Robert Steven Wallis, M.D.
Infectious Disease Physician · Old Lyme, CT
Robert Steven Wallis, M.D. is an infectious disease physician with a practice address in Old Lyme, Connecticut, and NPI 1154555738, issued on May 11, 2009. Check the license (Connecticut 49370, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Robert Steven Wallis
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- 49370 CT
MD037184 DC
25MA07059900 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 55 Saunders Hollow RD, Old Lyme, CT 06371
- Phone
- (860) 598-9160
- Enumerated
- May 11, 2009
- Record last updated
- Aug 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 202 in Connecticut → Look up another NPI →
Verify Robert Steven Wallis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 49370Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average infectious disease physician in 2024
13 Medicare Part D claims, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Robert Steven Wallis among 202 infectious disease physician records in Connecticut
Robert Steven Wallis, M.D. is one of 202 infectious disease physician records with a practice address in Connecticut. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 34% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2021 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Connecticut
There are 202 infectious disease physician records in Connecticut.
All 202 in Connecticut → Every provider in Old Lyme → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Patrick Cahill, M.D.Norwich, CT 063601578884698
- Manish Doshi, M.D.Norwich, CT 063601336302314
- Sean Harford, MDNorwich, CT 063601922663889
- Sir Cedric Abraham Ibanez, M.D.Norwich, CT 063601841496452
- Suchita Kumar, M.D.Norwich, CT 063601376830091
- Eufronio Maderazo, MDNorwich, CT 063601639156151
- Uchenna Okereke, M.D.Norwich, CT 063601437566205
- Michael Rajkumar, MDNorwich, CT 063601689651143
Common questions
What is Robert Steven Wallis, M.D.'s NPI number?
Robert Steven Wallis, M.D.'s National Provider Identifier (NPI) is 1154555738, issued on May 11, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Robert Steven Wallis, M.D. located?
The NPPES record lists a practice address at 55 Saunders Hollow RD, Old Lyme, CT, 06371. Phone: (860) 598-9160. Providers update this record themselves, so call before visiting.
How can I verify Robert Steven Wallis, M.D.'s license?
NPPES lists Connecticut license number 49370, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Steven Wallis, M.D. prescribe under Medicare Part D?
In 2024, Robert Steven Wallis, M.D. had 13 Medicare Part D claims; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.