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ADAM MESSENGER M.D.
NPI 1447471784
Hospitalist in Cos Cob, CT

Active since May 02, 2007PECOS Enrolled
94.17/100
CMS Quality Rating
31 RIVER RD, 200, COS COB, CT 06807(203) 661-9433 Get Directions Write a Review

NPPES record last updated: November 5, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Adam Messenger M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ADAM MESSENGER M.D. (NPI 1447471784) is an individual hospitalist provider in Cos Cob, Connecticut, licensed in Connecticut (045186) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1447471784
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameADAM MESSENGERCredential: M.D.
Location Address31 RIVER RD, 200Cos Cob, CT 06807-2152
Mailing Address121 Pilgrim DrGreenwich, CT 06831-4941 · (914) 433-0633
Phone(203) 661-9433
Sole ProprietorYes
Enumeration DateMay 2, 2007
Last NPPES UpdateNovember 5, 2015
✔ NPI 1447471784 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in CT · 045186
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License 045186 (CT)
31 RIVER RD, Cos Cob, CT 06807
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Adam Messenger M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Adam Messenger reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Glenville Medical Associates P.C
4.9 mi
Internal Medicine
7 RIVERSVILLE RD
Greenwich, CT 06831
  • Reassigned Medicare billing, Connecticut enrollment
  • 8 clinicians in this Medicare group
NPI 1982826574 (203) 531-1808

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06807 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.17/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality81.94
Promoting Interoperability99.39
Improvement Activities40

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
4%51 patients1/55-star benchmark: 100%
Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
15%106 patients1/55-star benchmark: 85%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
90%444 patients3/55-star benchmark: 99%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
85%46 patients2/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
44%206 patients2/55-star benchmark: 97%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
30%204 patients2/55-star benchmark: 97%
Preventive Care and Screening: Influenza Immunization
Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization
20%148 patients1/55-star benchmark: 88%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
37%206 patients2/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
3%206 patients1/55-star benchmark: 89%
View, Download, or Transmit (VDT)
At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.
14%206 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. BRUCE MOLINELLI M.D.
Surgery
31 RIVER RD, SUITE 102
COS COB, CT 06807
Western Connecticut Planning Region (203) 742-1173
PLANCHER ORTHOPAEDICS,PLLC
Specialist
31 RIVER RD
COS COB, CT 06807
Western Connecticut Planning Region (203) 863-2003
CHRISTINE J LYNDERS PT
Physical Therapist
31 RIVER RD
COS COB, CT 06807
Western Connecticut Planning Region (203) 769-1781
AMY BARBER PT
Physical Therapist
31 RIVER RD
COS COB, CT 06807
Western Connecticut Planning Region (203) 769-1781
PLANCHER ORTHOPAEDICS II,PLLC
Orthopaedic Surgery
31 RIVER RD
COS COB, CT 06807
Western Connecticut Planning Region (203) 863-2003
WALSH-BRUNETTI LLC
Internal Medicine
31 RIVER RD, SUITE 200
COS COB, CT 06807
Western Connecticut Planning Region (203) 661-9433
DR. DONNA JOAN HAGBERG M.D.
Specialist
31 RIVER RD, SUITE 102
COS COB, CT 06807
Western Connecticut Planning Region (203) 742-1150
PLANCHER ORTHOPAEDICS & SPORTS MEDICINE,PLLC
Orthopaedic Surgery
31 RIVER RD, SUITE 100
COS COB, CT 06807
Western Connecticut Planning Region (203) 863-2003

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Adam Messenger's NPI number?

The NPI number for Adam Messenger is 1447471784. It was assigned to this individual provider in the NPPES registry on May 2, 2007.

Where is Adam Messenger located?

Adam Messenger practices at 31 River Rd 200, Cos Cob, CT 06807. The listed phone number is (203) 661-9433.

What is Adam Messenger's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Adam Messenger enrolled in Medicare?

Yes. Adam Messenger is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Adam Messenger's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Adam Messenger reassigns Medicare benefits to Glenville Medical Associates P.C (Greenwich, CT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Adam Messenger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Adam Messenger was last updated on November 5, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.