Doctor profile · Federal record
Dr. John Tsay, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Emergency Medicine Physician · Nephrology Physician · Boston, MA
- NPI 1164632691
- Accepts Medicare
- 21 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1400 Vfw Parkway
Boston, MA 02132
(857) 203-3000
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- January 28, 2014
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Massachusetts #250564
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164632691. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
27
Distinct HCPCS
2
Medicare allowed
$2,901
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 14 | 14 | $93 | |
99239 |
Hospital discharge day management, more than 30 minutes | 13 | 13 | $123 |
In context: peer comparison
Among 547 peers in this city , average services per provider: 81. This provider delivers 0.3× the peer median.Frequently asked questions
What is Dr. John Tsay's medical specialty?
Dr. John Tsay practices Internal Medicine Physician in Boston, MA.
Where does Dr. John Tsay practice?
Dr. John Tsay practices at 1400 Vfw Parkway, Boston, MA 02132. Office phone: 8572033000.
What is Dr. John Tsay's NPI?
Dr. John Tsay's National Provider Identifier (NPI) is 1164632691, issued by NPPES.
Does Dr. John Tsay accept Medicare assignment?
Yes. Dr. John Tsay accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Tsay commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.