Doctor profile · Federal record
Dr. John Dzundza, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · San Francisco, CA
- NPI 1912223199
- Accepts Medicare
- 16 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
533 Parnassus Ave Box 0131, Division of Hospital Medicine, UCSF
San Francisco, CA 941430131
(415) 443-3459
Credentials & registration
- NPI registered
- April 2010 — 16 yrs on file
- Profile last updated
- January 6, 2015
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A125733
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1912223199. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
565
Distinct HCPCS
5
Medicare allowed
$69,713
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 376 | 102 | $134 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 63 | 27 | $89 | |
G0316 |
Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th | 50 | 20 | $35 | |
99239 |
Hospital discharge day management, more than 30 minutes | 46 | 43 | $131 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 30 | 30 | $196 |
In context: peer comparison
Among 236 peers in this city , average services per provider: 93. This provider delivers 6.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
46
Patients
12
Total drug cost
$11,692
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Acyclovir | Generic | 16 | 12 | $261 |
| Atovaquone | Generic | 16 | 0 | $11,352 |
| Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim) | Brand | 14 | 0 | $79 |
Hospital affiliations
Frequently asked questions
What is Dr. John Dzundza's medical specialty?
Dr. John Dzundza practices Internal Medicine Physician in San Francisco, CA.
Where does Dr. John Dzundza practice?
Dr. John Dzundza practices at 533 Parnassus Ave Box 0131, San Francisco, CA 941430131. Office phone: 4154433459.
What is Dr. John Dzundza's NPI?
Dr. John Dzundza's National Provider Identifier (NPI) is 1912223199, issued by NPPES.
Does Dr. John Dzundza accept Medicare assignment?
Yes. Dr. John Dzundza accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Dzundza commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th (HCPCS G0316). Source: CMS Medicare Physician & Other Practitioners file.