Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. WILLIAM ANDREW DAY MD
NPI 1235716440
Orthopaedic Surgery in Jackson, MS

Active since March 24, 2021PECOS Enrolled
1325 E FORTIFICATION ST, JACKSON, MS 39202(601) 354-4488(601) 351-5980 Get Directions Write a Review

NPPES record last updated: July 20, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 20, 2026, Jul 29, 2021, Mar 24, 2021 (3 updates tracked since 2021).

About Dr. William Andrew Day Md NPPES

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

DR. WILLIAM ANDREW DAY MD (NPI 1235716440) is an individual orthopaedic surgery provider in Jackson, Mississippi, licensed in Mississippi (36709) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1235716440
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameDR. WILLIAM ANDREW DAYCredential: MD
Location Address1325 E FORTIFICATION STJackson, MS 39202-2442
Mailing Address1325 E Fortification StJackson, MS 39202-2442 · (601) 354-4488 · Fax (601) 351-5980
Fax(601) 351-5980
Sole ProprietorNo
Enumeration DateMarch 24, 2021
Last NPPES UpdateJuly 20, 20263 updates tracked since enumeration
NPPES CertifiedJuly 20, 2026
NPI 1235716440 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License Licensed in MS · 36709
Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

1325 E FORTIFICATION ST, Jackson, MS 39202

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Dr. William Andrew Day Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 39202 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
$80.50 typical visit price
range $51.65 – $159.18
Typical copayment $20.12 (range $12.91 – $39.79)
Most-billed visit code 99203
Established Patient
$64.96 typical visit price
range $16.15 – $129.61
Typical copayment $16.24 (range $4.03 – $32.40)
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.

Specialist/Technologist (Athletic Trainer)
1325 E FORTIFICATION ST
JACKSON, MS 39202
Orthopaedic Surgery (Adult Reconstructive Orthopaedic Surgery)
1325 E FORTIFICATION ST
JACKSON, MS 39202
Orthopaedic Surgery
1325 E FORTIFICATION ST
JACKSON, MS 39202
Orthopaedic Surgery
1325 E FORTIFICATION ST
JACKSON, MS 39202
Physician Assistant (Surgical)
1325 E FORTIFICATION ST
JACKSON, MS 39202
Registered Nurse (Registered Nurse First Assistant)
1325 E FORTIFICATION ST
JACKSON, MS 39202
Nurse Practitioner (Family)
1325 E FORTIFICATION ST
JACKSON, MS 39202
Orthopaedic Surgery
1325 E FORTIFICATION ST
JACKSON, MS 39202

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 William Day's NPI number?

The NPI number for William Day is 1235716440. It was assigned to this individual provider in the NPPES registry on March 24, 2021.

Where is William Day located?

William Day practices at 1325 E Fortification St, Jackson, MS 39202. The listed phone number is (601) 354-4488.

What is William Day's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is William Day enrolled in Medicare?

Yes. William Day is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for William Day was last updated on July 20, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.