ROBERT J FONTANA MD
NPI 1700968237
Internal Medicine - Gastroenterology in Ann Arbor, MI
About Robert J Fontana Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT J FONTANA MD (NPI 1700968237) is an individual gastroenterology provider in Ann Arbor, Michigan, licensed in Michigan (4301059767) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with University Of Michigan Health System, and is a graduate of University Of Michigan Medical School (1988).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Robert J Fontana Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Robert Fontana reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ann Arbor, MI 48109
- Reassigned Medicare billing, Michigan enrollment
- 2,377 clinicians in this Medicare group
Rockford, MI 49341
- Reassigned Medicare billing, Michigan enrollment
- 737 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Michigan Health System
Acute Care Hospitals · Ann Arbor, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48109 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 7
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Robert Fontana's NPI number?
The NPI number for Robert Fontana is 1700968237. It was assigned to this individual provider in the NPPES registry on October 20, 2006.
Where is Robert Fontana located?
Robert Fontana practices at 1500 East Medical Center Dr 3rd Floor Taubman Ctr Recp D, Ann Arbor, MI 48109. The listed phone number is (734) 647-5944.
What is Robert Fontana's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Robert Fontana enrolled in Medicare?
Yes. Robert Fontana is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Robert Fontana's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Fontana reassigns Medicare benefits to 2 organizations: Regents Of The University Of Michigan (Ann Arbor, MI) and Advantage Health Saint Mary's Medical Group (Rockford, MI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Fontana's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Robert Fontana accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Robert Fontana as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Robert Fontana affiliated with any hospitals?
According to CMS data, Robert Fontana is affiliated with University Of Michigan Health System.
When was this NPI record last updated?
The NPPES record for Robert Fontana was last updated on March 9, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Robert J Fontana, MD · NPI 1700968237
Gastroenterology physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since October 20, 2006.
## Identity
- **NPI:** 1700968237 (Entity type: Individual)
- **Enumerated:** October 20, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 4301059767 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 EAST MEDICAL CENTER DR, 3RD FLOOR TAUBMAN CTR RECP D, Ann Arbor, MI 48109-5362
- **Phone:** (734) 647-5944
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of Michigan (NPI 1003848144, Ann Arbor, MI); Advantage Health Saint Mary's Medical Group (NPI 1083014914, Rockford, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 1988
## Record status
- **NPPES last updated:** March 9, 2012
- **Other identifiers:** Medicare ID-Type Unspecified 0H17629420 (MI); Medicare UPIN F13941 (MI); Medicaid 3122615 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1700968237) · Data from the CMS NPPES public registry.