Dr. Allen Lun Hwang, MD
- Medicare services, 2024
- 1,356
- Medicare patients, 2024
- 595
- Part D claims, 2024
- 696
- Hospital affiliations
- 2
- Industry payments
- $19,398
- Practice address
- 295 Varnum Avenue, Lowell, MA 01854
- Practice phone
- Call (978) 937-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hwang's professional email, personal email and mobile number
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Dr. Allen Lun Hwang is a gastroenterologist in Lowell, Massachusetts
Dr. Hwang practices at Lowell General Hospital in Lowell, Massachusetts, part of Tufts Medicine.
Dr. Hwang's NPI, 1558532689, was assigned on March 17, 2008. Dr. Hwang graduated from Duke University School of Medicine in 2006. Dr. Hwang holds Massachusetts license 250535.
- NPI
- 1558532689NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365691276
- NPI enumeration date
- March 17, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (978) 937-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Allen Lun Hwang practices at Lowell General Hospital in Lowell, Massachusetts
Dr. Hwang's primary practice is Lowell General Hospital, at 295 Varnum Avenue, Lowell, MA 01854 in Middlesex County. The practice phone is (978) 937-6000.
- Lowell General Hospital295 Varnum Avenue, Lowell, MA 01854 · Middlesex CountyPhone(978) 937-6000
Source: Dmand AI Affiliation Data
Dr. Allen Lun Hwang is affiliated with 3 sites of care and 1 medical group
Dr. Hwang's primary practice is Lowell General Hospital in Lowell, Massachusetts, part of Tufts Medicine. Dr. Hwang is also affiliated with Merrimack Health Lawrence Hospital. The medical group on file is Integrated Gastroenterology Consultants. Dmand AI also links Dr. Hwang to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Allen Lun Hwang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hwang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lowell General Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Allen Lun Hwang is one of 597 gastroenterologists in Massachusetts
Gastroenterology is Dr. Hwang's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Hwang's licenses on file in 2 states: Massachusetts and California.
Specialties and state licenses
- Gastroenterology, MassachusettsPrimary
- Internal medicine, California
Gastroenterologists near Dr. Hwang
Counts of gastroenterologists 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. Allen Lun Hwang billed Medicare for 1,356 services in 2024
CMS data shows 1,356 Medicare services from Dr. Hwang across 24 procedure codes in 2024, for 595 Medicare patients. Medicare paid $105,069 for them.
Dr. Hwang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5402024: 5341%
- Tests and treatments
- 2023: 2292024: 32140%
- Surgery
- 2023: 2852024: 25311%
- Other services
- 2023: 262024: 211712%
- Imaging
- 2023: 132024: 37185%
Where Dr. Hwang's Medicare services took place, 2024
- In an office95470%
- In a facility40230%
Dr. Hwang compared with the Massachusetts median for gastroenterologists, 2024
- Dr. Hwang
- Massachusetts median
- Medicare services
- 1,356vs 5192.6 times
- Medicare patients
- 595vs 34373% above
- Part D claims
- 539vs 30080% above
Medians across 583 gastroenterologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Hwang'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. Hwang?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hwang and other gastroenterologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Allen Lun Hwang treated 595 Medicare patients in 2024, average age 72
CMS counts 595 Medicare patients who saw Dr. Hwang in 2024. The largest group is 65 to 74, with 244 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.64, 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. Hwang's median patient age at 60, with 58% women.
Dr. Hwang's Medicare patients by age, 2024
Dr. Hwang's Medicare patients by sex, 2024
- Women35760%
- Men23840%
Chronic conditions among Dr. Hwang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Anxiety38%
- Mood disorders38%
- Diabetes37%
- Chronic kidney disease36%
- Depression34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hwang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Allen Lun Hwang wrote 696 Medicare Part D claims in 2024
In 2024, Dr. Hwang wrote 696 Medicare Part D claims for 261 patients. 67% of them were for generic drugs. CMS names the drug for 539 of them, across 18 drugs with 11 or more claims each, at $184,072 in total drug cost. In 2023, CMS named 491 claims across 17 drugs.
Dr. Hwang's Part D claims by kind of drug, 2024
- Generic466 claims67%
- Brand-name230 claims33%
Dr. Hwang'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. Hwang's Part D claims, 2024
- Antibiotics5%38 of 696 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: 4912024: 53910%
Drugs named by CMS: 18 in 2024, 17 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. Allen Lun Hwang ranks in the 93rd percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Hwang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hwang as offering telehealth. CMS counts 252 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Hwang, more than 93% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Hwang ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 93rd percentile252 procedures
- Colonoscopy
- 90th percentile164 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. Allen Lun Hwang received $19,398 in industry payments from 2016 to 2025
CMS Open Payments shows 256 general payments to Dr. Hwang from 45 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 64% of the total. CONMED Corporation paid the most, $5,435.
General payments to Dr. Hwang by program year, 2016 to 2025
General payments to Dr. Hwang by kind, 2016 to 2025
- Consulting fees$12,36364%
- Food and beverage$5,73730%
- Travel and lodging$1,2486%
- Education$500%
Companies that paid Dr. Hwang the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Allen Lun Hwang graduated from Duke University School of Medicine
Dr. Hwang graduated from Duke University School of Medicine in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Allen Lun Hwang'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) |
| 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. Allen Lun Hwang
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. Allen Lun Hwang's NPI number?
Dr. Allen Lun Hwang's NPI number is 1558532689. It was assigned on March 17, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Allen Lun Hwang?
Dr. Allen Lun Hwang is a gastroenterologist in Lowell, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Allen Lun Hwang practice?
Dr. Hwang practices at 295 Varnum Avenue, Lowell, MA 01854. Dr. Hwang's primary practice is Lowell General Hospital in Lowell, Massachusetts, part of Tufts Medicine. Dmand AI also links Dr. Hwang to 1 group practice or clinic.
What is Dr. Allen Lun Hwang's office phone number?
The practice phone on file for Dr. Hwang is (978) 937-6000.
What is Dr. Allen Lun Hwang's medical license number?
Dr. Hwang holds Massachusetts license 250535, one of the licenses on file in 2 states.
Which states has Dr. Allen Lun Hwang been licensed in?
Dmand AI has state licenses on file for Dr. Hwang in Massachusetts and California.
Which hospitals is Dr. Allen Lun Hwang affiliated with?
Dr. Hwang practices at Lowell General Hospital in Lowell, Massachusetts. Dr. Hwang is also affiliated with Merrimack Health Lawrence Hospital.
What medical group is Dr. Allen Lun Hwang part of?
Dr. Hwang is linked to Integrated Gastroenterology Consultants.
Does Dr. Allen Lun Hwang accept Medicare?
Yes. CMS data shows Dr. Hwang billed Medicare for 1,356 services in 2024, and Dr. Hwang accepts Medicare assignment.
Does Dr. Allen Lun Hwang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Hwang as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Allen Lun Hwang see?
CMS counts 595 Medicare patients who saw Dr. Hwang in 2024, with an average age of 72.
What services does Dr. Allen Lun Hwang bill to Medicare?
In 2024, Dr. Hwang's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and physical therapy and rehabilitation (97112).
Where did Dr. Allen Lun Hwang go to medical school?
Dr. Hwang graduated from Duke University School of Medicine in 2006.
What drugs does Dr. Allen Lun Hwang prescribe most?
In 2024 Medicare Part D data, Dr. Hwang's most prescribed drugs by claims were Omeprazole, Sutab and Creon.
Has Dr. Allen Lun Hwang received payments from drug or device companies?
CMS Open Payments shows $19,398 in general payments to Dr. Hwang from 45 companies from 2016 to 2025. The largest total came from CONMED Corporation.
How long has Dr. Allen Lun Hwang been practicing?
Dr. Hwang graduated from medical school in 2006, 20 years ago.
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