | 1 | 3 | 9 | 1 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 3 | 9 | 1 | 7 |
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.