MAUREEN CHRISTIE RIES M.D.
NPI 1750544516
Obstetrics & Gynecology in La Jolla, CA
About Maureen Christie Ries M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MAUREEN CHRISTIE RIES M.D. (NPI 1750544516) is an individual obstetrics & gynecology provider in La Jolla, California, licensed in California (A127234) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of University Of California, San Diego School Of Medicine (2008).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 3
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
Maureen Christie Ries M.d. 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
4Medicare enrollment records show Maureen Ries reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 171 clinicians in this Medicare group
San Diego, CA 92127
- Reassigned Medicare billing, California enrollment
- 271 clinicians in this Medicare group
Costa Mesa, CA 92627
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: University Of California Irvine
- 255 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 149 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92037 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 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LA JOLLA, CA 92037
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 Maureen Ries's NPI number?
The NPI number for Maureen Ries is 1750544516. It was assigned to this individual provider in the NPPES registry on July 2, 2008. The provider is also known as Dr. Maureen Christie Loa M.D..
Where is Maureen Ries located?
Maureen Ries practices at 8910 Villa La Jolla Dr, La Jolla, CA 92037. The listed phone number is (800) 926-8273.
What is Maureen Ries's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Maureen Ries enrolled in Medicare?
Yes. Maureen Ries 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 Maureen Ries's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maureen Ries reassigns Medicare benefits to 4 organizations: Regents Of The University Of California (San Diego, CA), Uc San Diego Health Community Group (San Diego, CA), Uc Irvine Health Cancer Center, Newport Pacific Medical Center (Costa Mesa, CA) and Regents Of The University Of California (Orange, CA). 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 Maureen Ries'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 Maureen Ries was last updated on November 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Maureen Christie Ries, M.D. · NPI 1750544516
Obstetrics & Gynecology physician in La Jolla, California. Individual provider, active in the CMS NPPES registry since July 2, 2008.
## Identity
- **NPI:** 1750544516 (Entity type: Individual)
- **Enumerated:** July 2, 2008
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** A127234 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 8910 VILLA LA JOLLA DR, La Jolla, CA 92037-1701
- **Phone:** (800) 926-8273
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1174626618, San Diego, CA); Uc San Diego Health Community Group (NPI 1659864247, San Diego, CA); Uc Irvine Health Cancer Center, Newport Pacific Medical Center (NPI 1558783696, Costa Mesa, CA); Regents Of The University Of California (NPI 1356304034, Orange, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 2008
## Record status
- **NPPES last updated:** November 13, 2025
- **Other identifiers:** Medicaid 0066528 (OH); Medicaid 3810023292 (WV)
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Source: [NPI Profile](https://npiprofile.com/npi/1750544516) · Data from the CMS NPPES public registry.