William Leach, MD
Infectious Disease Physician · Manchester, CT
William Leach, MD is an infectious disease physician with a practice address in Manchester, Connecticut, and NPI 1114546785, issued on Apr 13, 2020. Check the license (Connecticut 82262, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William Leach
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 82262 CT
Self-reported in NPPES; status is on the state search - Practice location
- 18 Haynes St FL 2, Manchester, CT 06040
- Phone
- (860) 874-9372
- Enumerated
- Apr 13, 2020
- Record last updated
- Jun 27, 2025
- Medicare enrollment
- Enrolled (PECOS I20250809000386); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 202 in Connecticut → Look up another NPI →
Verify William Leach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 82262Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average infectious disease physician in 2024
110 Medicare Part D claims for 34 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Biktarvy26 claims
- Odefsey20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Prospect CT Medical Foundation IncManchester, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Leach among 202 infectious disease physician records in Connecticut
William Leach, MD is one of 202 infectious disease physician records with a practice address in Connecticut. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 95% of them.
- NPI issued2020 · 95% of these records are older, 1% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2019 · median 2003 among the 136 with a school on file
- Record last updated2025 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Connecticut
There are 202 infectious disease physician records in Connecticut.
All 202 in Connecticut → Every provider in Manchester → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Alejandro Murcia, M.D.Manchester, CT 060401114987377
- Eugene Ciccone, M.D.Kensington, CT 060371437114030
- Edward Blanchette, M.D.Glastonbury, CT 060331306001508
- Jacqueline Muschiano, APRNGlastonbury, CT 060331588633887
- David Fraulino, D.O.Farmington, CT 060321427584192
- David Banach, MDFarmington, CT 060301639380256
- Sarah Banks, M.D.Farmington, CT 060301689094047
- Casey Godshall, M.D.Farmington, CT 060301588958227
Common questions
What is William Leach, MD's NPI number?
William Leach, MD's National Provider Identifier (NPI) is 1114546785, issued on Apr 13, 2020. An NPI identifies a provider in billing; it is not a license.
Where is William Leach, MD located?
The NPPES record lists a practice address at 18 Haynes St FL 2, Manchester, CT, 06040. Phone: (860) 874-9372. Providers update this record themselves, so call before visiting.
How can I verify William Leach, MD's license?
NPPES lists Connecticut license number 82262, 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.
How much does William Leach, MD prescribe under Medicare Part D?
In 2024, William Leach, MD had 110 Medicare Part D claims for 34 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
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.