Adam Messenger, M.D.
Hospitalist Physician · Cos Cob, CT
Adam Messenger, M.D. is a hospitalist physician with a practice address in Cos Cob, Connecticut, and NPI 1447471784, issued on May 2, 2007. Check the license (Connecticut 045186, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Adam Messenger
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 045186 CT
Self-reported in NPPES; status is on the state search - Practice location
- 31 River RD, Cos Cob, CT 06807
- Phone
- (203) 661-9433
- Enumerated
- May 2, 2007
- Record last updated
- Nov 5, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 31 River RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amy Barber, PTPhysical Therapist1316480361
- Nicole Delage, ATCAthletic Trainer1902157480
- Donna Hagberg, M.D.Specialist1578691465
- Christine Lynders, PTPhysical Therapist1134406457
- Bruce Molinelli, M.D.Surgery Physician1083788202
- Monica Sheppard, PAMedical Physician Assistant1992038962
Verify Adam Messenger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 045186Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average hospitalist physician in 2024
35 Medicare Part D claims for 22 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Lidocaine-Prilocaine16 claims
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.
The MIPS final score for 2023 (Medicare payment program): 94.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $24.02
1 payment: food and beverage; the largest payer was Abbvie Inc. The 7,324 providers of this specialty with any payment received $494.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Hospitalist Physician providers in Connecticut
There are 400 hospitalist physician records in Connecticut.
Other hospitalist physician records in Connecticut
- Mahmoud AbdelhadiBridgeport, CT1376116574
- Mahmoud Abdelrahman, MDBridgeport, CT1467072868
- Simon Abi-SalehBridgeport, CT1891315529
- Adam Ackerman, MDNew Haven, CT1497982235
- Kalvin Adala, MDDanbury, CT1114370186
- Nana Addo, M.DNorwalk, CT1538789052
- Evelyn Adekolu, M.D.New Haven, CT1942595855
- Santosh Adhikari, MDHartford, CT1487331450
- Edin AdilovicBridgeport, CT1962993592
- Anisha AdvaniNew Haven, CT1881836799
Common questions
What is Adam Messenger, M.D.'s NPI number?
Adam Messenger, M.D.'s National Provider Identifier (NPI) is 1447471784, issued on May 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Adam Messenger, M.D. located?
The NPPES record lists a practice address at 31 River RD, Cos Cob, CT, 06807. Phone: (203) 661-9433. Providers update this record themselves, so call before visiting.
How can I verify Adam Messenger, M.D.'s license?
NPPES lists Connecticut license number 045186, 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 Adam Messenger, M.D. prescribe under Medicare Part D?
In 2024, Adam Messenger, M.D. had 35 Medicare Part D claims for 22 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Adam Messenger, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.