Doctor profile · Federal record
Dr. Dennis Buchanan, MD
Obstetrics & Gynecology Physician (CMS: Obstetrics/Gynecology) · Fullerton, CA
- NPI 1003864737
- Accepts Medicare
- 47 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
101 Laguna RD Ste 100
Fullerton, CA 928353601
(714) 992-5350
fax (714) 992-8156
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- October 15, 2021
- Year of graduation
- 1979 — 47 yrs since
- Specialty taxonomy
- 207V00000X — NUCC code
- State license (1)
- California #G42457
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1003864737. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
48
Distinct HCPCS
2
Medicare allowed
$3,004
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
G0101 |
Cervical or vaginal cancer screening; pelvic and clinical breast examination | 31 | 31 | $43 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 17 | 16 | $99 |
In context: peer comparison
Among 3 peers in Fullerton Obstetrics & Gynecology Physician, average services per provider: 23. This provider delivers 2.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
197
Patients
38
Total drug cost
$20,316
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Estradiol | Generic | 68 | 26 | $1,473 |
| Fluconazole | Generic | 22 | 0 | $42 |
| Premarin (Estrogens, Conjugated) | Brand | 18 | 0 | $8,192 |
| Prempro (Estrogen,Con/M-Progest Acet) | Brand | 18 | 0 | $6,681 |
| Estradiol (Twice Weekly) (Estradiol) | Brand | 17 | 0 | $2,613 |
| Clobetasol Propionate | Generic | 15 | 12 | $464 |
| Medroxyprogesterone Acetate | Generic | 15 | 0 | $170 |
| Alendronate Sodium | Generic | 12 | 0 | $185 |
| Progesterone (Progesterone, Micronized) | Brand | 12 | 0 | $496 |
Frequently asked questions
What is Dr. Dennis Buchanan's medical specialty?
Dr. Dennis Buchanan practices Obstetrics & Gynecology Physician in Fullerton, CA.
Where does Dr. Dennis Buchanan practice?
Dr. Dennis Buchanan practices at 101 Laguna RD Ste 100, Fullerton, CA 928353601. Office phone: 7149925350.
What is Dr. Dennis Buchanan's NPI?
Dr. Dennis Buchanan's National Provider Identifier (NPI) is 1003864737, issued by NPPES.
Does Dr. Dennis Buchanan accept Medicare assignment?
Yes. Dr. Dennis Buchanan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Dennis Buchanan commonly perform?
Top Medicare-reported procedures in 2023: Cervical or vaginal cancer screening; pelvic and clinical breast examination (HCPCS G0101); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.