Doctor profile · Federal record
Dr. Jeffrey Ishizuka, M.D.
Medical Oncology Physician (CMS: Internal Medicine) · Internal Medicine Physician · New Haven, CT
- NPI 1134552185
- Accepts Medicare
- MIPS 71.7 / 100 · 2023
- 13 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
20 York St
New Haven, CT 065103220
(203) 688-4242 - Additional location
-
75 Francis St
Boston, MA 021156110
(617) 732-5500 - Mailing address
-
333 Cedar Street, Shmi, #225
New Haven, CT 065103206
Credentials & registration
- NPI registered
- August 2013 — 13 yrs on file
- Profile last updated
- April 14, 2020
- Year of graduation
- 2013 — 13 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State licenses (2)
- Connecticut #65204 · Massachusetts #255605
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1134552185. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
88
Distinct HCPCS
3
Medicare allowed
$9,667
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 36 | 14 | $151 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 34 | 21 | $70 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 18 | 15 | $103 |
In context: peer comparison
Among 15 peers in New Haven Medical Oncology Physician, average services per provider: 62. This provider delivers 1.4× the peer median.Frequently asked questions
What is Dr. Jeffrey Ishizuka's medical specialty?
Dr. Jeffrey Ishizuka practices Medical Oncology Physician in New Haven, CT.
Where does Dr. Jeffrey Ishizuka practice?
Dr. Jeffrey Ishizuka practices at 20 York St, New Haven, CT 065103220. Office phone: 2036884242.
What is Dr. Jeffrey Ishizuka's NPI?
Dr. Jeffrey Ishizuka's National Provider Identifier (NPI) is 1134552185, issued by NPPES.
Does Dr. Jeffrey Ishizuka accept Medicare assignment?
Yes. Dr. Jeffrey Ishizuka accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jeffrey Ishizuka commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.