ANN MARIE GEIMER N.P.
NPI 1558596478
Nurse Practitioner in Decatur, IN
About Ann Marie Geimer N.p. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANN MARIE GEIMER N.P. (NPI 1558596478) is an individual nurse practitioner in Decatur, Indiana, licensed in Indiana (71002922A) and active in the NPI registry since May 2009. She is enrolled in Medicare PECOS, is affiliated with Adams Memorial Hospital, and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses
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
Ann Marie Geimer N.p. 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 Ann Geimer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Decatur, IN 46733
- Reassigned Medicare billing, Indiana enrollment
- 96 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 4
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.
Adams Memorial Hospital
Critical Access Hospitals · Decatur, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46733 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.
Referred Medical Equipment & Supplies CMS DME claims 3
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.
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 Ann Geimer's NPI number?
The NPI number for Ann Geimer is 1558596478. It was assigned to this individual provider in the NPPES registry on May 20, 2009.
Where is Ann Geimer located?
Ann Geimer practices at 1100 Mercer Ave, Decatur, IN 46733. The listed phone number is (260) 724-2145.
What is Ann Geimer's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Ann Geimer enrolled in Medicare?
Yes. Ann Geimer 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 Ann Geimer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ann Geimer reassigns Medicare benefits to Adams County Memorial Hospital (Decatur, IN). 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 Ann Geimer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ann Geimer accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource list Ann Geimer 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 Ann Geimer affiliated with any hospitals?
According to CMS data, Ann Geimer is affiliated with Adams Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Ann Geimer was last updated on October 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Ann Marie Geimer, N.P. · NPI 1558596478
Nurse Practitioner physician in Decatur, Indiana. Individual provider, active in the CMS NPPES registry since May 20, 2009.
## Identity
- **NPI:** 1558596478 (Entity type: Individual)
- **Enumerated:** May 20, 2009
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 71002922A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1100 MERCER AVE, Decatur, IN 46733-2303
- **Phone:** (260) 724-2145 · **Fax:** (260) 728-3867
## 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:** Adams County Memorial Hospital (NPI 1689696148, Decatur, IN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** October 15, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1558596478) · Data from the CMS NPPES public registry.