Mark Oien, DO
NPI 1275971038 · Family Medicine Physician · Plymouth, MA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Oien, DO is a Family Medicine Physician provider in Plymouth, MA (NPI 1275971038).
Provider details
- NPI number
- 1275971038
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- MA265312 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-06-13
- Last updated
- 2024-10-01
- Certified
- 2024-10-01
Frequently asked questions
- What is Mark Oien's NPI number?
- Mark Oien's National Provider Identifier (NPI) is 1275971038, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Oien's specialty?
- Mark Oien is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Oien located?
- Mark Oien's practice location on file with NPPES is 275 Sandwich St, Plymouth, MA 02360-2183.
- What is Mark Oien's phone number?
- The practice phone number listed in the NPPES registry for Mark Oien is (508) 746-2000.
- Does Mark Oien accept Medicare?
- Mark Oien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Oien's NPI active?
- Yes — Mark Oien's NPI (1275971038) is active in the NPPES registry as of the last update on 2024-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.