Doctor profile · Federal record
Dr. Diane Sun, MD
Internal Medicine Physician (CMS: Internal Medicine) · Boston, MA
- NPI 1245721018
- Accepts Medicare
- 8 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
800 Washington St
Boston, MA 021111552
(617) 636-5000 - Mailing address
-
110 Newbury St Apt 4R
Boston, MA 021162945
Credentials & registration
- NPI registered
- May 2018 — 8 yrs on file
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Massachusetts #276319
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1245721018. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
307
Distinct HCPCS
6
Medicare allowed
$32,178
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 138 | 58 | $83 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 67 | 33 | $126 | |
99238 |
Hospital discharge day management, 30 minutes or less | 54 | 53 | $87 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 23 | 22 | $185 | |
99239 |
Hospital discharge day management, more than 30 minutes | 13 | 13 | $123 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 12 | 12 | $139 |
In context: peer comparison
Among 547 peers in this city , average services per provider: 81. This provider delivers 3.8× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Diane Sun's medical specialty?
Dr. Diane Sun practices Internal Medicine Physician in Boston, MA.
Where does Dr. Diane Sun practice?
Dr. Diane Sun practices at 800 Washington St, Boston, MA 021111552. Office phone: 6176365000.
What is Dr. Diane Sun's NPI?
Dr. Diane Sun's National Provider Identifier (NPI) is 1245721018, issued by NPPES.
Does Dr. Diane Sun accept Medicare assignment?
Yes. Dr. Diane Sun accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Diane Sun commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99238). Source: CMS Medicare Physician & Other Practitioners file.