DR. DIANA OKUNIEWSKI D.O.
NPI 1184831547
Obstetrics & Gynecology in Marshall, MI
About Dr. Diana Okuniewski D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIANA OKUNIEWSKI D.O. (NPI 1184831547) is an individual obstetrics & gynecology provider in Marshall, Michigan, licensed in Michigan (L1125376) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, maintains a secondary practice location in Grand Haven, and is a graduate of Michigan State University College Of Osteopathic Medicine (2007).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Diana Okuniewski D.o. 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
10Medicare enrollment records show Diana Okuniewski reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Marshall, MI 49068
- Reassigned Medicare billing, Michigan enrollment
- 168 clinicians in this Medicare group
Marshall, MI 49068
- Reassigned Medicare billing, Michigan enrollment
- 28 clinicians in this Medicare group
Jackson, MI 49201
- Reassigned Medicare billing, Michigan enrollment
- 37 clinicians in this Medicare group
Kalamazoo, MI 49048
- Reassigned Medicare billing, Michigan enrollment
- Medicare enrollment name: Ascension Medical Group Promed
- 465 clinicians in this Medicare group
Fowler, MI 48835
- Reassigned Medicare billing, Michigan enrollment
- 215 clinicians in this Medicare group
Grant, MI 49327
- Reassigned Medicare billing, Michigan enrollment
- 180 clinicians in this Medicare group
Big Rapids, MI 49307
- Reassigned Medicare billing, Michigan enrollment
- 151 clinicians in this Medicare group
Ludington, MI 49431
- Reassigned Medicare billing, Michigan enrollment
- 168 clinicians in this Medicare group
Canton, OH 44708
- Reassigned Medicare billing, Ohio enrollment
- 76 clinicians in this Medicare group
Providence, RI 02905
- Reassigned Medicare billing, Rhode Island enrollment
- 1,372 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49068 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Other Providers at the Same Location NPPES 4
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 Diana Okuniewski's NPI number?
The NPI number for Diana Okuniewski is 1184831547. It was assigned to this individual provider in the NPPES registry on May 16, 2007.
Where is Diana Okuniewski located?
Diana Okuniewski practices at 215 E Mansion St Ste 3D, Marshall, MI 49068. The listed phone number is (269) 558-0702.
What is Diana Okuniewski's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Diana Okuniewski enrolled in Medicare?
Yes. Diana Okuniewski 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 Diana Okuniewski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diana Okuniewski reassigns Medicare benefits to 10 organizations: Ella E M Brown Charitable Circle (Marshall, MI), Obhg Michigan - Direct PC (Marshall, MI), Obhg Michigan, PC (Jackson, MI), Promed Healthcare (Kalamazoo, MI), Sparrow Carson Hospital (Fowler, MI) and 5 more organizations, listed in the Medicare section above. 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 Diana Okuniewski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Diana Okuniewski 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 Diana Okuniewski 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.
When was this NPI record last updated?
The NPPES record for Diana Okuniewski was last updated on May 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Dr. Diana Okuniewski, D.O. · NPI 1184831547
Obstetrics & Gynecology physician in Marshall, Michigan. Individual provider, active in the CMS NPPES registry since May 16, 2007.
## Identity
- **NPI:** 1184831547 (Entity type: Individual)
- **Enumerated:** May 16, 2007
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** L1125376 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 215 E MANSION ST STE 3D, Marshall, MI 49068-1167
- **Phone:** (269) 558-0702
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Ella E M Brown Charitable Circle (NPI 1043660467, Marshall, MI); Obhg Michigan - Direct PC (NPI 1164116570, Marshall, MI); Obhg Michigan, PC (NPI 1790120863, Jackson, MI); Promed Healthcare (NPI 1568592038, Kalamazoo, MI); Sparrow Carson Hospital (NPI 1619124328, Fowler, MI); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2007
## Record status
- **NPPES last updated:** May 23, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1184831547) · Data from the CMS NPPES public registry.