WASEEM CHAKER DIAB MD
NPI 1730753328
Internal Medicine in Saginaw, MI
About Waseem Chaker Diab Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WASEEM CHAKER DIAB MD (NPI 1730753328) is an individual internal medicine provider in Saginaw, Michigan, licensed in Michigan (4301512544) and active in the NPI registry since May 2021. He is enrolled in Medicare PECOS, is affiliated with Ascension St Mary's Hospital, and maintains a secondary practice location in Detroit.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Waseem Chaker Diab 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 Reassignment
Medicare enrollment records show Waseem Diab reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saginaw, MI 48602
- Reassigned Medicare billing, Michigan enrollment
- 194 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 2
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.
Ascension St Mary's Hospital
Acute Care Hospitals · Saginaw, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SAGINAW, MI 48601
SAGINAW, MI 48601
SAGINAW, MI 48601
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 Waseem Diab's NPI number?
The NPI number for Waseem Diab is 1730753328. It was assigned to this individual provider in the NPPES registry on May 18, 2021.
Where is Waseem Diab located?
Waseem Diab practices at 800 S Washington Ave, Saginaw, MI 48601. The listed phone number is (989) 746-7500.
What is Waseem Diab's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Waseem Diab enrolled in Medicare?
Yes. Waseem Diab 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 organization bills Medicare for Waseem Diab's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Waseem Diab reassigns Medicare benefits to Saginaw Cooperative Hospitals, Inc (Saginaw, MI). The 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 Waseem Diab's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Waseem Diab 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 list Waseem Diab 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 Waseem Diab affiliated with any hospitals?
According to CMS data, Waseem Diab is affiliated with Ascension St Mary's Hospital.
When was this NPI record last updated?
The NPPES record for Waseem Diab was last updated on August 23, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Waseem Chaker Diab, MD · NPI 1730753328
Internal Medicine physician in Saginaw, Michigan. Individual provider, active in the CMS NPPES registry since May 18, 2021.
## Identity
- **NPI:** 1730753328 (Entity type: Individual)
- **Enumerated:** May 18, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 4301512544 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 S WASHINGTON AVE, Saginaw, MI 48601-2551
- **Phone:** (989) 746-7500
## 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:** Saginaw Cooperative Hospitals, Inc (NPI 1184711038, Saginaw, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** August 23, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1730753328) · Data from the CMS NPPES public registry.