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

Abigail Nisan, MD

Individual provider Internal Medicine Physician · NPI 1336445956

Abigail Nisan, MD is an Internal Medicine in San Angelo, Texas. Qualified in 2008, 18 years ago. Practices with Shannon Clinic, a 547-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
18
Licensed in
TX
In the registry since
2011
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

120 E Harris Ave
San Angelo, TX 76903-5904
Phone: (325) 653-6741
Fax: (325) 481-2166
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence P1676 (TX)

Record details

NPI number1336445956
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 28, 2011
Last updated in NPPESJanuary 22, 2015

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Shannon Clinic — 547 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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