1. Home
  2. Directory
  3. Pennsylvania
  4. King Of Prussia
  5. Physician Assistant
  6. NPI Profile

MRS. ALEXIS SIERRA FOSTER PA-C
NPI 1346840972
Physician Assistant - Medical in King Of Prussia, PA

Active since November 01, 2020PECOS EnrolledAccepts Medicare Assignment
150 S WARNER RD STE 130, KING OF PRUSSIA, PA 19406(610) 400-4885(610) 273-5542 Get Directions Write a Review

NPPES record last updated: March 17, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 17, 2026, May 2, 2022, Aug 13, 2021 (3 updates tracked since 2021).

About Mrs. Alexis Sierra Foster Pa-c NPPES

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

MRS. ALEXIS SIERRA FOSTER PA-C (NPI 1346840972) is an individual medical provider in King Of Prussia, Pennsylvania, licensed in Pennsylvania (MA063973) and active in the NPI registry since November 2020. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1346840972
Entity TypeIndividualFemale
Primary Taxonomy363AM0700X
Provider Legal NameMRS. ALEXIS SIERRA FOSTERCredential: PA-C
Location Address150 S WARNER RD STE 130King Of Prussia, PA 19406-2830
Mailing Address505 Old Stage RdErwin, TN 37650-1564 · (423) 220-9975
Phone(610) 400-4885
Fax(610) 273-5542
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateNovember 1, 2020
Last NPPES UpdateMarch 17, 20263 updates tracked since enumeration
NPPES CertifiedMarch 17, 2026
✔ NPI 1346840972 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AM0700X
Licenses✔ Licensed in PA · MA063973✔ Licensed in TN · 4322
Also ListedPhysician AssistantTaxonomy 363A00000X · License 1502598 (KS)
Also ListedClinical Nurse Specialist · Psychiatric/Mental HealthTaxonomy 364SP0808X · License 1502598 (KS)
150 S WARNER RD STE 130, King Of Prussia, PA 19406
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1505 Old Stage RdErwin, TN 37650-1564 · Phone (423) 220-9975
Location 28016 State Line Rd Ste 205Prairie Village, KS 66208-3713 · Phone (610) 400-4885 · Fax (610) 273-5542

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

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

Mrs. Alexis Sierra Foster Pa-c 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 ID6406245562
PECOS Enrollment IDI20230126002643, I20230127000211
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.

Areas of Expertise CMS Part B claims

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
37 services16 patients

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.

MR. MARCUS L. PRESSLEY LPC
Counselor (Professional)
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (267) 416-0139
AVINA KHIATANI PH.D.
Psychologist
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (484) 705-0585
MRS. ELIZABETH R PEART LCSW
Social Worker (Clinical)
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (484) 868-9870
CENTER FOR CBT & THERAPEUTIC HEALING
Clinic/Center (Mental Health (Including Community Mental Health Center))
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (267) 225-3936
HANGIL RUTH HAN
Counselor (Professional)
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (610) 716-5576
JACLYN S CIMILUCA I RDN
Dietitian, Registered
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (973) 464-4264
MARTISHA BROWN
Counselor (Professional)
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (484) 441-3413
2 CROWS LLC
Psychiatry & Neurology (Psychiatry)
150 S WARNER RD STE 130
KING OF PRUSSIA, PA 19406
Montgomery County (610) 510-4881

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 Alexis Foster's NPI number?

The NPI number for Alexis Foster is 1346840972. It was assigned to this individual provider in the NPPES registry on November 1, 2020.

Where is Alexis Foster located?

Alexis Foster practices at 150 S Warner Rd Ste 130, King Of Prussia, PA 19406. The listed phone number is (610) 400-4885.

What is Alexis Foster's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Is Alexis Foster enrolled in Medicare?

Yes. Alexis Foster 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.

What insurance does Alexis Foster accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 2 other insurers list Alexis Foster 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.

When was this NPI record last updated?

The NPPES record for Alexis Foster was last updated on March 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.