DR. ELLYN JOYCE GRAY MD
NPI 1881187367
Anesthesiology in Grand Rapids, MI
About Dr. Ellyn Joyce Gray Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ELLYN JOYCE GRAY MD (NPI 1881187367) is an individual anesthesiology provider in Grand Rapids, Michigan, licensed in Michigan (4301509128) and active in the NPI registry since June 2018. She is enrolled in Medicare PECOS, is affiliated with University Of Michigan Health - West, and maintains a secondary practice location in Grand Rapids.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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. Ellyn Joyce Gray 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 Reassignment
Medicare enrollment records show Ellyn Gray reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Rapid City, SD 57701
- Reassigned Medicare billing, South Dakota enrollment
- 20 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Michigan Health - West
Acute Care Hospitals · Wyoming, MIMonument Health Rapid City Hospital
Acute Care Hospitals · Rapid City, SDSame Day Surgery Center LLC
Acute Care Hospitals · Rapid City, SDOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND RAPIDS, MI 49503
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 Ellyn Gray's NPI number?
The NPI number for Ellyn Gray is 1881187367. It was assigned to this individual provider in the NPPES registry on June 11, 2018.
Where is Ellyn Gray located?
Ellyn Gray practices at 100 Michigan St NE, Grand Rapids, MI 49503. The listed phone number is (616) 364-4200.
What is Ellyn Gray's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Ellyn Gray enrolled in Medicare?
Yes. Ellyn Gray 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 organization bills Medicare for Ellyn Gray's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ellyn Gray reassigns Medicare benefits to West River Anesthesiology Consultants PC (Rapid City, SD). The 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 Ellyn Gray's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ellyn Gray accept?
Health plans from Wellmark of South Dakota, Inc. list Ellyn Gray 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 Ellyn Gray affiliated with any hospitals?
According to CMS data, Ellyn Gray is affiliated with University Of Michigan Health - West, Monument Health Rapid City Hospital and Same Day Surgery Center LLC.
When was this NPI record last updated?
The NPPES record for Ellyn Gray was last updated on May 2, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Ellyn Joyce Gray, MD · NPI 1881187367
Anesthesiology physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since June 11, 2018.
## Identity
- **NPI:** 1881187367 (Entity type: Individual)
- **Enumerated:** June 11, 2018
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 4301509128 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 MICHIGAN ST NE, Grand Rapids, MI 49503-2560
- **Phone:** (616) 364-4200
## 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:** West River Anesthesiology Consultants PC (NPI 1396775284, Rapid City, SD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2018
## Record status
- **NPPES last updated:** May 2, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1881187367) · Data from the CMS NPPES public registry.