DR. DIANE S MORGENTHALER MD
NPI 1578708111
Internal Medicine in Ledyard, CT
About Dr. Diane S Morgenthaler Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIANE S MORGENTHALER MD (NPI 1578708111) is an individual internal medicine provider in Ledyard, Connecticut, licensed in Connecticut (033164) and active in the NPI registry since December 2008. She is enrolled in Medicare PECOS and is a graduate of Medical College Of Pennsylvania (1988).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Diane S Morgenthaler Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Diane Morgenthaler reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Ledyard, CT 06339
- Reassigned Medicare billing, Texas enrollment
- 5 clinicians in this Medicare group
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 06339 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Diane Morgenthaler's NPI number?
The NPI number for Diane Morgenthaler is 1578708111. It was assigned to this individual provider in the NPPES registry on December 11, 2008.
Where is Diane Morgenthaler located?
Diane Morgenthaler practices at 75 Norwich Westerly Rd, Ledyard, CT 06339. The listed phone number is (860) 312-8000.
What is Diane Morgenthaler's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Diane Morgenthaler enrolled in Medicare?
Yes. Diane Morgenthaler is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Diane Morgenthaler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diane Morgenthaler reassigns Medicare benefits to Mashantucket Pequot Tribal Council (Ledyard, 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 Diane Morgenthaler'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 Diane Morgenthaler was last updated on January 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months 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.
# Dr. Diane S Morgenthaler, MD · NPI 1578708111
Internal Medicine physician in Ledyard, Connecticut. Individual provider, active in the CMS NPPES registry since December 11, 2008.
## Identity
- **NPI:** 1578708111 (Entity type: Individual)
- **Enumerated:** December 11, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 033164 (Connecticut)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 75 NORWICH WESTERLY RD, Ledyard, CT 06339-1128
- **Phone:** (860) 312-8000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mashantucket Pequot Tribal Council (NPI 1508140922, Ledyard, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Pennsylvania, class of 1988
## Record status
- **NPPES last updated:** January 16, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1578708111) · Data from the CMS NPPES public registry.