Doctor profile · Federal record
Dr. Seiya Tokunaga, DO
Internal Medicine Physician (CMS: Hospitalist) · Student in an Organized Health Care Education/Training Program · Oxnard, CA
- NPI 1629572334
- Accepts Medicare
- 8 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1600 N Rose Ave
Oxnard, CA 930303722
(805) 988-2505
fax (805) 988-2502
Credentials & registration
- NPI registered
- March 2018 — 8 yrs on file
- Profile last updated
- November 7, 2021
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #20A17872
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1629572334. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
189
Distinct HCPCS
5
Medicare allowed
$23,344
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 70 | 22 | $83 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 41 | 39 | $182 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 30 | 29 | $137 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 30 | 16 | $125 | |
99239 |
Hospital discharge day management, more than 30 minutes | 18 | 13 | $121 |
In context: peer comparison
Among 12 peers in Oxnard Internal Medicine Physician, average services per provider: 202. This provider delivers 0.9× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Seiya Tokunaga's medical specialty?
Dr. Seiya Tokunaga practices Internal Medicine Physician in Oxnard, CA.
Where does Dr. Seiya Tokunaga practice?
Dr. Seiya Tokunaga practices at 1600 N Rose Ave, Oxnard, CA 930303722. Office phone: 8059882505.
What is Dr. Seiya Tokunaga's NPI?
Dr. Seiya Tokunaga's National Provider Identifier (NPI) is 1629572334, issued by NPPES.
Does Dr. Seiya Tokunaga accept Medicare assignment?
Yes. Dr. Seiya Tokunaga accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Seiya Tokunaga commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with moderate level of medical decision making (HCPCS 99223); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.