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

Mark Cal Shaw, MD

Individual provider Family Medicine Physician · NPI 1881644938

Mark Cal Shaw, MD practises Emergency Medicine in Bernice, Louisiana. Graduated from University of Texas Medical School at Houston in 1996, 30 years ago. Practices with Ess of Nacogdoches LLC, a 27-clinician group and accepts Medicare assignment. Licensed in Louisiana and Texas.

Years since qualifying
30
Trained at
University of Texas Medical School at Houston
Licensed in
LA, TX
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

402 Second St
Bernice, LA 71222 Not confirmed with CMS for 11 years — call before visiting
Phone: (318) 285-9066
Fax: (318) 285-9065
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD023225 (LA)
Emergency Medicine Physician Taxonomy 207P00000X · Licence M9001 (TX)

Record details

NPI number1881644938
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 11, 2006
Last updated in NPPESOctober 7, 2015

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesFAMILY PRACTICE
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT HOUSTON
Graduated 1996 (30 years in practice)
Group practice Ess Of Nacogdoches Llc — 27 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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 patients265
Services billed 331 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 Ess of Nacogdoches LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 27 clinicians in the practice; 12 are shown here.

Other providers in Bernice