RUTH L WILLIAMS PA-C
NPI 1952745903
Physician Assistant in Saint Louis, MO

Active since April 22, 2013PECOS EnrolledAccepts Medicare Assignment
625 S NEW BALLAS RD, SAINT LOUIS, MO 63141(314) 251-0175 Get Directions Write a Review

NPPES record last updated: March 22, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 13, 2023, Nov 30, 2015 (2 updates tracked since 2015).

About Ruth L Williams Pa-c NPPES

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

RUTH L WILLIAMS PA-C (NPI 1952745903) is an individual physician assistant in Saint Louis, Missouri, licensed in Missouri (2022013795) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Other (2012).

NPPES Registry Identity

NPI1952745903
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameRUTH L WILLIAMSCredential: PA-C
Location Address625 S NEW BALLAS RDSaint Louis, MO 63141-8240
Mailing Address625 S New Ballas RdSaint Louis, MO 63141-8240 · (314) 251-0175
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateApril 22, 2013
Last NPPES UpdateMarch 22, 20242 updates tracked since enumeration
NPPES CertifiedMarch 22, 2024
NPI 1952745903 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License Licensed in MO · 2022013795
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.

Also ListedPhysician Assistant · MedicalTaxonomy 363AM0700X · License 1774 (NE), 085004642 (IL)
625 S NEW BALLAS RD, Saint Louis, MO 63141

Accepted 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

Ruth L Williams 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 ID1850531633
PECOS Enrollment IDI20230718003346
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.

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
13 services13 patients

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, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260020
Location615 New Ballas RoadSaint Louis, MO 63141 · St. Louis County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63141 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 20

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

Emergency Medicine
625 S NEW BALLAS RD
SAINT LOUIS, MO 63141
Nurse Practitioner (Adult Health)
625 S NEW BALLAS RD, SUITE 2030
SAINT LOUIS, MO 63141
Internal Medicine (Cardiovascular Disease)
625 S NEW BALLAS RD, SUITE #2015
SAINT LOUIS, MO 63141
Internal Medicine (Cardiovascular Disease)
625 S NEW BALLAS RD, SUITE 2030
SAINT LOUIS, MO 63141
Internal Medicine (Cardiovascular Disease)
625 S NEW BALLAS RD, SUITE 2030
SAINT LOUIS, MO 63141
Physician Assistant (Surgical)
625 S NEW BALLAS RD
SAINT LOUIS, MO 63141
Internal Medicine (Critical Care Medicine)
625 S NEW BALLAS RD
SAINT LOUIS, MO 63141
Emergency Medicine
625 S NEW BALLAS RD
SAINT LOUIS, MO 63141

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 Ruth Williams's NPI number?

The NPI number for Ruth Williams is 1952745903. It was assigned to this individual provider in the NPPES registry on April 22, 2013.

Where is Ruth Williams located?

Ruth Williams practices at 625 S New Ballas Rd, Saint Louis, MO 63141. The listed phone number is (314) 251-0175.

What is Ruth Williams's specialty?

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

Is Ruth Williams enrolled in Medicare?

Yes. Ruth Williams 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 Ruth Williams accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 3 other insurers list Ruth Williams 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 Ruth Williams affiliated with any hospitals?

According to CMS data, Ruth Williams is affiliated with Mercy Hospital St Louis.

When was this NPI record last updated?

The NPPES record for Ruth Williams was last updated on March 22, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.