DR. MERCEDITAS S VILLANUEVA MD
NPI 1518930221
Internal Medicine - Infectious Disease in New Haven, CT
About Dr. Merceditas S Villanueva Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MERCEDITAS S VILLANUEVA MD (NPI 1518930221) is an individual infectious disease provider in New Haven, Connecticut, licensed in Connecticut (029263) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS and is a graduate of Washington University School Of Medicine (1985).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
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. Merceditas S Villanueva 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 Merceditas Villanueva reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New Haven, CT 06519
- Reassigned Medicare billing, Connecticut enrollment
- 3,728 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06510 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW HAVEN, CT 06510
NEW HAVEN, CT 06510
NEW HAVEN, CT 06510
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 Merceditas Villanueva's NPI number?
The NPI number for Merceditas Villanueva is 1518930221. It was assigned to this individual provider in the NPPES registry on February 12, 2006.
Where is Merceditas Villanueva located?
Merceditas Villanueva practices at 20 York St, New Haven, CT 06510. The listed phone number is (203) 688-5303.
What is Merceditas Villanueva's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Merceditas Villanueva enrolled in Medicare?
Yes. Merceditas Villanueva 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 Merceditas Villanueva's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Merceditas Villanueva reassigns Medicare benefits to Yale University (New Haven, 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 Merceditas Villanueva's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Merceditas Villanueva accept?
Health plans from Anthem Blue Cross and Blue Shield list Merceditas Villanueva as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Merceditas Villanueva was last updated on November 20, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Dr. Merceditas S Villanueva, MD · NPI 1518930221
Infectious Disease physician in New Haven, Connecticut. Individual provider, active in the CMS NPPES registry since February 12, 2006.
## Identity
- **NPI:** 1518930221 (Entity type: Individual)
- **Enumerated:** February 12, 2006
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 029263 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 20 YORK ST, New Haven, CT 06510-3220
- **Phone:** (203) 688-5303
## 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:** Yale University (NPI 1124148887, New Haven, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 1985
## Record status
- **NPPES last updated:** November 20, 2009
- **Other identifiers:** Medicaid 001292630 (CT); Medicare UPIN E55219; Medicare ID-Type Unspecified 440000116 (CT)
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Source: [NPI Profile](https://npiprofile.com/npi/1518930221) · Data from the CMS NPPES public registry.