Dr. William Leach, MD
- Part D claims, 2024
- 110
- Hospital affiliations
- 2
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2020
- Practice address
- 71 Haynes St, Manchester, CT 06040
- Practice phone
- Call (860) 647-4780
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Leach's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William Leach is an infectious disease specialist in Manchester, Connecticut
Dr. Leach practices at Manchester Memorial Hospital in Manchester, Connecticut, part of Hartford HealthCare.
Dr. Leach's NPI, 1114546785, was assigned on April 13, 2020. Dr. Leach holds Connecticut license 82262.
- NPI
- 1114546785NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173021128
- NPI enumeration date
- April 13, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (860) 647-4780
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Leach practices at Manchester Memorial Hospital in Manchester, Connecticut
Dr. Leach's primary practice is Manchester Memorial Hospital, at 71 Haynes St, Manchester, CT 06040 in Hartford County. The practice phone is (860) 647-4780.
- Manchester Memorial Hospital71 Haynes St, Manchester, CT 06040 · Hartford CountyPhone(860) 647-4780
Source: Dmand AI Affiliation Data
Dr. William Leach is affiliated with 4 sites of care and 2 medical groups
Dr. Leach's primary practice is Manchester Memorial Hospital in Manchester, Connecticut, part of Hartford HealthCare. Dr. Leach is also affiliated with Hartford Hospital. The medical group on file is Hartford HealthCare Medical Group Specialists. Dmand AI also links Dr. Leach to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Leach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leach practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Manchester Memorial Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Leach is one of 168 infectious disease specialists in Connecticut
Infectious disease is Dr. Leach's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Leach is licensed in Connecticut.
Specialties and state licenses
- Infectious disease, ConnecticutPrimary
Infectious disease specialists near Dr. Leach
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Leach's patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Leach's median patient age at 62, with 49% women.
Dr. Leach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women49%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. William Leach wrote 110 Medicare Part D claims in 2024
In 2024, Dr. Leach wrote 110 Medicare Part D claims for 34 patients. 45% of them were for generic drugs. CMS names the drug for 46 of them, across 2 drugs with 11 or more claims each, at $165,479 in total drug cost.
Dr. Leach's Part D claims by kind of drug, 2024
- Generic50 claims45%
- Brand-name60 claims55%
Dr. Leach's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Leach's Part D claims, 2024
- Antibiotics31%34 of 110 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. William Leach takes part in Medicare
Dr. Leach accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Dr. William Leach's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Leach
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Leach's NPI number?
Dr. William Leach's NPI number is 1114546785. It was assigned on April 13, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. William Leach?
Dr. William Leach is an infectious disease specialist in Manchester, Connecticut. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. William Leach practice?
Dr. Leach practices at 71 Haynes St, Manchester, CT 06040. Dr. Leach's primary practice is Manchester Memorial Hospital in Manchester, Connecticut, part of Hartford HealthCare. Dmand AI also links Dr. Leach to 2 group practices and clinics and 1 medical group.
What is Dr. William Leach's office phone number?
The practice phone on file for Dr. Leach is (860) 647-4780.
What is Dr. William Leach's medical license number?
Dr. Leach holds Connecticut license 82262, one of 2 state licenses on file.
Which hospitals is Dr. William Leach affiliated with?
Dr. Leach practices at Manchester Memorial Hospital in Manchester, Connecticut. Dr. Leach is also affiliated with Hartford Hospital.
What medical group is Dr. William Leach part of?
Dr. Leach is linked to Hartford HealthCare Medical Group Specialists. Dmand AI links Dr. Leach to 1 more medical group.
Does Dr. William Leach accept Medicare?
Yes. CMS lists Dr. Leach as accepting Medicare assignment.
What drugs does Dr. William Leach prescribe most?
In 2024 Medicare Part D data, Dr. Leach's most prescribed drugs by claims were Biktarvy and Odefsey.
How long has Dr. William Leach been practicing?
Dr. Leach graduated from medical school in 2019, 7 years ago.
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