DR. MICHAEL GRAY MD
NPI 1003045915
Hospitalist in Newport Beach, CA
About Dr. Michael Gray Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL GRAY MD (NPI 1003045915) is an individual hospitalist provider in Newport Beach, California, licensed in California (A112324) and active in the NPI registry since July 2009. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (2008).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
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. Michael 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 Michael Gray reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newport Beach, CA 92663
- Reassigned Medicare billing, California enrollment
- 105 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
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 92663 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
NEWPORT BEACH, CA 92663
NEWPORT BEACH, CA 92663
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 Michael Gray's NPI number?
The NPI number for Michael Gray is 1003045915. It was assigned to this individual provider in the NPPES registry on July 13, 2009.
Where is Michael Gray located?
Michael Gray practices at 1 Hoag Dr, Newport Beach, CA 92663. The listed phone number is (949) 610-7245.
What is Michael Gray's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Michael Gray enrolled in Medicare?
Yes. Michael 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 Michael Gray's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Gray reassigns Medicare benefits to Pacific Hospitalist Associates A Medical Corporation (Newport Beach, CA). 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 Michael 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 Michael Gray was last updated on May 11, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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. Michael Gray, MD · NPI 1003045915
Hospitalist physician in Newport Beach, California. Individual provider, active in the CMS NPPES registry since July 13, 2009.
## Identity
- **NPI:** 1003045915 (Entity type: Individual)
- **Enumerated:** July 13, 2009
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A112324 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 HOAG DR, Newport Beach, CA 92663-4162
- **Phone:** (949) 610-7245 · **Fax:** (657) 241-7720
## 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:** Pacific Hospitalist Associates A Medical Corporation (NPI 1992750137, Newport Beach, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 2008
## Record status
- **NPPES last updated:** May 11, 2017
- **Other identifiers:** Medicare PIN FH837Z (CA); Other P01503954 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1003045915) · Data from the CMS NPPES public registry.