MARY L MAYER MD
NPI 1770588808
Internal Medicine - Medical Oncology in Indianapolis, IN
About Mary L Mayer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY L MAYER MD (NPI 1770588808) is an individual medical oncology provider in Indianapolis, Indiana, licensed in Indiana (01040769A) and active in the NPI registry since June 2005. She is enrolled in Medicare PECOS, is affiliated with Franciscan Health Mooresville, and is a graduate of Indiana University School Of Medicine (1987).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 7
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
Mary L Mayer 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 Mary Mayer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Indianapolis, IN 46250
- Reassigned Medicare billing, Indiana enrollment
- 266 clinicians in this Medicare group
Indianapolis, IN 46256
- Reassigned Medicare billing, Indiana enrollment
- 2,087 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 7
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Franciscan Health Mooresville
Acute Care Hospitals · Mooresville, INCommunity Hospital East
Acute Care Hospitals · Indianapolis, INColumbus Regional Hospital
Acute Care Hospitals · Columbus, INCommunity Hospital South, Inc.
Acute Care Hospitals · Indianapolis, INFranciscan Health Indianapolis
Acute Care Hospitals · Indianapolis, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46250 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 12
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.
INDIANAPOLIS, IN 46250
INDIANAPOLIS, IN 46250
INDIANAPOLIS, IN 46250
INDIANAPOLIS, IN 46250
INDIANAPOLIS, IN 46250
INDIANAPOLIS, IN 46250
INDIANAPOLIS, IN 46250
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 Mary Mayer's NPI number?
The NPI number for Mary Mayer is 1770588808. It was assigned to this individual provider in the NPPES registry on June 15, 2005.
Where is Mary Mayer located?
Mary Mayer practices at 7979 N Shadeland Ave Ste 200, Indianapolis, IN 46250. The listed phone number is (317) 621-4300.
What is Mary Mayer's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Mary Mayer enrolled in Medicare?
Yes. Mary Mayer 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 Mary Mayer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Mayer reassigns Medicare benefits to 2 organizations: Community Physician Network Specialty Care LLC (Indianapolis, IN) and Community Physicians Of Indiana Inc (Indianapolis, IN). 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 Mary Mayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Mayer accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource and 2 other insurers list Mary Mayer 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 Mary Mayer affiliated with any hospitals?
According to CMS data, Mary Mayer is affiliated with Franciscan Health Mooresville, Community Hospital East, Columbus Regional Hospital, Community Hospital South, Inc. and Franciscan Health Indianapolis.
When was this NPI record last updated?
The NPPES record for Mary Mayer was last updated on September 6, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Mary L Mayer, MD · NPI 1770588808
Medical Oncology physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since June 15, 2005.
## Identity
- **NPI:** 1770588808 (Entity type: Individual)
- **Enumerated:** June 15, 2005
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** 01040769A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 7979 N SHADELAND AVE, STE 200, Indianapolis, IN 46250-2042
- **Phone:** (317) 621-4300 · **Fax:** (317) 621-4301
## 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): Community Physician Network Specialty Care LLC (NPI 1588535496, Indianapolis, IN); Community Physicians Of Indiana Inc (NPI 1619105244, Indianapolis, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Indiana University School Of Medicine, class of 1987
## Record status
- **NPPES last updated:** September 6, 2023
- **Other identifiers:** Other 2048872 (IN); Other 000000902313 (IN); Other P01751205 (IN); and 4 more
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Source: [NPI Profile](https://npiprofile.com/npi/1770588808) · Data from the CMS NPPES public registry.