Mark S Obrien MD PLC
NPI 1609018233 · Internal Medicine Physician · Grand Rapids, MI
Mark S Obrien MD PLC is a Internal Medicine Physician organization in Grand Rapids, MI (NPI 1609018233).
Provider details
- NPI number
- 1609018233
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Obrien, Manager(616) 774-8200
- License
- 4301048187 (MI)
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
17 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
- 2009-03-27
- Last updated
- 2012-10-24
Frequently asked questions
- What is Mark S Obrien MD PLC's NPI number?
- Mark S Obrien MD PLC's National Provider Identifier (NPI) is 1609018233, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark S Obrien MD PLC?
- Mark S Obrien MD PLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark S Obrien MD PLC located?
- Mark S Obrien MD PLC's practice location on file with NPPES is 4070 Lake Dr Se, Grand Rapids, MI 49546-8294.
- What is Mark S Obrien MD PLC's phone number?
- The practice phone number listed in the NPPES registry for Mark S Obrien MD PLC is (616) 774-8200.
- Who is the authorized official for Mark S Obrien MD PLC?
- The authorized official listed on Mark S Obrien MD PLC's NPPES record is Mark Obrien, Manager. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark S Obrien MD PLC's NPI active?
- Yes — Mark S Obrien MD PLC's NPI (1609018233) is active in the NPPES registry as of the last update on 2012-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.