Doctor profile · Federal record
Dr. Dena Werner, M.D.
Internal Medicine Physician · Ventura, CA
- NPI 1669758918
- 15 yrs on file
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 5 locations .
- Primary practice
-
2721 E Main St
Ventura, CA 930032803
(805) 667-2841 - Additional location
-
2400 S C St
Oxnard, CA 930334555
(805) 240-7000 - Additional location
-
300 Hillmont Ave
Ventura, CA 930031651
(805) 652-6000 - Additional location
-
300 Hillmont Ave Ste 502
Ventura, CA 930031651
(805) 652-6222 - Additional location
-
325 W Channel Islands Blvd
Oxnard, CA 930334501
(805) 240-7000 - Mailing address
-
325 W Channel Islands Blvd
Oxnard, CA 930334501
Show 2 more locations
Credentials & registration
- NPI registered
- November 2011 — 15 yrs on file
- Profile last updated
- October 28, 2025
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A127060
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669758918. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
217
Distinct HCPCS
6
Medicare allowed
$26,043
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 93 | 35 | $151 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 33 | 16 | $125 | |
G2212 |
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 33 | 19 | $33 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 23 | 18 | $103 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 18 | 18 | $182 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 17 | 13 | $69 |
In context: peer comparison
Among 13 peers in Ventura Internal Medicine Physician, average services per provider: 120. This provider delivers 1.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
295
Patients
13
Total drug cost
$118,514
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 48 | 13 | $755 |
| Fluconazole | Generic | 40 | 0 | $10,195 |
| Vancomycin Hcl | Generic | 33 | 0 | $4,435 |
| Biktarvy (Bictegrav/Emtricit/Tenofov Ala) | Brand | 24 | 0 | $96,198 |
| Ceftriaxone (Ceftriaxone Sodium) | Brand | 24 | 0 | $2,292 |
| Azithromycin | Generic | 22 | 0 | $914 |
| Ethambutol Hcl | Generic | 19 | 0 | $1,545 |
| Doxycycline Hyclate | Generic | 18 | 0 | $536 |
| Amlodipine Besylate | Generic | 15 | 0 | $202 |
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 14 | 0 | $265 |
Frequently asked questions
What is Dr. Dena Werner's medical specialty?
Dr. Dena Werner practices Internal Medicine Physician in Ventura, CA.
Where does Dr. Dena Werner practice?
Dr. Dena Werner practices at 2721 E Main St, Ventura, CA 930032803. Office phone: 8056672841.
What is Dr. Dena Werner's NPI?
Dr. Dena Werner's National Provider Identifier (NPI) is 1669758918, issued by NPPES.
What procedures does Dr. Dena Werner commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or (HCPCS G2212). Source: CMS Medicare Physician & Other Practitioners file.