Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mark Britt Holder, MD

Individual provider Internal Medicine Physician · NPI 1861452260

Dr. Mark Britt Holder, MD practises Emergency Medicine in Huntsville, Alabama. Graduated from Louisiana State University School of Medicine in New Orleans in 2000, 26 years ago. Practices with Allegiance Hospital of Many, LLC, a 39-clinician group and accepts Medicare assignment. Licensed in Alabama.

Years since qualifying
26
Trained at
Louisiana State University School of Medicine in New Orleans
Licensed in
AL
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

101 Sivley Rd SW
Huntsville, AL 35801-4421
Phone: (256) 265-3880
Fax: (256) 265-3886
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 26900 (AL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 26900 (AL)

Record details

NPI number1861452260
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 28, 2006
Last updated in NPPESApril 20, 2017

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolLOUISIANA STATE UNIVERSITY SCHOOL OF MEDICINE IN NEW ORLEANS
Graduated 2000 (26 years in practice)
Group practice Allegiance Hospital Of Many, Llc — 39 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of nail tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients260
Services billed 753 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Allegiance Hospital of Many, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 39 clinicians in the practice; 12 are shown here.

Other providers in Huntsville