Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ALEXANDRIA WILLIAMS MD
NPI 1255724811
Obstetrics & Gynecology - Maternal & Fetal Medicine in Evanston, IL

Q: What is Alexandria Williams's NPI number?

The NPI number for Alexandria Williams is 1255724811. It was assigned to this individual provider in the NPPES registry on March 6, 2015.

Q: What is Alexandria Williams's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Active since March 06, 2015PECOS Enrolled

2650 RIDGE AVE STE 1420, EVANSTON, IL 60201(847) 570-2860 Get Directions Write a Review

NPPES record last updated: July 30, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Alexandria Williams Md NPPES

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

ALEXANDRIA WILLIAMS MD (NPI 1255724811) is an individual maternal & fetal medicine provider in Evanston, Illinois, licensed in Illinois (036176795) and active in the NPI registry since March 2015. She is enrolled in Medicare PECOS, maintains a secondary practice location in Boston, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1255724811

Entity TypeIndividualFemale

Primary Taxonomy207VM0101X

Provider Legal NameALEXANDRIA WILLIAMSCredential: MD

Location Address2650 RIDGE AVE STE 1420Evanston, IL 60201-1700

Mailing Address2650 Ridge Ave Ste 1223Evanston, IL 60201-1700 · (847) 570-2040 · Fax (847) 733-5315

Phone(847) 570-2860

Sole ProprietorYes

Medical School CMSOtherGraduated 2018

Enumeration DateMarch 6, 2015

Last NPPES UpdateJuly 30, 2026

NPPES CertifiedJuly 30, 2026

✔ NPI 1255724811 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207VM0101X

License✔ Licensed in IL · 036176795

Definition

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License 036176795 (IL)

2650 RIDGE AVE STE 1420, Evanston, IL 60201

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Secondary Practice Location 1

Location 175 Francis StBoston, MA 02115-6106 · Phone (617) 732-5500

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.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

Alexandria Williams Md 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 ID7012394398

PECOS Enrollment IDI20250710002502

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60201 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$74.80 typical visit price

range $18.97 – $148.12

Typical copayment $18.70 (range $4.74 – $37.03)

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 5

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

AMELIA K RICHARDSON MS, CGC

Genetic Counselor, MS