Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. Merrith Roger Karl III, FNP-C

Individual provider Nurse Practitioner · NPI 1669800546

Mr. Merrith Roger Karl III, FNP-C is a Nurse Practitioner in Humble, Texas. Graduated from George Washington University School of Medicine in 2013, 13 years ago. Practices with Memorial Hermann Hospital Based Physician Group, a 269-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
13
Trained at
George Washington University School of Medicine
Licensed in
TX
In the registry since
2013
Specialties on file
3
What do these letters mean?
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

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Practice location Address checks out

18951 N Memorial Dr
Humble, TX 77338-4217
Phone: (281) 540-7999
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence AP124663 (TX)
Nurse Practitioner Taxonomy 363L00000X · Licence AP124663 (TX)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 809797 (TX)

Record details

NPI number1669800546
Entity typeIndividual (Type 1)
GenderMale
Credentials FNP-C
Sole proprietorNo
NPI enumeratedOctober 31, 2013
Last updated in NPPESSeptember 17, 2024
Certification dateSeptember 17, 2024

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Memorial Hermann Hospital Based Physician Group — 269 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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