DR. JOHN WILLIS MARSHALL MD
NPI 1285676999
Emergency Medicine in Chattanooga, TN
About Dr. John Willis Marshall Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN WILLIS MARSHALL MD (NPI 1285676999) is an individual emergency medicine provider in Chattanooga, Tennessee, licensed in Tennessee (30691) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Chi Memorial Hospital- Georgia, and is a graduate of University Of Kentucky College Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses 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
Dr. John Willis Marshall 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
8Medicare enrollment records show John Marshall reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chattanooga, TN 37404
- Reassigned Medicare billing, Georgia and Tennessee enrollments
- 61 clinicians in this Medicare group
Dayton, TN 37321
- Reassigned Medicare billing, Tennessee enrollment
- 41 clinicians in this Medicare group
Sweetwater, TN 37874
- Reassigned Medicare billing, Tennessee enrollment
- Medicare enrollment name: Sweetwater Hospital Association
- 21 clinicians in this Medicare group
Brentwood, TN 37027
- Reassigned Medicare billing, Tennessee enrollment
- 208 clinicians in this Medicare group
Nashville, TN 37203
- Reassigned Medicare billing, Tennessee enrollment
- 414 clinicians in this Medicare group
Newport, TN 37821
- Reassigned Medicare billing, Georgia and Tennessee enrollments
- 330 clinicians in this Medicare group
Hardinsburg, KY 40143
- Reassigned Medicare billing, Tennessee enrollment
- 70 clinicians in this Medicare group
Maysville, KY 41056
- Reassigned Medicare billing, Tennessee enrollment
- 1,071 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 2
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.
Chi Memorial Hospital- Georgia
Acute Care Hospitals · Fort Oglethorpe, GASweetwater Hospital Association
Acute Care Hospitals · Sweetwater, TNMemorial Healthcare System, Inc
Acute Care Hospitals · Chattanooga, TNParkridge Medical Center
Acute Care Hospitals · Chattanooga, TNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37404 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.
CHATTANOOGA, TN 37404
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 John Marshall's NPI number?
The NPI number for John Marshall is 1285676999. It was assigned to this individual provider in the NPPES registry on June 10, 2006.
Where is John Marshall located?
John Marshall practices at 2333 Mccallie Ave, Chattanooga, TN 37404. The listed phone number is (423) 493-1493.
What is John Marshall's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Marshall enrolled in Medicare?
Yes. John Marshall 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 John Marshall's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Marshall reassigns Medicare benefits to 8 organizations: Chattanooga Emergency Medicine PLLC (Chattanooga, TN), Rhea Medical Center (Dayton, TN), Sweetwater Hospital ER Physician Group (Sweetwater, TN), Carr PLLC (Brentwood, TN), Emergency Medicine Services Of Tn, PC (Nashville, TN) and 3 more organizations, listed in the Medicare section above. 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 John Marshall's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Marshall accept?
Health plans from Alliant Health Plans, Inc., Cigna Healthcare and Oscar Insurance Company list John Marshall 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 John Marshall affiliated with any hospitals?
According to CMS data, John Marshall is affiliated with Chi Memorial Hospital- Georgia, Sweetwater Hospital Association, Memorial Healthcare System, Inc and Parkridge Medical Center.
When was this NPI record last updated?
The NPPES record for John Marshall was last updated on September 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 44 days 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.
# Dr. John Willis Marshall, MD · NPI 1285676999
Emergency Medicine physician in Chattanooga, Tennessee. Individual provider, active in the CMS NPPES registry since June 10, 2006.
## Identity
- **NPI:** 1285676999 (Entity type: Individual)
- **Enumerated:** June 10, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 30691 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 2333 MCCALLIE AVE, Chattanooga, TN 37404-3258
- **Phone:** (423) 493-1493 · **Fax:** (423) 698-6061
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Chattanooga Emergency Medicine PLLC (NPI 1174739908, Chattanooga, TN); Rhea Medical Center (NPI 1811987084, Dayton, TN); Sweetwater Hospital ER Physician Group (NPI 1083613905, Sweetwater, TN); Carr PLLC (NPI 1548677610, Brentwood, TN); Emergency Medicine Services Of Tn, PC (NPI 1720785884, Nashville, TN); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Kentucky College Of Medicine, class of 1993
## Record status
- **NPPES last updated:** September 7, 2026
- **Other identifiers:** Medicaid 000818364K (GA); Medicaid 3836151 (TN)
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Source: [NPI Profile](https://npiprofile.com/npi/1285676999) · Data from the CMS NPPES public registry.