DR. PAUL R PFEIFFER DO
NPI 1821024803
Emergency Medicine in Saint Louis, MO
About Dr. Paul R Pfeiffer Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PAUL R PFEIFFER DO (NPI 1821024803) is an individual emergency medicine provider in Saint Louis, Missouri, licensed in Missouri (106284) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of At Still University Of Health Sciences, College Of Osteo Med, Kirksville (1994).
NPPES Registry Identity
Specialties & Licenses
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. Paul R Pfeiffer Do 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
8Medicare enrollment records show Paul Pfeiffer reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 241 clinicians in this Medicare group
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: Emergency Physicians Of St Lukes LLC
- 124 clinicians in this Medicare group
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- 186 clinicians in this Medicare group
Alton, IL 62002
- Reassigned Medicare billing, Missouri enrollment
- 343 clinicians in this Medicare group
Festus, MO 63028
- Reassigned Medicare billing, Missouri enrollment
- 118 clinicians in this Medicare group
Winfield, MO 63389
- Reassigned Medicare billing, Missouri enrollment
- 229 clinicians in this Medicare group
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 178 clinicians in this Medicare group
Cuba, MO 65453
- Reassigned Medicare billing, Missouri enrollment
- Also billed through NPI 1245277631 (Missouri)
- 1,487 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63131 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.
SAINT LOUIS, MO 63131
SAINT LOUIS, MO 63131
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 Paul Pfeiffer's NPI number?
The NPI number for Paul Pfeiffer is 1821024803. It was assigned to this individual provider in the NPPES registry on June 23, 2006.
Where is Paul Pfeiffer located?
Paul Pfeiffer practices at 3015 N Ballas Rd, Saint Louis, MO 63131. The listed phone number is (314) 996-5225.
What is Paul Pfeiffer's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Paul Pfeiffer enrolled in Medicare?
Yes. Paul Pfeiffer 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 Paul Pfeiffer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Paul Pfeiffer reassigns Medicare benefits to 8 organizations: Mercy Hospitals East Communities (Saint Louis, MO), Emergency Physicians Of St. Luke's, LLC (Chesterfield, MO), Mercy Hospital South (Saint Louis, MO), Southeastern Emergency Physicians Of Memphis LLC (Alton, IL), Mercy Hospital Jefferson (Festus, MO) and 3 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 Paul Pfeiffer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Paul Pfeiffer accept?
Health plans from Anthem Blue Cross and Blue Shield, Health Advantage, Octave and Oscar Insurance Company list Paul Pfeiffer 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 Paul Pfeiffer affiliated with any hospitals?
According to CMS data, Paul Pfeiffer is affiliated with Mercy Hospital St Louis.
When was this NPI record last updated?
The NPPES record for Paul Pfeiffer was last updated on September 18, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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. Paul R Pfeiffer, DO · NPI 1821024803
Emergency Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 23, 2006.
## Identity
- **NPI:** 1821024803 (Entity type: Individual)
- **Enumerated:** June 23, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 106284 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 3015 N BALLAS RD, Saint Louis, MO 63131-2329
- **Phone:** (314) 996-5225 · **Fax:** (314) 991-0943
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Mercy Hospitals East Communities (NPI 1427098169, Saint Louis, MO); Emergency Physicians Of St. Luke's, LLC (NPI 1215359815, Chesterfield, MO); Mercy Hospital South (NPI 1568481984, Saint Louis, MO); Southeastern Emergency Physicians Of Memphis LLC (NPI 1437105277, Alton, IL); Mercy Hospital Jefferson (NPI 1508859661, Festus, MO); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** At Still University Of Health Sciences, College Of Osteo Med, Kirksville, class of 1994
## Record status
- **NPPES last updated:** September 18, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1821024803) · Data from the CMS NPPES public registry.