Dr. Patrick Leong, DO
- Medicare services, 2024
- 699
- Medicare patients, 2024
- 156
- Part D claims, 2024
- 839
- Hospital affiliations
- 5
- Industry payments
- $15
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Leong'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. Patrick Leong is an internist in Boston, Massachusetts
Dr. Leong practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Leong's NPI, 1447237003, was assigned on December 27, 2005. Dr. Leong holds Massachusetts license 151924.
- NPI
- 1447237003NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103843057
- NPI enumeration date
- December 27, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Patrick Leong practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Leong's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Patrick Leong is affiliated with 8 sites of care and 4 medical groups
Dr. Leong's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Leong is also affiliated with Brigham and Women's Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Leong to 3 more hospitals, 3 medical groups, 1 community health center, 1 group practice or clinic and 1 home health agency, 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. Patrick Leong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leong practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +7 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Patrick Leong is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Leong's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Leong's licenses on file in 2 states: Massachusetts and New Hampshire.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
- Family medicine, New Hampshire
Internists near Dr. Leong
Counts of internists 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. Patrick Leong billed Medicare for 699 services in 2024
CMS data shows 699 Medicare services from Dr. Leong across 15 procedure codes in 2024, for 156 Medicare patients. Medicare paid $52,284 for them. Every service was in an office.
Dr. Leong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2542024: 21814%
- Other services
- 2023: 302024: 207590%
- Surgery
- 2023: 532024: 152187%
- Tests and treatments
- 2023: 02024: 122
- Lab and pathology
- 2023: 672024: 0100%
Dr. Leong compared with the Massachusetts median for internists, 2024
- Dr. Leong
- Massachusetts median
- Medicare services
- 699vs 43162% above
- Medicare patients
- 156vs 19420% below
- Part D claims
- 532vs 40232% above
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Leong's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Patrick Leong treated 156 Medicare patients in 2024, average age 72
CMS counts 156 Medicare patients who saw Dr. Leong in 2024. The largest group is 65 to 74, with 84 patients. 72% of them have high cholesterol, and 65% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Leong's median patient age at 64, with 37% women.
Dr. Leong's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Leong's Medicare patients by sex, 2024
- Women6139%
- Men9561%
Chronic conditions among Dr. Leong's Medicare patients, 2024
- High cholesterol72%
- High blood pressure65%
- Arthritis38%
- Anxiety28%
- Ischemic heart disease27%
- Mood disorders26%
- Chronic kidney disease25%
- Depression24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women37%
- Men63%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Patrick Leong wrote 839 Medicare Part D claims in 2024
In 2024, Dr. Leong wrote 839 Medicare Part D claims for 169 patients. 86% of them were for generic drugs. CMS names the drug for 532 of them, across 20 drugs with 11 or more claims each, at $62,939 in total drug cost. In 2023, CMS named 758 claims across 26 drugs.
Dr. Leong's Part D claims by kind of drug, 2024
- Generic723 claims86%
- Brand-name and other116 claims14%
Dr. Leong'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. Leong's Part D claims, 2024
- Opioids4%34 of 839 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7582024: 53230%
Drugs named by CMS: 20 in 2024, 26 in 2023.
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
Dr. Patrick Leong offers telehealth to Medicare patients
Dr. Leong accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Leong as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Dr. Patrick Leong received $15 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Leong from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $15.
Companies that paid Dr. Leong the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Patrick Leong'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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. Patrick Leong
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. Patrick Leong's NPI number?
Dr. Patrick Leong's NPI number is 1447237003. It was assigned on December 27, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Patrick Leong?
Dr. Patrick Leong is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Patrick Leong practice?
Dr. Leong practices at 55 Fruit Street, Boston, MA 02114. Dr. Leong's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Leong to 3 hospitals, 3 medical groups, 1 community health center, 1 group practice or clinic and 1 home health agency.
What is Dr. Patrick Leong's office phone number?
The practice phone on file for Dr. Leong is (617) 726-2000.
What is Dr. Patrick Leong's medical license number?
Dr. Leong holds Massachusetts license 151924, one of the licenses on file in 2 states.
Which states has Dr. Patrick Leong been licensed in?
Dmand AI has state licenses on file for Dr. Leong in Massachusetts and New Hampshire.
Which hospitals is Dr. Patrick Leong affiliated with?
Dr. Leong practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Leong is also affiliated with Brigham and Women's Hospital. Dmand AI links Dr. Leong to 3 more hospitals.
What medical group is Dr. Patrick Leong part of?
Dr. Leong is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Leong to 3 more medical groups.
Does Dr. Patrick Leong accept Medicare?
Yes. CMS data shows Dr. Leong billed Medicare for 699 services in 2024, and Dr. Leong accepts Medicare assignment.
Does Dr. Patrick Leong offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Leong as offering telehealth services.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Patrick Leong see?
CMS counts 156 Medicare patients who saw Dr. Leong in 2024, with an average age of 72.
What services does Dr. Patrick Leong bill to Medicare?
In 2024, Dr. Leong's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and medicare service (G0439).
What drugs does Dr. Patrick Leong prescribe most?
In 2024 Medicare Part D data, Dr. Leong's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Omeprazole.
Has Dr. Patrick Leong received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Dr. Leong from 1 company from 2016 to 2016. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Patrick Leong been practicing?
Dr. Leong graduated from medical school in 1983, 43 years ago.
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