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

DR. MARK RAY MCILWAIN DMD, MD
NPI 1720045685
Oral & Maxillofacial Surgery in Sheffield, AL

Q: What is Mark Mcilwain's NPI number?

The NPI number for Mark Mcilwain is 1720045685. It was assigned to this individual provider in the NPPES registry on April 26, 2006.

Q: What is Mark Mcilwain's specialty?

The primary specialty registered for this NPI is Oral & Maxillofacial Surgery with taxonomy code 204E00000X.

Q: Is Mark Mcilwain enrolled in Medicare?

No. Mark Mcilwain has opted out of Medicare through September 4, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Mark Mcilwain was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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.

Active since April 26, 2006Opted out of Medicare · through Sep 4, 2026

398 ASHE BLVD, SHEFFIELD, AL 35660(256) 383-1499(256) 383-9135 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

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About Dr. Mark Ray Mcilwain Dmd, Md NPPES

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

DR. MARK RAY MCILWAIN DMD, MD (NPI 1720045685) is an individual oral & maxillofacial surgery provider in Sheffield, Alabama, licensed in Alabama (00016147) and active in the NPI registry since April 2006. He has opted out of Medicare through September 4, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1720045685

Entity TypeIndividualMale

Primary Taxonomy204E00000X

Provider Legal NameDR. MARK RAY MCILWAINCredential: DMD, MD

Location Address398 ASHE BLVDSheffield, AL 35660-1729

Mailing Address398 Ashe BlvdSheffield, AL 35660-1729 · (256) 383-1499 · Fax (256) 383-9135

Phone(256) 383-1499

Fax(256) 383-9135

Sole ProprietorNo

Enumeration DateApril 26, 2006

Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration

✔ NPI 1720045685 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOral & Maxillofacial SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code204E00000X

License✔ Licensed in AL · 00016147

Definition

Oral and maxillofacial surgeons are trained to recognize and treat a wide spectrum of diseases, injuries and defects in the head, neck, face, jaws and the hard and soft tissues of the oral and maxillofacial region. They are also trained to administer anesthesia, and provide care in an office setting. They are trained to treat problems such as the extraction of wisdom teeth, misaligned jaws, tumors and cysts of the jaw and mouth, and to perform dental implant surgery.

Also ListedDentist · Oral and Maxillofacial SurgeryTaxonomy 1223S0112X · License LNO3783 (AL)

398 ASHE BLVD, Sheffield, AL 35660

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Magnolia Health, Ambetter Health, Ambetter of Alabama and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

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Opted out of Medicare

Dr. Mark Ray Mcilwain Dmd, Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from September 4, 2024 through September 4, 2026.

Opt-Out Effective DateSeptember 4, 2024

Opt-Out In Effect ThroughSeptember 4, 2026Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 7

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

ORAL & FACIAL SURGERY OF THE SHOALS, L.L.C.

Dentist (Oral and Maxillofacial Surgery)