1. Home
  2. Directory
  3. Missouri
  4. O Fallon
  5. Physician Assistant
  6. NPI Profile

ERIN FRIESEN
NPI 1255028122
Physician Assistant in O Fallon, MO

Active since April 20, 2023PECOS EnrolledAccepts Medicare Assignment
2299 TECHNOLOGY DR STE 130, O FALLON, MO 63368(636) 695-0400(636) 916-9456 Get Directions Write a Review

NPPES record last updated: May 5, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 5, 2026, Sep 9, 2025, Sep 5, 2025 and 2 more (5 updates tracked since 2024).

About Erin Friesen NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ERIN FRIESEN (NPI 1255028122) is an individual physician assistant in O Fallon, Missouri, licensed in Missouri (2024037659) and active in the NPI registry since April 2023. She is enrolled in Medicare PECOS, is affiliated with St Lukes Hospital, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1255028122
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameERIN FRIESEN
Location Address2299 TECHNOLOGY DR STE 130O Fallon, MO 63368-7342
Mailing AddressPo Box 959354Saint Louis, MO 63195-9354 · (636) 695-0400 · Fax (636) 916-9456
Phone(636) 695-0400
Fax(636) 916-9456
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateApril 20, 2023
Last NPPES UpdateMay 5, 20265 updates tracked since enumeration
NPPES CertifiedMay 5, 2026
✔ NPI 1255028122 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in MO · 2024037659
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
2299 TECHNOLOGY DR STE 130, O Fallon, MO 63368
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Erin Friesen 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.

PECOS PAC ID1557858578
PECOS Enrollment IDI20251014002503
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Lukes Hospital

Acute Care Hospitals · Chesterfield, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260179
Location232 S Woods Mill RdChesterfield, MO 63017 · St. Louis County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63368 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KEVIN JAMES QUIGLEY M.D.
Orthopaedic Surgery (Sports Medicine)
2299 TECHNOLOGY DR STE 130
O FALLON, MO 63368
St. Charles County (636) 695-0400
MR. RALPH JAY SKITT PA-C
Physician Assistant
2299 TECHNOLOGY DR STE 130
O FALLON, MO 63368
St. Charles County (636) 695-0400
DR. ANTHONY J BERNI M.D.
Orthopaedic Surgery
2299 TECHNOLOGY DR STE 130
O FALLON, MO 63368
St. Charles County (636) 695-0400

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 Erin Friesen's NPI number?

The NPI number for Erin Friesen is 1255028122. It was assigned to this individual provider in the NPPES registry on April 20, 2023.

Where is Erin Friesen located?

Erin Friesen practices at 2299 Technology Dr Ste 130, O Fallon, MO 63368. The listed phone number is (636) 695-0400.

What is Erin Friesen's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Erin Friesen enrolled in Medicare?

Yes. Erin Friesen 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.

Is Erin Friesen affiliated with any hospitals?

According to CMS data, Erin Friesen is affiliated with St Lukes Hospital.

When was this NPI record last updated?

The NPPES record for Erin Friesen was last updated on May 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.