David H. Tsai, M.D.
Geriatric Medicine (Internal Medicine) Physician · Lowell, MA
David H. Tsai, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Lowell, Massachusetts, and NPI 1386673713, issued on Jun 30, 2006. Check the license (Massachusetts 158429, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- David H. Tsai
- Credential
- M.D.
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 158429 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1081 Varnum Ave, Lowell, MA 01854
- Phone
- (978) 427-6810
- Enumerated
- Jun 30, 2006
- Record last updated
- Dec 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (978) 427-6887
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 225 in Massachusetts → Look up another NPI →
Also registered at 1081 Varnum Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brittany CollinsFamily Nurse Practitioner1548710015
- Karen May, RD; LDNRegistered Dietitian1457885998
- Julie O'Connor, M.D.Family Medicine Physician1528389863
- Sara Riley, OTR/LOccupational Therapist1407976988
Verify David H. Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 158429Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
4,494 Medicare Part D claims for 149 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 250 claims were for opioids.
Most prescribed
- Atorvastatin Calcium216 claims
- Sertraline Hcl163 claims
- Trazodone Hcl152 claims
- Levothyroxine Sodium151 claims
- Amlodipine Besylate137 claims
- Omeprazole132 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.
David H. Tsai among 225 geriatric medicine (internal medicine) physician records in Massachusetts
David H. Tsai, M.D. is one of 225 geriatric medicine (internal medicine) physician records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 44% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Massachusetts
There are 225 geriatric medicine (internal medicine) physician records in Massachusetts.
All 225 in Massachusetts → Every provider in Lowell → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Jokha Ahmed, MDLowell, MA 018541306369749
- Vasant Patel, M.D.North Reading, MA 018641811900442
- Julie Moran, D.O.Tewksbury, MA 018761841231925
- Jonathan Harding, M.D.Chelmsford, MA 018241548295330
- Asif Merchant, MDChelmsford, MA 018241538152335
- Kshitij Gupta, M.D.Wilmington, MA 018871326411232
- Eric Reines, MDLynn, MA 019011154416816
- Vivian Chan, M.DLynn, MA 019021316321193
Common questions
What is David H. Tsai, M.D.'s NPI number?
David H. Tsai, M.D.'s National Provider Identifier (NPI) is 1386673713, issued on Jun 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David H. Tsai, M.D. located?
The NPPES record lists a practice address at 1081 Varnum Ave, Lowell, MA, 01854. Phone: (978) 427-6810. Providers update this record themselves, so call before visiting.
How can I verify David H. Tsai, M.D.'s license?
NPPES lists Massachusetts license number 158429, 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 David H. Tsai, M.D. prescribe under Medicare Part D?
In 2024, David H. Tsai, M.D. had 4,494 Medicare Part D claims for 149 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.