Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William B. Mehard, MD

Diagnostic Radiology Physician in Chesterfield, MO · enumerated 2006 · practices at Greenbrook Tms St Louis, LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1548293673

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Registry record

Entity type Individual (Type 1)

Name Dr. William B. Mehard

Credential MD

Sex Male

Practice address 16091 Swingley Ridge Rd Ste 100, Chesterfield, MO, 63017

Phone (314) 238-5260

Fax (314) 821-1833

Enumeration date Jul 9, 2006

Last updated in NPPES Jul 24, 2025

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 21769 (WV) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 47536-020 (WI) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 0101240978 (VA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 39195 (TN) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD459690 (PA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 39889 (KY) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 036112582 (IL) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 04330951 (KS) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 105364 (MO) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
209727817	Medicaid	MO	-
Q047518	Medicaid	TN	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1548293673 active?

Yes, as of the latest NPPES snapshot, NPI 1548293673 is active (record last updated 2025-07-24).

How do I verify William Mehard's NPI record?

Cross-check NPI 1548293673 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Edward Downey Diagnostic Radiology Physician · Chesterfield, MO NPI 1861400467 Jyothi Mandava Psychiatry Physician · Chesterfield, MO NPI 1891809539 Archana Abhyankar Diagnostic Radiology Physician · Chesterfield, MO NPI 1477710051 Greenbrook Tms St Louis, LLC Psychiatry Physician · Chesterfield, MO NPI 1144713884

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-24.