What is Mark Southard's NPI number?

Mark Southard's National Provider Identifier (NPI) is 1003868811, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Southard's specialty?

Mark Southard is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).

Where is Mark Southard located?

Mark Southard's practice location on file with NPPES is 900 W Clairmont Ave, Eau Claire, WI 54701.

What is Mark Southard's phone number?

The practice phone number listed in the NPPES registry for Mark Southard is (715) 839-4151.

Does Mark Southard accept Medicare?

Mark Southard is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Mark Southard's NPI active?

Yes — Mark Southard's NPI (1003868811) is active in the NPPES registry as of the last update on 2022-01-05.

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Mark Southard, MD

NPI 1003868811 · Diagnostic Radiology Physician · Eau Claire, WI

Mark Southard, MD is a Diagnostic Radiology Physician provider in Eau Claire, WI (NPI 1003868811).

Provider details

NPI number: 1003868811
Entity type: Individual
Primary specialty: Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 45008 (WI)

Practice location

900 W Clairmont Ave

Eau Claire, WI 54701

Phone: (715) 839-4151

Street-level locationGet directions

More WI providers

Mailing address

2715 West Frank St

Eau Claire, WI 54703

Specialties & taxonomies

Diagnostic Radiology PhysicianPrimary2085R0202XLicense 45008 (WI)
Allopathic & Osteopathic Physicians
Body Imaging Physician2085B0100XLicense 45008 (WI)
Allopathic & Osteopathic Physicians
Diagnostic Ultrasound Physician2085U0001XLicense 45008 (WI)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(85/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
20 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
1 documented practice location
Medicare service volume (vs. specialty peers)28% of score
3,719 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
X-Ray of Chest, 1 View71045	412	$8
X-Ray of Chest, 2 Views71046	258	$10
Ct Scan Head Or Brain Without Contrast70450	187	$38
Ct Scan of Abdomen and Pelvis With Contrast74177	170	$84
X-Ray of Chest, 2 Views71046	126	$12
Screening Mammography77067	91	$33

Enumerated: 2006-05-17
Last updated: 2022-01-05
Certified: 2022-01-05

Frequently asked questions

What is Mark Southard's NPI number?: Mark Southard's National Provider Identifier (NPI) is 1003868811, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mark Southard's specialty?: Mark Southard is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
Where is Mark Southard located?: Mark Southard's practice location on file with NPPES is 900 W Clairmont Ave, Eau Claire, WI 54701.
What is Mark Southard's phone number?: The practice phone number listed in the NPPES registry for Mark Southard is (715) 839-4151.
Does Mark Southard accept Medicare?: Mark Southard is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Mark Southard's NPI active?: Yes — Mark Southard's NPI (1003868811) is active in the NPPES registry as of the last update on 2022-01-05.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)