DR. MARIA REGINA F OAKES MD
NPI 1275588410
Emergency Medicine in Louisville, CO
About Dr. Maria Regina F Oakes Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARIA REGINA F OAKES MD (NPI 1275588410) is an individual emergency medicine provider in Louisville, Colorado, licensed in Texas (W1074) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Island Hospital, and is a graduate of New York Medical College (2003).
NPPES Registry Identity
Specialties & Licenses
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. Maria Regina F Oakes 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
9Medicare enrollment records show Maria Regina Oakes reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Louisville, CO 80027
- Reassigned Medicare billing, Colorado enrollment
- 468 clinicians in this Medicare group
Lafayette, CO 80026
- Reassigned Medicare billing, Colorado enrollment
- Medicare enrollment name: Boulder Emergency Physicians P.C.
- 23 clinicians in this Medicare group
Westminster, CO 80021
- Reassigned Medicare billing, Colorado enrollment
- 130 clinicians in this Medicare group
Arvada, CO 80007
- Reassigned Medicare billing, Colorado enrollment
- 352 clinicians in this Medicare group
Golden, CO 80401
- Reassigned Medicare billing, Colorado enrollment
- 285 clinicians in this Medicare group
Brighton, CO 80601
- Reassigned Medicare billing, Colorado enrollment
- 31 clinicians in this Medicare group
Oakland, CA 94609
- Reassigned Medicare billing, California enrollment
- 62 clinicians in this Medicare group
Orange, TX 77630
- Reassigned Medicare billing, Texas enrollment
- 205 clinicians in this Medicare group
Arlington, WA 98223
- Reassigned Medicare billing, Washington enrollment
- 519 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 4
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Island Hospital
Acute Care Hospitals · Anacortes, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80027 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
LOUISVILLE, CO 80027
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 Maria Regina Oakes's NPI number?
The NPI number for Maria Regina Oakes is 1275588410. It was assigned to this individual provider in the NPPES registry on May 24, 2006.
Where is Maria Regina Oakes located?
Maria Regina Oakes practices at 100 Health Park Dr, Louisville, CO 80027. The listed phone number is (303) 673-1003.
What is Maria Regina Oakes's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Maria Regina Oakes enrolled in Medicare?
Yes. Maria Regina Oakes 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 Maria Regina Oakes's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maria Regina Oakes reassigns Medicare benefits to 9 organizations: Usacs Of Colorado Inc (Louisville, CO), Boulder Emergency Physicians PC (Lafayette, CO), Premier Emergency Services, Inc (Westminster, CO), Usacs Community Emergency Services Of Colorado, Inc. (Arvada, CO), Usacs Observation Medicine Services Of Colorado, Inc (Golden, CO) and 4 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 Maria Regina Oakes's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Maria Regina Oakes accept?
Health plans from Blue Cross and Blue Shield of Texas, Oscar Insurance Company and UnitedHealthcare list Maria Regina Oakes 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 Maria Regina Oakes affiliated with any hospitals?
According to CMS data, Maria Regina Oakes is affiliated with Island Hospital.
When was this NPI record last updated?
The NPPES record for Maria Regina Oakes was last updated on January 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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. Maria Regina F Oakes, MD · NPI 1275588410
Emergency Medicine physician in Louisville, Colorado. Individual provider, active in the CMS NPPES registry since May 24, 2006.
## Identity
- **NPI:** 1275588410 (Entity type: Individual)
- **Enumerated:** May 24, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** W1074 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 HEALTH PARK DR, Louisville, CO 80027-9583
- **Phone:** (303) 673-1003 · **Fax:** (303) 202-1281
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Usacs Of Colorado Inc (NPI 1851927693, Louisville, CO); Boulder Emergency Physicians PC (NPI 1407454317, Lafayette, CO); Premier Emergency Services, Inc (NPI 1962037440, Westminster, CO); Usacs Community Emergency Services Of Colorado, Inc. (NPI 1053824979, Arvada, CO); Usacs Observation Medicine Services Of Colorado, Inc (NPI 1689416059, Golden, CO); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 2003
## Record status
- **NPPES last updated:** January 6, 2026
- **Other identifiers:** Medicaid 49986538 (CO); Other 20326023101
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Source: [NPI Profile](https://npiprofile.com/npi/1275588410) · Data from the CMS NPPES public registry.