DR. RONALD A. ZLOTOFF M.D.
NPI 1346229556
Internal Medicine - Gastroenterology in Waterbury, CT
About Dr. Ronald A. Zlotoff M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RONALD A. ZLOTOFF M.D. (NPI 1346229556) is an individual gastroenterology provider in Waterbury, Connecticut, licensed in Connecticut (20649) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Oklahoma College Of Medicine (1977).
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. Ronald A. Zlotoff M.d. 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 Reassignments
2Medicare enrollment records show Ronald Zlotoff reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Wallingford, CT 06492
- Reassigned Medicare billing, Connecticut enrollment
- 84 clinicians in this Medicare group
Hartford, CT 06105
- Reassigned Medicare billing, Connecticut enrollment
- 1,186 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 06708 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.
Reported Quality Measures
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.
WATERBURY, CT 06708
WATERBURY, CT 06708
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 Ronald Zlotoff's NPI number?
The NPI number for Ronald Zlotoff is 1346229556. It was assigned to this individual provider in the NPPES registry on January 16, 2006.
Where is Ronald Zlotoff located?
Ronald Zlotoff practices at 140 Grandview Ave Suite 4, Waterbury, CT 06708. The listed phone number is (203) 755-4515.
What is Ronald Zlotoff's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Ronald Zlotoff enrolled in Medicare?
Yes. Ronald Zlotoff 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 organizations bill Medicare for Ronald Zlotoff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ronald Zlotoff reassigns Medicare benefits to 2 organizations: Gaylord Hospital, Inc. (Wallingford, CT) and Trinity Health Of New England Provider Network Organization Inc (Hartford, CT). Each 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 Ronald Zlotoff'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 Ronald Zlotoff was last updated on October 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Ronald A. Zlotoff, M.D. · NPI 1346229556
Gastroenterology physician in Waterbury, Connecticut. Individual provider, active in the CMS NPPES registry since January 16, 2006.
## Identity
- **NPI:** 1346229556 (Entity type: Individual)
- **Enumerated:** January 16, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 20649 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 140 GRANDVIEW AVE, SUITE 4, Waterbury, CT 06708-2505
- **Phone:** (203) 755-4515 · **Fax:** (203) 755-8129
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Gaylord Hospital, Inc. (NPI 1730137753, Wallingford, CT); Trinity Health Of New England Provider Network Organization Inc (NPI 1003882812, Hartford, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Oklahoma College Of Medicine, class of 1977
## Record status
- **NPPES last updated:** October 29, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1346229556) · Data from the CMS NPPES public registry.