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

Dr. Robert Steven Wallis, MD

Individual provider Infectious Disease Physician · NPI 1154555738

Dr. Robert Steven Wallis, MD is an Infectious Disease Physician in Old Lyme, Connecticut. Licensed in Connecticut, District of Columbia and New Jersey. Registered with an NPI since 2009.

Licensed in
CT, DC, NJ
In the registry since
2009
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

55 Saunders Hollow Rd
Old Lyme, CT 06371-1127
Phone: (860) 598-9160
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 49370 (CT)
Infectious Disease Physician Taxonomy 207RI0200X · Licence MD037184 (DC)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 25MA07059900 (NJ)

Record details

NPI number1154555738
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 11, 2009
Last updated in NPPESAugust 10, 2021
Certification dateAugust 10, 2021
Mailing address55 Saunders Hollow Rd, Old Lyme, CT 06371-1127