DR. LEONARD LOIS CALO MD
NPI 1033305545
Hospitalist in New Haven, CT
About Dr. Leonard Lois Calo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LEONARD LOIS CALO MD (NPI 1033305545) is an individual hospitalist provider in New Haven, Connecticut, licensed in Connecticut (045289) and active in the NPI registry since September 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2004).
NPPES Registry Identity
Specialties & Licenses 2
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. Leonard Lois Calo 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 Leonard Calo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New Haven, CT 06510
- Reassigned Medicare billing, Connecticut enrollment
- Medicare enrollment name: Northeast Medical Group Inc
- 1,824 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 06504 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 06504
NEW HAVEN, CT 06504
NEW HAVEN, CT 06504
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 Leonard Calo's NPI number?
The NPI number for Leonard Calo is 1033305545. It was assigned to this individual provider in the NPPES registry on September 18, 2007.
Where is Leonard Calo located?
Leonard Calo practices at 20 York St Ynh Medical Services PC - Cb 2041, New Haven, CT 06504. The listed phone number is (203) 688-4748.
What is Leonard Calo's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Leonard Calo enrolled in Medicare?
Yes. Leonard Calo 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 Leonard Calo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leonard Calo reassigns Medicare benefits to Mill Hill Medical Consultants Inc (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 Leonard Calo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Leonard Calo accept?
Health plans from Anthem Blue Cross and Blue Shield list Leonard Calo 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 Leonard Calo was last updated on January 6, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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. Leonard Lois Calo, MD · NPI 1033305545
Hospitalist physician in New Haven, Connecticut. Individual provider, active in the CMS NPPES registry since September 18, 2007.
## Identity
- **NPI:** 1033305545 (Entity type: Individual)
- **Enumerated:** September 18, 2007
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 045289 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 20 YORK ST, YNH MEDICAL SERVICES PC - CB 2041, New Haven, CT 06504-8900
- **Phone:** (203) 688-4748 · **Fax:** (203) 688-4740
## 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:** Mill Hill Medical Consultants Inc (NPI 1952624769, New Haven, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2004
## Record status
- **NPPES last updated:** January 6, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1033305545) · Data from the CMS NPPES public registry.