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MARK L HERRING M.D., S.C.
NPI 1184922320
Internal Medicine in Manitowoc, WI

Active since March 12, 2011CLIA 52D1078191 · Waiver
1355 JOHNSTON DR, MANITOWOC, WI 54220(920) 682-2747(920) 686-1498 Get Directions Write a Review

NPPES record last updated: March 12, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mark L Herring M.d., S.c. NPPES

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

MARK L HERRING M.D., S.C. (NPI 1184922320) is a healthcare organization registered as an internal medicine in Manitowoc, Wisconsin and active in the NPI registry since March 2011. The organization holds a CLIA Waiver certificate valid through January 2, 2028 and lists Mark L Herring, President, as its authorized official.

NPPES Registry Identity

NPI1184922320
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameMARK L HERRING M.D., S.C.
Location Address1355 JOHNSTON DRManitowoc, WI 54220-2131
Mailing Address1355 Johnston DrManitowoc, WI 54220-2131 · (920) 682-2747 · Fax (920) 686-1498
Phone(920) 682-2747
Fax(920) 686-1498
Organization SubpartNo
Authorized OfficialMark L HerringPresident · (920) 682-2747
Enumeration DateMarch 12, 2011
✔ NPI 1184922320 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WI · 24825
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1355 JOHNSTON DR, Manitowoc, WI 54220
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Other Identifiers 2

Medicare PIN000038169WI
Medicare UPINB53578

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark L Herring M.d., S.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Mark L Herring M.D., S.C., which bills Medicare for the services this clinician delivers.

Clinician (1)

Mark Herring, M.D.
Internal Medicine
NPI 1386766368
1355 JOHNSTON DR
Manitowoc, WI 54220
(920) 682-2747
✔ PECOSSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 52D1078191

Mark L Herring, MD, Sc · Manitowoc, WI
Active · expires Jan 2, 2028
CLIA Number52D1078191
Laboratory TypePhysician Office
Certificate Effective DateJanuary 3, 2026
Certificate Expiration DateJanuary 2, 2028
Laboratory DirectorMark L. Herring, MD
Laboratory Phone(920) 682-2747
Laboratory LocationMark L Herring, MD, Sc1355 Johnston Dr, Manitowoc, WI 54220
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Mark L Herring M.D., S.C.'s NPI number?

The NPI number for Mark L Herring M.D., S.C. is 1184922320. It was assigned to this organization in the NPPES registry on March 12, 2011.

Where is Mark L Herring M.D., S.C. located?

Mark L Herring M.D., S.C. is located at 1355 Johnston Dr, Manitowoc, WI 54220. The listed phone number is (920) 682-2747.

What is Mark L Herring M.D., S.C.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mark L Herring M.D., S.C. enrolled in Medicare?

Yes. Mark L Herring M.D., S.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Mark L Herring M.D., S.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Mark L Herring M.D., S.C.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Mark L Herring M.D., S.C. hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 52D1078191) is associated with this NPI, valid through January 2, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Mark L Herring M.D., S.C. was last updated on March 12, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years 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.