Dr. Alex Leaman Thomas Clos, MD
- Part D claims, 2024
- 114
- Hospital affiliations
- 3
- Industry payments
- $600
- Medical groups
- 4
- State license
- 1
- Practice address
- 1 General St, Lawrence, MA 01841
- Practice phone
- Call (978) 683-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Merrimack Health Lawrence Hospital
Lawrence, Massachusetts
Find Dr. Clos' 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. Alex Leaman Thomas Clos is an emergency medicine physician in Lawrence, Massachusetts
Dr. Clos practices at Merrimack Health Lawrence Hospital in Lawrence, Massachusetts.
Dr. Clos' NPI, 1578149506, was assigned on March 21, 2021. Dr. Clos holds Massachusetts license 1019264.
- NPI
- 1578149506NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759785298
- NPI enumeration date
- March 21, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 683-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alex Leaman Thomas Clos practices at Merrimack Health Lawrence Hospital in Lawrence, Massachusetts
Dr. Clos' primary practice is Merrimack Health Lawrence Hospital, at 1 General St, Lawrence, MA 01841 in Essex County. The practice phone is (978) 683-4000.
- Merrimack Health Lawrence Hospital1 General St, Lawrence, MA 01841 · Essex CountyPhone(978) 683-4000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Alex Leaman Thomas Clos is affiliated with 4 sites of care and 4 medical groups
Dr. Clos' primary practice is Merrimack Health Lawrence Hospital in Lawrence, Massachusetts. Dr. Clos is also affiliated with Merrimack Health Lawrence Hospital. The medical group on file is Merrimack Health Community Medical Associates (CMA). Dmand AI also links Dr. Clos to 2 more hospitals and 3 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alex Leaman Thomas Clos' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clos practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Merrimack Health Lawrence Hospital | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alex Leaman Thomas Clos is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Clos' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Clos is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Clos
Counts of emergency medicine physicians 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. Alex Leaman Thomas Clos' patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Clos' median patient age at 63, with 55% women.
Dr. Clos' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women55%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. Alex Leaman Thomas Clos wrote 114 Medicare Part D claims in 2024
In 2024, Dr. Clos wrote 114 Medicare Part D claims for 74 patients. 92% of them were for generic drugs. CMS names the drug for 26 of them, across 1 drug with 11 or more claims each, at $153 in total drug cost.
Dr. Clos' Part D claims by kind of drug, 2024
- Generic105 claims92%
- Brand-name and other9 claims8%
Dr. Clos' 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. Clos' Part D claims, 2024
- Antibiotics24%27 of 114 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. Alex Leaman Thomas Clos takes part in Medicare
Dr. Clos 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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Dr. Alex Leaman Thomas Clos received $600 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Clos from 1 drug or device company in 2025. Consulting fees make up the largest share, 100% of the total. Anumana, Inc. paid the most, $600.
Companies that paid Dr. Clos the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Alex Leaman Thomas Clos'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| Industry payments | Open Payments (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. Alex Leaman Thomas Clos
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. Alex Leaman Thomas Clos' NPI number?
Dr. Alex Leaman Thomas Clos' NPI number is 1578149506. It was assigned on March 21, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Alex Leaman Thomas Clos?
Dr. Alex Leaman Thomas Clos is an emergency medicine physician in Lawrence, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Alex Leaman Thomas Clos practice?
Dr. Clos practices at 1 General St, Lawrence, MA 01841. Dr. Clos' primary practice is Merrimack Health Lawrence Hospital in Lawrence, Massachusetts. Dmand AI also links Dr. Clos to 2 hospitals and 3 medical groups.
What is Dr. Alex Leaman Thomas Clos' office phone number?
The practice phone on file for Dr. Clos is (978) 683-4000.
What is Dr. Alex Leaman Thomas Clos' medical license number?
Dr. Clos holds Massachusetts license 1019264.
Which hospitals is Dr. Alex Leaman Thomas Clos affiliated with?
Dr. Clos is affiliated with Merrimack Health Lawrence Hospital. Dmand AI links Dr. Clos to 2 more hospitals.
What medical group is Dr. Alex Leaman Thomas Clos part of?
Dr. Clos is linked to Merrimack Health Community Medical Associates (CMA). Dmand AI links Dr. Clos to 3 more medical groups.
Does Dr. Alex Leaman Thomas Clos accept Medicare?
Yes. CMS lists Dr. Clos as accepting Medicare assignment.
What drugs does Dr. Alex Leaman Thomas Clos prescribe most?
In 2024 Medicare Part D data, Dr. Clos' most prescribed drugs by claims were Ibuprofen.
Has Dr. Alex Leaman Thomas Clos received payments from drug or device companies?
CMS Open Payments shows $600 in general payments to Dr. Clos from 1 company from 2025 to 2025. The largest total came from Anumana, Inc.
How long has Dr. Alex Leaman Thomas Clos been practicing?
Dr. Clos graduated from medical school in 2021, 5 years ago.
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