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ERIN BAYLEE ARMSTRONG PA
NPI 1700755766
Physician Assistant in Chickasha, OK

Active since October 30, 2025PECOS EnrolledAccepts Medicare Assignment
2100 W IOWA AVE, CHICKASHA, OK 73018(405) 224-2100(405) 779-2233 Get Directions Write a Review

NPPES record last updated: July 16, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About Erin Baylee Armstrong Pa NPPES

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

ERIN BAYLEE ARMSTRONG PA (NPI 1700755766) is an individual physician assistant in Chickasha, Oklahoma and active in the NPI registry since October 2025. She is enrolled in Medicare PECOS, is affiliated with Grady Memorial Hospital, and is a graduate of Other (2025).

NPPES Registry Identity

NPI1700755766
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameERIN BAYLEE ARMSTRONGCredential: PA
Location Address2100 W IOWA AVEChickasha, OK 73018-2736
Mailing Address2100 W Iowa AveChickasha, OK 73018-2736 · (405) 224-2100 · Fax (405) 779-2233
Phone(405) 224-2100
Fax(405) 779-2233
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateOctober 30, 2025
Last NPPES UpdateJuly 16, 2026
NPPES CertifiedJuly 16, 2026
✔ NPI 1700755766 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
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.
2100 W IOWA AVE, Chickasha, OK 73018
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Other Names 1

Former Name (1)Erin Williams

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 Baylee Armstrong Pa 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 ID446733372
PECOS Enrollment IDI20260310001697
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.

Grady Memorial Hospital

Acute Care Hospitals · Chickasha, OK
3/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number370054
Location2220 Iowa StreetChickasha, OK 73018 · Grady County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73018 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
$82.46 typical visit price
range $53.00 – $162.61
Typical copayment $20.61 (range $13.25 – $40.65)
Most-billed visit code 99203
Established Patient
$66.48 typical visit price
range $16.68 – $132.40
Typical copayment $16.62 (range $4.17 – $33.10)
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 20

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

KEVIN ANDERSON D.O.
Family Medicine
2100 W IOWA AVE, SUITE A
CHICKASHA, OK 73018
Grady County (405) 224-2100
GRADY MEMORIAL HOSPITAL
Clinic/Center (Rural Health)
2100 W IOWA AVE, SUITE A
CHICKASHA, OK 73018
Grady County (405) 224-2100
ROBERT T BUCHANAN MD
Surgery
2100 W IOWA AVE
CHICKASHA, OK 73018
Grady County (405) 224-2100
JERRUS HARRIS FNP-C
Nurse Practitioner (Family)
2100 W IOWA AVE, SUITE A
CHICKASHA, OK 73018
Grady County (405) 224-2100
DR. THOMAS LEE WICKS DPM
Podiatrist
2100 W IOWA AVE
CHICKASHA, OK 73018
Grady County (405) 224-2100
DIADRA LORSEH PA-C
Physician Assistant
2100 W IOWA AVE
CHICKASHA, OK 73018
Grady County (405) 224-2100
MS. DEVON JESSICA MUNCY PA-C
Physician Assistant
2100 W IOWA AVE
CHICKASHA, OK 73018
Grady County (405) 224-2100
ANUPAMA BEKKEM M.D.
Internal Medicine
2100 W IOWA AVE
CHICKASHA, OK 73018
Grady County (405) 224-2100

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 Armstrong's NPI number?

The NPI number for Erin Armstrong is 1700755766. It was assigned to this individual provider in the NPPES registry on October 30, 2025. The provider is also known as Erin Williams.

Where is Erin Armstrong located?

Erin Armstrong practices at 2100 W Iowa Ave, Chickasha, OK 73018. The listed phone number is (405) 224-2100.

What is Erin Armstrong's specialty?

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

Is Erin Armstrong enrolled in Medicare?

Yes. Erin Armstrong 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 Armstrong affiliated with any hospitals?

According to CMS data, Erin Armstrong is affiliated with Grady Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Erin Armstrong was last updated on July 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.