BENJAMIN JOHN DIACZOK I MD
NPI 1760480834
Internal Medicine in Pontiac, MI
About Benjamin John Diaczok I Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BENJAMIN JOHN DIACZOK I MD (NPI 1760480834) is an individual internal medicine provider in Pontiac, Michigan, licensed in Michigan (4301050499) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, is affiliated with Trinity Health Oakland Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 2
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
Benjamin John Diaczok I 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
3Medicare enrollment records show Benjamin Diaczok reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pontiac, MI 48341
- Reassigned Medicare billing, Michigan enrollment
- 57 clinicians in this Medicare group
Pontiac, MI 48341
- Reassigned Medicare billing, Michigan enrollment
- 47 clinicians in this Medicare group
Farmington Hills, MI 48334
- Reassigned Medicare billing, Michigan enrollment
- 1,480 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 3
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.
Trinity Health Oakland Hospital
Acute Care Hospitals · Pontiac, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48341 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 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Benjamin Diaczok's NPI number?
The NPI number for Benjamin Diaczok is 1760480834. It was assigned to this individual provider in the NPPES registry on July 12, 2005.
Where is Benjamin Diaczok located?
Benjamin Diaczok practices at 44428 Woodward Ave Ste 102, Pontiac, MI 48341. The listed phone number is (248) 858-3126.
What is Benjamin Diaczok's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Benjamin Diaczok enrolled in Medicare?
Yes. Benjamin Diaczok 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 Benjamin Diaczok's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Benjamin Diaczok reassigns Medicare benefits to 3 organizations: Iha Ooma Primary LLC (Pontiac, MI), The Wellness Plan Medical Centers (Pontiac, MI) and Iha Health Services Corporation (Farmington Hills, 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 Benjamin Diaczok's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Benjamin Diaczok 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 Benjamin Diaczok 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 Benjamin Diaczok affiliated with any hospitals?
According to CMS data, Benjamin Diaczok is affiliated with Trinity Health Oakland Hospital.
When was this NPI record last updated?
The NPPES record for Benjamin Diaczok was last updated on April 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.
# Benjamin John Diaczok I, MD · NPI 1760480834
Internal Medicine physician in Pontiac, Michigan. Individual provider, active in the CMS NPPES registry since July 12, 2005.
## Identity
- **NPI:** 1760480834 (Entity type: Individual)
- **Enumerated:** July 12, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 4301050499 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 44428 WOODWARD AVE STE 102, Pontiac, MI 48341-5009
- **Phone:** (248) 858-3126 · **Fax:** (248) 858-6499
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Iha Ooma Primary LLC (NPI 1841907821, Pontiac, MI); The Wellness Plan Medical Centers (NPI 1447675434, Pontiac, MI); Iha Health Services Corporation (NPI 1750138566, Farmington Hills, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 1985
## Record status
- **NPPES last updated:** April 3, 2025
- **Other identifiers:** Medicaid 348812110 (MI); Other 4301050499 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1760480834) · Data from the CMS NPPES public registry.