Dr. Timothy W. Tsai, MD
- Medicare services, 2023
- 16
- Part D claims, 2024
- 107
- Hospital affiliations
- 2
- Medical groups
- 4
- State license
- 1
- Practice address
- One Hospital Road, First Fl, Wing 5, PO Box 1477, Oak Bluffs, MA 02557
- Practice phone
- Call (508) 693-0410
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tsai's professional email, personal email and mobile number
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Dr. Timothy W. Tsai is an emergency medicine physician in Oak Bluffs, Massachusetts
Dr. Tsai practices at Martha's Vineyard Hospital in Oak Bluffs, Massachusetts, part of Mass General Brigham.
Dr. Tsai's NPI, 1740387356, was assigned on September 19, 2006. Dr. Tsai graduated from Saint Louis University School of Medicine in 1988. Dr. Tsai holds Massachusetts license 76209.
- NPI
- 1740387356NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7719978576
- NPI enumeration date
- September 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (508) 693-0410
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Timothy W. Tsai practices at 2 locations in Oak Bluffs, Massachusetts
Dr. Tsai's primary practice is Martha's Vineyard Hospital, at One Hospital Road, First Fl, Wing 5, PO Box 1477, Oak Bluffs, MA 02557 in Dukes County. The practice phone is (508) 693-0410. Dr. Tsai also practices at Martha's Vineyard Hospital, 1 Hospital Way, Oak Bluffs, MA 02557.
- Martha's Vineyard HospitalPrimaryOne Hospital Road, First Fl, Wing 5, PO Box 1477, Oak Bluffs, MA 02557 · Dukes CountyPhone(508) 693-0410
- Martha's Vineyard Hospital1 Hospital Way, Oak Bluffs, MA 02557 · Dukes CountyPhone(508) 693-0410
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Timothy W. Tsai is affiliated with 3 sites of care and 4 medical groups
Dr. Tsai's primary practice is Martha's Vineyard Hospital in Oak Bluffs, Massachusetts, part of Mass General Brigham. Dr. Tsai is also affiliated with Nantucket Cottage Hospital. The medical group on file is Martha's Vineyard Hospital. Dmand AI also links Dr. Tsai to 3 more medical groups and 1 senior living community, each named with a free account. Dr. Tsai'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. Timothy W. Tsai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tsai practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Martha's Vineyard Hospital | Available with a free account |
| +2 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Timothy W. Tsai is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Tsai's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Tsai is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Tsai
Counts of emergency medicine physicians 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. Timothy W. Tsai billed Medicare for 16 services in 2023
CMS data shows 16 Medicare services from Dr. Tsai across 1 procedure code in 2023. Medicare paid $1,312 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tsai's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 812023: 1680%
- Tests and treatments
- 2022: 182023: 0100%
Dr. Tsai compared with the Massachusetts median for emergency medicine physicians, 2023
- Dr. Tsai
- Massachusetts median
- Medicare services
- 16vs 34195% below
- Part D claims
- 24vs 3633% below
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Tsai's most billed Medicare procedure codes, 2023
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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tsai and other emergency medicine physicians in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy W. Tsai's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Tsai's median patient age at 75, with 54% women.
Dr. Tsai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women54%
- Men45%
Source: Dmand AI Patient Panel Data
Dr. Timothy W. Tsai wrote 107 Medicare Part D claims in 2024
In 2024, Dr. Tsai wrote 107 Medicare Part D claims for 91 patients. 96% of them were for generic drugs. CMS names the drug for 24 of them, across 2 drugs with 11 or more claims each, at $96 in total drug cost. In 2018, CMS named 27 claims across 2 drugs.
Dr. Tsai's Part D claims by kind of drug, 2024
- Generic103 claims96%
- Brand-name and other4 claims4%
Dr. Tsai'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. Tsai's Part D claims, 2024
- Antibiotics43%46 of 107 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, 2018 to 2024
- 2018
- 2024
- Claims for drugs CMS names
- 2018: 272024: 2411%
Drugs named by CMS: 2 in 2024, 2 in 2018.
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
How Dr. Timothy W. Tsai takes part in Medicare
Dr. Tsai accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Timothy W. Tsai graduated from Saint Louis University School of Medicine
Dr. Tsai graduated from Saint Louis University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Timothy W. Tsai'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice 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 Data |
| 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. Timothy W. Tsai
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. Timothy W. Tsai's NPI number?
Dr. Timothy W. Tsai's NPI number is 1740387356. It was assigned on September 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy W. Tsai?
Dr. Timothy W. Tsai is an emergency medicine physician in Oak Bluffs, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Timothy W. Tsai practice?
Dr. Tsai practices at One Hospital Road, First Fl, Wing 5, PO Box 1477, Oak Bluffs, MA 02557. Dr. Tsai also practices at 1 Hospital Way, Oak Bluffs, MA 02557. Dr. Tsai's primary practice is Martha's Vineyard Hospital in Oak Bluffs, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Tsai to 3 medical groups and 1 senior living community.
What is Dr. Timothy W. Tsai's office phone number?
The practice phone on file for Dr. Tsai is (508) 693-0410.
What is Dr. Timothy W. Tsai's medical license number?
Dr. Tsai holds Massachusetts license 76209.
Which hospitals is Dr. Timothy W. Tsai affiliated with?
Dr. Tsai practices at Martha's Vineyard Hospital in Oak Bluffs, Massachusetts. Dr. Tsai is also affiliated with Nantucket Cottage Hospital.
What medical group is Dr. Timothy W. Tsai part of?
Dr. Tsai is linked to Martha's Vineyard Hospital. Dmand AI links Dr. Tsai to 3 more medical groups.
Does Dr. Timothy W. Tsai accept Medicare?
Yes. CMS data shows Dr. Tsai billed Medicare for 16 services in 2023, and Dr. Tsai accepts Medicare assignment.
What services does Dr. Timothy W. Tsai bill to Medicare?
In 2023, Dr. Tsai's most billed Medicare services were emergency department visit (99284).
Where did Dr. Timothy W. Tsai go to medical school?
Dr. Tsai graduated from Saint Louis University School of Medicine in 1988.
What drugs does Dr. Timothy W. Tsai prescribe most?
In 2024 Medicare Part D data, Dr. Tsai's most prescribed drugs by claims were Cephalexin and Prednisone.
How long has Dr. Timothy W. Tsai been practicing?
Dr. Tsai graduated from medical school in 1988, 38 years ago.
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