Mary Marshall, MD, PC
NPI 1558451724 · Family Medicine Physician · Grand Blanc, MI
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Marshall, MD, PC is a Family Medicine Physician organization in Grand Blanc, MI (NPI 1558451724).
Provider details
- NPI number
- 1558451724
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mary Marshall, Owner/President(810) 695-2210
- License
- MM070680 (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
19 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
- 2006-10-16
- Last updated
- 2011-08-10
Frequently asked questions
- What is Mary Marshall, MD, PC's NPI number?
- Mary Marshall, MD, PC's National Provider Identifier (NPI) is 1558451724, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mary Marshall, MD, PC?
- Mary Marshall, MD, PC is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Marshall, MD, PC located?
- Mary Marshall, MD, PC's practice location on file with NPPES is 8195 S Saginaw St, Grand Blanc, MI 48439-1885.
- What is Mary Marshall, MD, PC's phone number?
- The practice phone number listed in the NPPES registry for Mary Marshall, MD, PC is (810) 695-2210.
- Does Mary Marshall, MD, PC accept Medicare?
- Mary Marshall, MD, PC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mary Marshall, MD, PC?
- The authorized official listed on Mary Marshall, MD, PC's NPPES record is Mary Marshall, Owner/President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mary Marshall, MD, PC's NPI active?
- Yes — Mary Marshall, MD, PC's NPI (1558451724) is active in the NPPES registry as of the last update on 2011-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.