Dr. Wei Sum Li, MD
- Medicare services, 2024
- 390
- Medicare patients, 2024
- 172
- Part D claims, 2024
- 3,133
- Hospital affiliations
- 5
- Medical groups
- 3
- 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. Li's professional email, personal email and mobile number
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Dr. Wei Sum Li is an internist in Boston, Massachusetts
Dr. Li practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Li's NPI, 1629425046, was assigned on May 16, 2016. Dr. Li graduated from University of Massachusetts Medical School in 2016. Dr. Li holds Massachusetts license 283634.
- NPI
- 1629425046NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476848631
- NPI enumeration date
- May 16, 2016
- 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
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Wei Sum Li practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Li'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. Wei Sum Li is affiliated with 10 sites of care and 3 medical groups
Dr. Li's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Li is also affiliated with Massachusetts Eye and Ear. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Li to 3 more hospitals, 3 group practices and clinics, 2 medical groups, 1 community health center and 1 home health agency, each named with a free account. Dr. Li's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Wei Sum Li's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Li practices, 10 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 |
| +9 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Wei Sum Li is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Li's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Li's licenses on file in 2 states: Massachusetts and Rhode Island.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
- Rhode Island license
Internists near Dr. Li
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. Wei Sum Li billed Medicare for 390 services in 2024
CMS data shows 390 Medicare services from Dr. Li across 6 procedure codes in 2024, for 172 Medicare patients. Medicare paid $23,077 for them.
Dr. Li's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1992024: 26835%
- Other services
- 2023: 02024: 122
Where Dr. Li's Medicare services took place, 2024
- In an office36594%
- In a facility256%
Dr. Li compared with the Massachusetts median for internists, 2024
- Dr. Li
- Massachusetts median
- Medicare services
- 390vs 43110% below
- Medicare patients
- 172vs 19411% below
- Part D claims
- 2,584vs 4026.4 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Li'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. Wei Sum Li treated 172 Medicare patients in 2024, average age 72
CMS counts 172 Medicare patients who saw Dr. Li in 2024. The largest group is 65 to 74, with 63 patients. 75% of them have high blood pressure, and 62% have high cholesterol. 39% are also on Medicaid. Their average risk score is 1.65, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Li's median patient age at 73, with 52% women.
Dr. Li's Medicare patients by age, 2024
Dr. Li's Medicare patients by sex, 2024
- Women9455%
- Men7845%
Chronic conditions among Dr. Li's Medicare patients, 2024
- High blood pressure75%
- High cholesterol62%
- Arthritis49%
- Anxiety44%
- Mood disorders41%
- Depression35%
- Diabetes33%
- Ischemic heart disease33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Li's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Wei Sum Li wrote 3,133 Medicare Part D claims in 2024
In 2024, Dr. Li wrote 3,133 Medicare Part D claims for 250 patients. 87% of them were for generic drugs. CMS names the drug for 2,584 of them, across 67 drugs with 11 or more claims each, at $199,504 in total drug cost. In 2023, CMS named 1,833 claims across 54 drugs.
Dr. Li's Part D claims by kind of drug, 2024
- Generic2,732 claims87%
- Brand-name378 claims12%
- Other23 claims1%
Dr. Li'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. Li's Part D claims, 2024
- Opioids6%194 of 3,133 claims
- Antibiotics1%20 of 3,133 claims
- Antipsychotics, patients 65 and over0%11 of 3,133 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: 1,8332024: 2,58441%
Drugs named by CMS: 67 in 2024, 54 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. Wei Sum Li offers telehealth to Medicare patients
Dr. Li accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Li as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Wei Sum Li graduated from University of Massachusetts Medical School
Dr. Li graduated from University of Massachusetts Medical School in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Wei Sum Li'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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Wei Sum Li
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. Wei Sum Li's NPI number?
Dr. Wei Sum Li's NPI number is 1629425046. It was assigned on May 16, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Wei Sum Li?
Dr. Wei Sum Li is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Wei Sum Li practice?
Dr. Li practices at 55 Fruit Street, Boston, MA 02114. Dr. Li's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Li to 3 hospitals, 3 group practices and clinics, 2 medical groups, 1 community health center and 1 home health agency.
What is Dr. Wei Sum Li's office phone number?
The practice phone on file for Dr. Li is (617) 726-2000.
What is Dr. Wei Sum Li's medical license number?
Dr. Li holds Massachusetts license 283634, one of the licenses on file in 2 states.
Which states has Dr. Wei Sum Li been licensed in?
Dmand AI has state licenses on file for Dr. Li in Massachusetts and Rhode Island.
Which hospitals is Dr. Wei Sum Li affiliated with?
Dr. Li practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Li is also affiliated with Massachusetts Eye and Ear. Dmand AI links Dr. Li to 3 more hospitals.
What medical group is Dr. Wei Sum Li part of?
Dr. Li is linked to Massachusetts General Hospital. Dmand AI links Dr. Li to 2 more medical groups.
Does Dr. Wei Sum Li accept Medicare?
Yes. CMS data shows Dr. Li billed Medicare for 390 services in 2024, and Dr. Li accepts Medicare assignment.
Does Dr. Wei Sum Li offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Li as offering telehealth services.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Wei Sum Li see?
CMS counts 172 Medicare patients who saw Dr. Li in 2024, with an average age of 72.
What services does Dr. Wei Sum Li bill to Medicare?
In 2024, Dr. Li's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and office visit, established patient (99215).
Where did Dr. Wei Sum Li go to medical school?
Dr. Li graduated from University of Massachusetts Medical School in 2016.
What drugs does Dr. Wei Sum Li prescribe most?
In 2024 Medicare Part D data, Dr. Li's most prescribed drugs by claims were Atorvastatin Calcium, Omeprazole and Oxycodone HCl.
How long has Dr. Wei Sum Li been practicing?
Dr. Li graduated from medical school in 2016, 10 years ago.
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