Leonard Lois Calo, MD
Hospitalist Physician · New Haven, CT
Leonard Lois Calo, MD is a hospitalist physician with a practice address in New Haven, Connecticut, and NPI 1033305545, issued on Sep 18, 2007. Check the license (Connecticut 045289, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Leonard Lois Calo
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 045289 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 York St, New Haven, CT 06504
- Phone
- (203) 688-4748
- Enumerated
- Sep 18, 2007
- Record last updated
- Jan 6, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (203) 688-4740
- Medicare enrollment
- Enrolled (PECOS I20080627000034); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 400 in Connecticut → Look up another NPI →
Also registered at 20 York St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Leonard Lois Calo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 045289Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 93.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Northeast Medical Group IncNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leonard Lois Calo among 400 hospitalist physician records in Connecticut
Leonard Lois Calo, MD is one of 400 hospitalist physician records with a practice address in Connecticut. 94% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 16% of them.
- NPI issued2007 · 16% of these records are older, 77% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2004 · median 2011 among the 332 with a school on file
- Record last updated2015 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
171 hospitalist physician records list a practice address in New Haven
They are 171 of the 9,793 NPPES records with a practice address in New Haven, and 400 hospitalist physician records in Connecticut.
All 400 in Connecticut → Every provider in New Haven → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Lirim Ameti, M.D.New Haven, CT 065041316009608
- Senai Asefaw, M.D.New Haven, CT 065041801939343
- Arina Cadariu, M.D.New Haven, CT 065041922141969
- Kerstin Calia, MDNew Haven, CT 065041386627503
- Christine Chen, M.D.New Haven, CT 065041134189707
- Edward Francois, M.D.New Haven, CT 065041598761546
- Olutayo Imevbore, M.D.New Haven, CT 065041750447421
- Jensa Morris, M.D.New Haven, CT 065041508928797
Common questions
What is Leonard Lois Calo, MD's NPI number?
Leonard Lois Calo, MD's National Provider Identifier (NPI) is 1033305545, issued on Sep 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Lois Calo, MD located?
The NPPES record lists a practice address at 20 York St, New Haven, CT, 06504. Phone: (203) 688-4748. Providers update this record themselves, so call before visiting.
How can I verify Leonard Lois Calo, MD's license?
NPPES lists Connecticut license number 045289, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Leonard Lois Calo, MD's MIPS final score?
The 2023 MIPS final score is 93.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.