DR. CHASE ALEXANDER GRAY M.D.
NPI 1861855207
Emergency Medicine in Saint Louis, MO
About Dr. Chase Alexander Gray M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHASE ALEXANDER GRAY M.D. (NPI 1861855207) is an individual emergency medicine provider in Saint Louis, Missouri, licensed in Missouri (2013022423) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Chase Alexander Gray M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Chase Gray 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
- 186 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 241 clinicians in this Medicare group
Festus, MO 63028
- Reassigned Medicare billing, Missouri enrollment
- 118 clinicians in this Medicare group
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 178 clinicians in this Medicare group
Winfield, MO 63389
- Reassigned Medicare billing, Missouri enrollment
- 229 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 3
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.
Physician 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 Chase Gray's NPI number?
The NPI number for Chase Gray is 1861855207. It was assigned to this individual provider in the NPPES registry on April 2, 2016.
Where is Chase Gray located?
Chase Gray practices at 10010 Kennerly Rd, Saint Louis, MO 63128. The listed phone number is (314) 550-1911.
What is Chase Gray's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Chase Gray enrolled in Medicare?
Yes. Chase Gray is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Chase Gray's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Chase Gray reassigns Medicare benefits to 5 organizations: Mercy Hospital South (Saint Louis, MO), Mercy Hospitals East Communities (Saint Louis, MO), Mercy Hospital Jefferson (Festus, MO), Mercy Hospitals East Communities (Washington, MO) and Mercy Hospital Lincoln (Winfield, 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 Chase Gray's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Chase Gray was last updated on November 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.
# Dr. Chase Alexander Gray, M.D. · NPI 1861855207
Emergency Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since April 2, 2016.
## Identity
- **NPI:** 1861855207 (Entity type: Individual)
- **Enumerated:** April 2, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 2013022423 (Missouri)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 10010 KENNERLY RD, Saint Louis, MO 63128-2106
- **Phone:** (314) 550-1911
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Mercy Hospital South (NPI 1568481984, Saint Louis, MO); Mercy Hospitals East Communities (NPI 1427098169, Saint Louis, MO); Mercy Hospital Jefferson (NPI 1508859661, Festus, MO); Mercy Hospitals East Communities (NPI 1104912997, Washington, MO); Mercy Hospital Lincoln (NPI 1386040178, Winfield, MO) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 18, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1861855207) · Data from the CMS NPPES public registry.