NEIL BACKER MD
NPI 1962933911
Internal Medicine in Saint Louis, MO
About Neil Backer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NEIL BACKER MD (NPI 1962933911) is an individual internal medicine provider in Saint Louis, Missouri, licensed in Missouri (2021014489) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital South, and is a graduate of Saint Louis University School Of Medicine (2017).
NPPES Registry Identity
Specialties & Licenses 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
Neil Backer 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
5Medicare enrollment records show Neil Backer reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: St Anthonys Physician Organization Hospitalist Services Lc
- 340 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 326 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 435 clinicians in this Medicare group
Festus, MO 63028
- Reassigned Medicare billing, Missouri enrollment
- 299 clinicians in this Medicare group
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 261 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 6
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.
Mercy Hospital South
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63128 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.
SAINT LOUIS, MO 63128
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 Neil Backer's NPI number?
The NPI number for Neil Backer is 1962933911. It was assigned to this individual provider in the NPPES registry on March 22, 2017.
Where is Neil Backer located?
Neil Backer practices at 10010 Kennerly Rd, Saint Louis, MO 63128. The listed phone number is (314) 525-1328.
What is Neil Backer's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Neil Backer enrolled in Medicare?
Yes. Neil Backer 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 Neil Backer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Neil Backer reassigns Medicare benefits to 5 organizations: St Anthonys Physician Organization Hospitalist Services, L.C. (Saint Louis, MO), Mercy Clinic Adult Hospitalists - St. Louis, LLC (Saint Louis, MO), Mercy Hospitals East Communities (Saint Louis, MO), Mercy Clinic Adult Hospitalists- Jefferson, LLC (Festus, MO) and Mercy Clinic Adult Hospitalists - Washington, LLC (Washington, MO). 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 Neil Backer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Neil Backer accept?
Health plans from Anthem Blue Cross and Blue Shield list Neil Backer 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 Neil Backer affiliated with any hospitals?
According to CMS data, Neil Backer is affiliated with Mercy Hospital South.
When was this NPI record last updated?
The NPPES record for Neil Backer was last updated on August 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Neil Backer, MD · NPI 1962933911
Internal Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since March 22, 2017.
## Identity
- **NPI:** 1962933911 (Entity type: Individual)
- **Enumerated:** March 22, 2017
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 2021014489 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 10010 KENNERLY RD, Saint Louis, MO 63128-2106
- **Phone:** (314) 525-1328
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): St Anthonys Physician Organization Hospitalist Services, L.C. (NPI 1407216336, Saint Louis, MO); Mercy Clinic Adult Hospitalists - St. Louis, LLC (NPI 1841235108, Saint Louis, MO); Mercy Hospitals East Communities (NPI 1851431738, Saint Louis, MO); Mercy Clinic Adult Hospitalists- Jefferson, LLC (NPI 1083052492, Festus, MO); Mercy Clinic Adult Hospitalists - Washington, LLC (NPI 1891943429, Washington, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** August 12, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1962933911) · Data from the CMS NPPES public registry.