MICHAEL WARREN PORTER M.D.
NPI 1821388620
Emergency Medicine in Oklahoma City, OK
About Michael Warren Porter M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL WARREN PORTER M.D. (NPI 1821388620) is an individual emergency medicine provider in Oklahoma City, Oklahoma, licensed in Oklahoma (28449) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS, is affiliated with Norman Regional, and maintains a secondary practice location in Norman.
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
Michael Warren Porter 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
6Medicare enrollment records show Michael Porter reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oklahoma City, OK 73104
- Reassigned Medicare billing, Oklahoma enrollment
- 1,795 clinicians in this Medicare group
Oklahoma City, OK 73102
- Reassigned Medicare billing, Oklahoma enrollment
- Medicare enrollment name: Emergency Physicians Of Mid-America PC
- 310 clinicians in this Medicare group
Norman, OK 73072
- Reassigned Medicare billing, Oklahoma enrollment
- 65 clinicians in this Medicare group
Norman, OK 73071
- Reassigned Medicare billing, Oklahoma enrollment
- 418 clinicians in this Medicare group
Lawton, OK 73505
- Reassigned Medicare billing, Oklahoma enrollment
- 96 clinicians in this Medicare group
Tulsa, OK 74104
- Reassigned Medicare billing, Oklahoma enrollment
- 162 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 3
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Norman Regional
Acute Care Hospitals · Norman, OKO U Medical Center
Acute Care Hospitals · Oklahoma City, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 73104 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OKLAHOMA CITY, OK 73104
OKLAHOMA CITY, OK 73104
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 Porter's NPI number?
The NPI number for Michael Porter is 1821388620. It was assigned to this individual provider in the NPPES registry on April 13, 2011.
Where is Michael Porter located?
Michael Porter practices at 700 NE 13th St, Oklahoma City, OK 73104. The listed phone number is (405) 764-8066.
What is Michael Porter's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Michael Porter enrolled in Medicare?
Yes. Michael Porter 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 Michael Porter's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Porter reassigns Medicare benefits to 6 organizations: Ou Health Partners, Inc (Oklahoma City, OK), Emergency Physicians Of Mid-America, P.C. (Oklahoma City, OK), Norman Regional Hospital Authority (Norman, OK), Emergency Services Of Oklahoma PC (Norman, OK), Oklahoma Emergency Services PC (Lawton, OK) and 1 more organization, 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 Michael Porter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Porter accept?
Health plans from Blue Cross and Blue Shield of Oklahoma list Michael Porter 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 Michael Porter affiliated with any hospitals?
According to CMS data, Michael Porter is affiliated with Norman Regional and O U Medical Center.
When was this NPI record last updated?
The NPPES record for Michael Porter was last updated on February 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Michael Warren Porter, M.D. · NPI 1821388620
Emergency Medicine physician in Oklahoma City, Oklahoma. Individual provider, active in the CMS NPPES registry since April 13, 2011.
## Identity
- **NPI:** 1821388620 (Entity type: Individual)
- **Enumerated:** April 13, 2011
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 28449 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 700 NE 13TH ST, Oklahoma City, OK 73104-5004
- **Phone:** (405) 764-8066 · **Fax:** (405) 271-1001
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Ou Health Partners, Inc (NPI 1528642642, Oklahoma City, OK); Emergency Physicians Of Mid-America, P.C. (NPI 1063825297, Oklahoma City, OK); Norman Regional Hospital Authority (NPI 1912563727, Norman, OK); Emergency Services Of Oklahoma PC (NPI 1215249891, Norman, OK); Oklahoma Emergency Services PC (NPI 1114239795, Lawton, OK); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Oklahoma College Of Medicine, class of 2011
## Record status
- **NPPES last updated:** February 24, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1821388620) · Data from the CMS NPPES public registry.