Doctor profile · Federal record
Dr. Johnna Gemelos, D.O.
Internal Medicine Physician (CMS: Internal Medicine) · Chula Vista, CA
- NPI 1528300928
- Accepts Medicare
- 13 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
435 H St
Chula Vista, CA 919104307
(619) 691-7000
Credentials & registration
- NPI registered
- March 2013 — 13 yrs on file
- Profile last updated
- June 30, 2016
- Year of graduation
- 2013 — 13 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #20A13681
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1528300928. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
389
Distinct HCPCS
4
Medicare allowed
$48,040
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 268 | 96 | $123 | |
99239 |
Hospital discharge day management, more than 30 minutes | 67 | 66 | $119 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 27 | 27 | $179 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 27 | 11 | $82 |
In context: peer comparison
Among 32 peers in Chula Vista Internal Medicine Physician, average services per provider: 140. This provider delivers 2.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
249
Patients
201
Total drug cost
$12,449
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cefuroxime (Cefuroxime Axetil) | Brand | 35 | 34 | $299 |
| Doxycycline Hyclate | Generic | 22 | 21 | $131 |
| Pantoprazole Sodium | Generic | 21 | 19 | $219 |
| Levothyroxine Sodium | Generic | 19 | 11 | $212 |
| Atorvastatin Calcium | Generic | 18 | 18 | $412 |
| Carvedilol | Generic | 18 | 15 | $146 |
| Furosemide | Generic | 18 | 18 | $81 |
| Amlodipine Besylate | Generic | 16 | 16 | $122 |
| Gabapentin | Generic | 16 | 14 | $136 |
| Lantus Solostar (Insulin Glargine,Hum.Rec.Anlog) | Brand | 16 | 11 | $9,308 |
Frequently asked questions
What is Dr. Johnna Gemelos's medical specialty?
Dr. Johnna Gemelos practices Internal Medicine Physician in Chula Vista, CA.
Where does Dr. Johnna Gemelos practice?
Dr. Johnna Gemelos practices at 435 H St, Chula Vista, CA 919104307. Office phone: 6196917000.
What is Dr. Johnna Gemelos's NPI?
Dr. Johnna Gemelos's National Provider Identifier (NPI) is 1528300928, issued by NPPES.
Does Dr. Johnna Gemelos accept Medicare assignment?
Yes. Dr. Johnna Gemelos accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Johnna Gemelos commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.