Doctor profile · Federal record
Dr. Siobhan Calhoun, MD
Obstetrics & Gynecology Physician (CMS: Obstetrics/Gynecology) · Fremont, CA
- NPI 1396726295
- Accepts Medicare
- MIPS 81.9 / 100 · 2023
- 31 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2299 Mowry Ave, #3C
Fremont, CA 945381621
(510) 796-7057
fax (510) 796-5198
Credentials & registration
- NPI registered
- November 2005 — 21 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1995 — 31 yrs since
- Specialty taxonomy
- 207V00000X — NUCC code
- State license (1)
- California #A62859
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1396726295. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
68
Distinct HCPCS
2
Medicare allowed
$5,336
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 35 | 25 | $108 | |
G0101 |
Cervical or vaginal cancer screening; pelvic and clinical breast examination | 33 | 33 | $47 |
In context: peer comparison
Among 8 peers in Fremont Obstetrics & Gynecology Physician, average services per provider: 32. This provider delivers 2.1× the peer median.Open Payments
Industry payments received
All-time total
$25
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Hologic Sales and Service, LLC | 1 | $25.18 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
31
Patients
12
Total drug cost
$2,578
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Estradiol | Generic | 18 | 0 | $2,460 |
| Triamcinolone Acetonide | Generic | 13 | 12 | $118 |
Frequently asked questions
What is Dr. Siobhan Calhoun's medical specialty?
Dr. Siobhan Calhoun practices Obstetrics & Gynecology Physician in Fremont, CA.
Where does Dr. Siobhan Calhoun practice?
Dr. Siobhan Calhoun practices at 2299 Mowry Ave, Fremont, CA 945381621. Office phone: 5107967057.
What is Dr. Siobhan Calhoun's NPI?
Dr. Siobhan Calhoun's National Provider Identifier (NPI) is 1396726295, issued by NPPES.
Does Dr. Siobhan Calhoun accept Medicare assignment?
Yes. Dr. Siobhan Calhoun accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Siobhan Calhoun commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Cervical or vaginal cancer screening; pelvic and clinical breast examination (HCPCS G0101). Source: CMS Medicare Physician & Other Practitioners file.