Maria Regina F. Oakes, MD
Emergency Medicine Physician · Louisville, CO
Maria Regina F. Oakes, MD is an emergency medicine physician with a practice address in Louisville, Colorado, and NPI 1275588410, issued on May 24, 2006. Check the license (Colorado 47889, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Maria Regina F. Oakes
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 47889 CO
W1074 TX
MD00049404 WA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Health Park Dr, Louisville, CO 80027
- Phone
- (303) 673-1003
- Enumerated
- May 24, 2006
- Record last updated
- Jan 6, 2026
- Fax
- (303) 202-1281
- Medicaid ID
- 49986538 CO
- Medicare enrollment
- Enrolled (PECOS I20081216000155); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2003
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,434 in Colorado → Look up another NPI →
Also registered at 100 Health Park Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Ahlberg, RDRegistered Dietitian1609217124
- Kimberly Beck, NNPNeonatal Nurse Practitioner1730811472
- Amy Berens, RDRegistered Dietitian1679152409
- Derek Berg, DOInternal Medicine Physician1194896969
- Jennifer Blair, M.D.Family Medicine Physician1053587741
- Yaicha Bryan, PAPhysician Assistant1689076861
Verify Maria Regina F. Oakes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 47889Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average emergency medicine physician in 2024
192 Medicare Part D claims for 131 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Cephalexin14 claims
- Ibuprofen14 claims
- Prednisone12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 3 group practices
- Brighton Community Emergency Physicians, LpaBrighton, CO
- Northwest Emergency Physicians LLCEnumclaw, WA
- Usacs OF Colorado IncLittleton, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria Regina F. Oakes among 1,434 emergency medicine physician records in Colorado
Maria Regina F. Oakes, MD is one of 1,434 emergency medicine physician records with a practice address in Colorado. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 57% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2003 · median 2011 among the 810 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Colorado
There are 1,434 emergency medicine physician records in Colorado.
All 1,434 in Colorado → Every provider in Louisville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Vassily Eliopoulos, MDSuperior, CO 800271215149463
- Geoffrey Geer, M.D.Louisville, CO 800271396728481
- Ronald Linton, M.D.Louisville, CO 800271629054887
- Joe Turnbow, M.D.Louisville, CO 800271952461634
- Ming-Jay Wu, M.D.Louisville, CO 800271689650699
- Jordan Ancmon, DOLafayette, CO 800261184284515
- Kathryn Eastley Krughoff, MDLafayette, CO 800261285052829
- George Gilmore, PALafayette, CO 800261609840966
Common questions
What is Maria Regina F. Oakes, MD's NPI number?
Maria Regina F. Oakes, MD's National Provider Identifier (NPI) is 1275588410, issued on May 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maria Regina F. Oakes, MD located?
The NPPES record lists a practice address at 100 Health Park Dr, Louisville, CO, 80027. Phone: (303) 673-1003. Providers update this record themselves, so call before visiting.
How can I verify Maria Regina F. Oakes, MD's license?
NPPES lists Colorado license number 47889, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maria Regina F. Oakes, MD prescribe under Medicare Part D?
In 2024, Maria Regina F. Oakes, MD had 192 Medicare Part D claims for 131 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.