Adam Messenger, M.D.
Internal Medicine Physician · Cos Cob, CT
Adam Messenger, M.D. is an internal medicine 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
- Internal Medicine Physician 207R00000X
- 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
- 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
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
35 Medicare Part D claims for 22 beneficiaries, against an average of 2,785 among the 127,794 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 Medicare quality score for 2023: 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, mostly food and beverage; the largest payer was Abbvie Inc.. The 65,274 providers of this specialty with any payment received $2,536.66 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.
6 internal medicine physician records list a Cos Cob practice address
They are 6 of the 125 NPPES records with a Cos Cob practice address, and 2,830 internal medicine physician records in Connecticut.
All 6 in Cos Cob → All 2,830 in Connecticut → Every provider in Cos Cob →
Other internal medicine physician records in Connecticut
- Christina AbavanaBridgeport, CT1508206574
- Hoda Abdel Salam, M.D.New Britain, CT1144509316
- Gada Abdelhafiz, MDNew London, CT1467649558
- Mahmoud Abdelrahman, MDBridgeport, CT1467072868
- Simon Abi-SalehBridgeport, CT1891315529
- Gerard Abidor, D.O.Bridgeport, CT1518014539
- Richard Abraham, M.D.Canton, CT1023044252
- Odaliz Abreu-Lanfranco, MDNew Haven, CT1538276134
- Nila Aburto, MDStamford, CT1396325718
- Angelo Accomando, M.D.East Haven, CT1063454247
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 internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is Adam Messenger, M.D.'s Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.