CHRIS C NAUM MD
NPI 1215938451
Internal Medicine - Critical Care Medicine in Indianapolis, IN
About Chris C Naum Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHRIS C NAUM MD (NPI 1215938451) is an individual critical care medicine provider in Indianapolis, Indiana, licensed in Indiana (01034864A) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Indiana University Health Bloomington Hospital, and maintains a secondary practice location in Indianapolis.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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
Chris C Naum 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 Chris Naum 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
- 318 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 8
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Indiana University Health Bloomington Hospital
Acute Care Hospitals · Bloomington, INIndiana University Health
Acute Care Hospitals · Indianapolis, INIu Health West Hospital
Acute Care Hospitals · Avon, INIndiana University Health North Hospital
Acute Care Hospitals · Carmel, 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.
Referred Medical Equipment & Supplies CMS DME claims 6
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 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 Chris Naum's NPI number?
The NPI number for Chris Naum is 1215938451. It was assigned to this individual provider in the NPPES registry on August 10, 2005.
Where is Chris Naum located?
Chris Naum practices at 1801 N Senate Blvd Suite 230, Indianapolis, IN 46202. The listed phone number is (317) 962-5820.
What is Chris Naum's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Chris Naum enrolled in Medicare?
Yes. Chris Naum 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 Chris Naum's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Chris Naum reassigns Medicare benefits to 2 organizations: Indiana Clinic Critical Care LLC (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 Chris Naum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Chris Naum 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 Chris Naum 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 Chris Naum affiliated with any hospitals?
According to CMS data, Chris Naum is affiliated with Indiana University Health Bloomington Hospital, Indiana University Health, Iu Health West Hospital and Indiana University Health North Hospital.
When was this NPI record last updated?
The NPPES record for Chris Naum was last updated on March 5, 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.
# Chris C Naum, MD · NPI 1215938451
Critical Care Medicine physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since August 10, 2005.
## Identity
- **NPI:** 1215938451 (Entity type: Individual)
- **Enumerated:** August 10, 2005
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 01034864A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1801 N SENATE BLVD, SUITE 230, Indianapolis, IN 46202-1252
- **Phone:** (317) 962-5820 · **Fax:** (317) 962-3916
## 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): Indiana Clinic Critical Care LLC (NPI 1417285230, 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 1983
## Record status
- **NPPES last updated:** March 5, 2025
- **Other identifiers:** Other 000000668498 (IN); Medicaid 100385820 (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1215938451) · Data from the CMS NPPES public registry.