1. Home
  2. Directory
  3. New York
  4. New York New York
  5. Internal Medicine
  6. NPI Profile

DR. CAROLINE KORSTEN MESSER MD
NPI 1386855047
Internal Medicine - Endocrinology, Diabetes & Metabolism in New York, NY

Active since May 24, 2007Opted out of Medicare · through Apr 1, 2027
110 E 60TH ST RM 802, NEW YORK, NY 10022(646) 760-3256(646) 974-9714 Get Directions Write a Review

NPPES record last updated: June 17, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Caroline Korsten Messer Md NPPES

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

DR. CAROLINE KORSTEN MESSER MD (NPI 1386855047) is an individual endocrinology, diabetes & metabolism provider in New York, New York, licensed in New York (242804) and active in the NPI registry since May 2007. She has opted out of Medicare through April 1, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1386855047
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameDR. CAROLINE KORSTEN MESSERCredential: MD
Location Address110 E 60TH ST RM 802New York, NY 10022-1795
Mailing Address110 E 60th St Rm 802New York, NY 10022-1795 · (646) 760-3256 · Fax (646) 974-9714
Phone(646) 760-3256
Fax(646) 974-9714
Sole ProprietorYes
Enumeration DateMay 24, 2007
Last NPPES UpdateJune 17, 2026
NPPES CertifiedJune 17, 2026
✔ NPI 1386855047 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in NY · 242804
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedInternal MedicineTaxonomy 207R00000X · License 242804 (NY)
110 E 60TH ST RM 802, New York, NY 10022
Open in Google Maps ↗

Other Identifiers 2

OtherA400029375NY · Medicare Ptan
Medicaid03184636NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Caroline Korsten Messer Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 1, 2017 through April 1, 2027.

Opt-Out Effective DateApril 1, 2017
Opt-Out In Effect ThroughApril 1, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10022 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
$150.24 typical visit price
range $65.69 – $198.19
Typical copayment $37.56 (range $16.42 – $49.54)
Most-billed visit code 99204
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
9 suppliers18 claims69 services$6.40 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
7 suppliers74 claims74 services$192.52 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

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

DR. ANDREW G MOAWAD MD
Internal Medicine
110 E 60TH ST RM 802
NEW YORK, NY 10022
New York County (646) 760-3256
CKM MEDICAL PLLC
Clinic/Center (Multi-Specialty)
110 E 60TH ST RM 802
NEW YORK, NY 10022
New York County (646) 760-3256

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 Caroline Messer's NPI number?

The NPI number for Caroline Messer is 1386855047. It was assigned to this individual provider in the NPPES registry on May 24, 2007.

Where is Caroline Messer located?

Caroline Messer practices at 110 E 60th St Rm 802, New York, NY 10022. The listed phone number is (646) 760-3256.

What is Caroline Messer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Caroline Messer enrolled in Medicare?

No. Caroline Messer has opted out of Medicare through April 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Caroline Messer was last updated on June 17, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.