SAMANTHA ANN ARMSTRONG MD
NPI 1689053761
Internal Medicine - Hematology & Oncology in Indianapolis, IN
About Samantha Ann Armstrong Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SAMANTHA ANN ARMSTRONG MD (NPI 1689053761) is an individual hematology & oncology provider in Indianapolis, Indiana, licensed in Indiana (01085460A) and active in the NPI registry since May 2015. She is enrolled in Medicare PECOS, is affiliated with Eskenazi Health, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 5
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
Samantha Ann Armstrong 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 Samantha Armstrong reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 358 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 5,212 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 5
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.
Eskenazi Health
Acute Care Hospitals · Indianapolis, INIndiana University Health Bloomington Hospital
Acute Care Hospitals · Bloomington, INIndiana University Health
Acute Care Hospitals · Indianapolis, INIndiana University Health Arnett Hospital
Acute Care Hospitals · Lafayette, INIndiana University Health White Memorial Hospital
Critical Access Hospitals · Monticello, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46202 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.
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
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 Samantha Armstrong's NPI number?
The NPI number for Samantha Armstrong is 1689053761. It was assigned to this individual provider in the NPPES registry on May 22, 2015.
Where is Samantha Armstrong located?
Samantha Armstrong practices at 1120 W Michigan St Room 626, Indianapolis, IN 46202. The listed phone number is (317) 278-2686.
What is Samantha Armstrong's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Samantha Armstrong enrolled in Medicare?
Yes. Samantha Armstrong 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 Samantha Armstrong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Samantha Armstrong reassigns Medicare benefits to 2 organizations: University Medical Diagnostic Associates, Inc. (Indianapolis, IN) and Iu Health Medical Group, LLC (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 Samantha Armstrong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Samantha Armstrong 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 Samantha Armstrong 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 Samantha Armstrong affiliated with any hospitals?
According to CMS data, Samantha Armstrong is affiliated with Eskenazi Health, Indiana University Health Bloomington Hospital, Indiana University Health, Indiana University Health Arnett Hospital and Indiana University Health White Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Samantha Armstrong was last updated on February 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# Samantha Ann Armstrong, MD · NPI 1689053761
Hematology & Oncology physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since May 22, 2015.
## Identity
- **NPI:** 1689053761 (Entity type: Individual)
- **Enumerated:** May 22, 2015
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 01085460A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1120 W MICHIGAN ST, ROOM 626, Indianapolis, IN 46202-5209
- **Phone:** (317) 278-2686
## 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): University Medical Diagnostic Associates, Inc. (NPI 1861441537, Indianapolis, IN); Iu Health Medical Group, LLC (NPI 1326893777, Indianapolis, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Indiana University School Of Medicine, class of 2015
## Record status
- **NPPES last updated:** February 26, 2025
- **Other identifiers:** Other 000001558404 (IN); Medicaid 300052067 (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1689053761) · Data from the CMS NPPES public registry.