J Gen Intern Med
BacteremiaSepsis
Dr. Long H. Nguyen, MD, MS
NPI1538402656PAC ID0749597896
- Medicare services, 2024
- 209
- Medicare patients, 2024
- 168
- Part D claims, 2024
- 219
- Publications
- 3
- Hospital affiliations
- 4
- 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. Nguyen'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. Long H. Nguyen is a gastroenterologist in Boston, Massachusetts
Dr. Nguyen practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Nguyen's NPI, 1538402656, was assigned on March 27, 2013. Dr. Nguyen graduated from Stanford University School of Medicine in 2013. Dr. Nguyen holds Massachusetts license 262313.
NPI and contact details
- NPI
- 1538402656NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749597896
- NPI enumeration date
- March 27, 2013
- 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
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Long H. Nguyen practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Nguyen'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. Long H. Nguyen is affiliated with 5 sites of care and 3 medical groups
Dr. Nguyen's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Nguyen is also affiliated with Newton-Wellesley Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Nguyen to 2 more hospitals, 2 medical groups and 1 community health center, each named with a free account.
Newton-Wellesley HospitalMassachusetts General Physicians Organization (MGPO)2 hospitalsNames with a free account2 medical groupsNames with a free account1 community health centerName with a free account
See all 8 affiliations for Dr. NguyenSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Long H. Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 5 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 |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Long H. Nguyen is one of 597 gastroenterologists in Massachusetts
Gastroenterology is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Nguyen is licensed in Massachusetts.
Specialties and state licenses
- Gastroenterology, MassachusettsPrimary
Gastroenterologists near Dr. Nguyen
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
597gastroenterologists in Massachusetts220gastroenterologists in Boston65gastroenterologists at Massachusetts General Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Long H. Nguyen billed Medicare for 209 services in 2024
CMS data shows 209 Medicare services from Dr. Nguyen across 8 procedure codes in 2024, for 168 Medicare patients. Medicare paid $23,855 for them.
Medicare services, 2024209
Medicare patients168
Paid by Medicare$23,855
Procedure codes8
Dr. Nguyen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1372024: 11516%
- Surgery
- 2023: 882024: 5834%
- Other services
- 2023: 412024: 3612%
Where Dr. Nguyen's Medicare services took place, 2024
- In an office178%
- In a facility19292%
Dr. Nguyen compared with the Massachusetts median for gastroenterologists, 2024
- Dr. Nguyen
- Massachusetts median
- Medicare services
- 209vs 51960% below
- Medicare patients
- 168vs 34351% below
- Part D claims
- 132vs 30056% below
Medians across 583 gastroenterologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Nguyen'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.
Need commercial claims for Dr. Nguyen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nguyen and other gastroenterologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Long H. Nguyen treated 168 Medicare patients in 2024, average age 73
CMS counts 168 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 65 to 74, with 75 patients. 69% of them have high cholesterol, and 67% have high blood pressure. 21% are also on Medicaid. Their average risk score is 1.83, 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. Nguyen's median patient age at 67, with 53% women.
Medicare patients, 2024168
Average age73
Average risk score1.83
Also on Medicaid21%
Dr. Nguyen's Medicare patients by age, 2024
Dr. Nguyen's Medicare patients by sex, 2024
- Women10361%
- Men6539%
Chronic conditions among Dr. Nguyen's Medicare patients, 2024
- High cholesterol69%
- High blood pressure67%
- Arthritis52%
- Anxiety36%
- Ischemic heart disease36%
- Mood disorders36%
- Chronic kidney disease35%
- Depression34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nguyen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Long H. Nguyen wrote 219 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 219 Medicare Part D claims for 106 patients. 77% of them were for generic drugs. CMS names the drug for 132 of them, across 6 drugs with 11 or more claims each, at $28,878 in total drug cost. In 2023, CMS named 95 claims across 6 drugs.
Part D claims, 2024219
Drugs named by CMS6
Total drug cost$28,878
Part D patients106
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic168 claims77%
- Brand-name and other51 claims23%
Dr. Nguyen'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. Nguyen's Part D claims, 2024
- Antibiotics7%16 of 219 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: 952024: 13239%
Drugs named by CMS: 6 in 2024, 6 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. Long H. Nguyen ranks in the 61st percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nguyen as offering telehealth. CMS counts 43 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Nguyen, more than 61% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Nguyen ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 61st percentile43 procedures
- Colonoscopy
- 54th percentile30 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Long H. Nguyen has 3 publications on record
Dmand AI links 3 papers to Dr. Nguyen, published from 2022 to 2023. The most frequent topics are Bacteremia and Sepsis.
Papers3
Years published2022 to 2023
Topics Dr. Nguyen writes about most
- Bacteremia
- Sepsis
Recent publications by Dr. Nguyen
Clin Microbiol Infect
BacteremiaProbabilitySepsis
Alcohol DrinkingBlisterDietary Supplements
See who Dr. Nguyen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nguyen works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Long H. Nguyen received $561 in industry payments from 2022 to 2025
CMS Open Payments shows 4 general payments to Dr. Nguyen from 3 drug and device companies from 2022 to 2025. Speaker and faculty fees make up the largest share, 64% of the total. Partner Therapeutics, Inc. paid the most, $356.
General payments to Dr. Nguyen by program year, 2022 to 2025
General payments to Dr. Nguyen by kind, 2022 to 2025
$561in total
- Speaker and faculty fees$35664%
- Food and beverage$20436%
Companies that paid Dr. Nguyen the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Long H. Nguyen graduated from Stanford University School of Medicine
Dr. Nguyen graduated from Stanford University School of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Long H. Nguyen'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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (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. Long H. Nguyen
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. Long H. Nguyen's NPI number?
Dr. Long H. Nguyen's NPI number is 1538402656. It was assigned on March 27, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Long H. Nguyen?
Dr. Long H. Nguyen is a gastroenterologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Long H. Nguyen practice?
Dr. Nguyen practices at 55 Fruit Street, Boston, MA 02114. Dr. Nguyen's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Nguyen to 2 hospitals, 2 medical groups and 1 community health center.
What is Dr. Long H. Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (617) 726-2000.
What is Dr. Long H. Nguyen's medical license number?
Dr. Nguyen holds Massachusetts license 262313.
Which hospitals is Dr. Long H. Nguyen affiliated with?
Dr. Nguyen practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Nguyen is also affiliated with Newton-Wellesley Hospital. Dmand AI links Dr. Nguyen to 2 more hospitals.
What medical group is Dr. Long H. Nguyen part of?
Dr. Nguyen is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Nguyen to 2 more medical groups.
Does Dr. Long H. Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 209 services in 2024, and Dr. Nguyen accepts Medicare assignment.
Does Dr. Long H. Nguyen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nguyen as offering telehealth services.
How many Medicare patients does Dr. Long H. Nguyen see?
CMS counts 168 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 73.
Show 6 more questionsShow fewer questions
What services does Dr. Long H. Nguyen bill to Medicare?
In 2024, Dr. Nguyen's most billed Medicare services were surgery: digestive system (45385), office visit, established patient (99215) and medicare service (G0500).
Where did Dr. Long H. Nguyen go to medical school?
Dr. Nguyen graduated from Stanford University School of Medicine in 2013.
What drugs does Dr. Long H. Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Gavilyte-G, Omeprazole and Peg-3350 And Electrolytes.
Has Dr. Long H. Nguyen received payments from drug or device companies?
CMS Open Payments shows $561 in general payments to Dr. Nguyen from 3 companies from 2022 to 2025. The largest total came from Partner Therapeutics, Inc.
How long has Dr. Long H. Nguyen been practicing?
Dr. Nguyen graduated from medical school in 2013, 13 years ago.
Does Dr. Long H. Nguyen do research?
Dmand AI links 3 publications to Dr. Nguyen, published from 2022 to 2023.
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