Mark Fedder, MD, PC
NPI 1184806101 · Gastroenterology Physician · Maryville, IL
Mark Fedder, MD, PC is a Gastroenterology Physician organization in Maryville, IL (NPI 1184806101).
Provider details
- NPI number
- 1184806101
- Entity type
- Organization
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Fedder, Owner/President(618) 288-0346
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
18 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
- 2007-11-30
- Last updated
- 2007-11-30
Frequently asked questions
- What is Mark Fedder, MD, PC's NPI number?
- Mark Fedder, MD, PC's National Provider Identifier (NPI) is 1184806101, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark Fedder, MD, PC?
- Mark Fedder, MD, PC is classified in the NPPES registry as Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Fedder, MD, PC located?
- Mark Fedder, MD, PC's practice location on file with NPPES is 6810 State Route 162, Maryville, IL 62062-8501.
- What is Mark Fedder, MD, PC's phone number?
- The practice phone number listed in the NPPES registry for Mark Fedder, MD, PC is (618) 288-0346.
- Who is the authorized official for Mark Fedder, MD, PC?
- The authorized official listed on Mark Fedder, MD, PC's NPPES record is Mark Fedder, Owner/President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark Fedder, MD, PC's NPI active?
- Yes — Mark Fedder, MD, PC's NPI (1184806101) is active in the NPPES registry as of the last update on 2007-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.