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

Dr. Sinclair W Armstrong Jr., MD

Individual provider Urology Physician · NPI 1861435752

Dr. Sinclair W Armstrong Jr., MD is an Urology Physician in Fort Smith, Arkansas. Licensed in Arkansas. Registered with an NPI since 2006.

Licensed in
AR
In the registry since
2006
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

7001 Rogers Ave
Fort Smith, AR 72903-4073
Phone: (479) 452-2077
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Urology Physician (primary) Taxonomy 208800000X · Licence R-2359 (AR)

Record details

NPI number1861435752
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 14, 2006
Last updated in NPPESJuly 8, 2007
Mailing addressPo Box 3528, Fort Smith, AR 72913-3528

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