Patrick Leong, DO
Internal Medicine Physician · Somerville, MA
Patrick Leong, DO is an internal medicine physician with a practice address in Somerville, Massachusetts, and NPI 1447237003, issued on Dec 27, 2005. Check the license (Massachusetts 151924, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Patrick Leong
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 151924 MA
7813 NH
Self-reported in NPPES; status is on the state search - Practice location
- 440 Foley St, Somerville, MA 02145
- Phone
- (857) 282-0777
- Enumerated
- Dec 27, 2005
- Record last updated
- Aug 2, 2023
- Medicaid ID
- 30005217 NH
- Medicare enrollment
- Enrolled (PECOS I20220404001227); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 440 Foley St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Deborah Adner, PAPhysician Assistant1821025214
- Lucia Dias-Hoff, MDFamily Medicine Physician1104893155
- James Ehrlich, DNP, FNP-BCFamily Nurse Practitioner1134696800
- Elizabeth Ferreira, RNAmbulatory Care Registered Nurse1326960055
- Marie Grace Han, FNP-CNurse Practitioner1497008247
- Luis Henkel, M.D.Internal Medicine Physician1578787248
Verify Patrick Leong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 151924Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average internal medicine physician in 2024
839 Medicare Part D claims for 169 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Atorvastatin Calcium93 claims
- Amlodipine Besylate51 claims
- Omeprazole45 claims
- Jardiance41 claims
- Lisinopril36 claims
- Metoprolol Succinate33 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 2 group practices
- Massachusetts General Physicians Organization IncSomerville, MA
- The General Hospital CorporationBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick Leong among 6,825 internal medicine physician records in Massachusetts
Patrick Leong, DO is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1983 · median 2004 among the 4,103 with a school on file
- Record last updated2023 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 internal medicine physician records list a practice address in Somerville
They are 36 of the 1,860 NPPES records with a practice address in Somerville, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Somerville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jessamyn Blau, MDSomerville, MA 021451376960690
- Laura BrightmanSomerville, MA 021451801970546
- David Epstein, M.D.Somerville, MA 021451396753067
- Luis Henkel, M.D.Somerville, MA 021451578787248
- Jonathan Holder, DO,MPHSomerville, MA 021451629166244
- Rebecca Rogers, M.D.Somerville, MA 021451205120862
- Brian Smerkers, MDSomerville, MA 021451497140305
- Bonni Stahl, MDSomerville, MA 021451568756062
Common questions
What is Patrick Leong, DO's NPI number?
Patrick Leong, DO's National Provider Identifier (NPI) is 1447237003, issued on Dec 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Patrick Leong, DO located?
The NPPES record lists a practice address at 440 Foley St, Somerville, MA, 02145. Phone: (857) 282-0777. Providers update this record themselves, so call before visiting.
How can I verify Patrick Leong, DO's license?
NPPES lists Massachusetts license number 151924, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Patrick Leong, DO prescribe under Medicare Part D?
In 2024, Patrick Leong, DO had 839 Medicare Part D claims for 169 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.