Doctor profile · Federal record
Dr. Julianne O'Callahan, MD
Obstetrics & Gynecology Physician (CMS: Obstetrics/Gynecology) · Redwood City, CA
- NPI 1932158805
- Accepts Medicare
- 34 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2950 Whipple Ave
Redwood City, CA 940622850
(650) 366-4633 - Mailing address
-
325 Distel Cir
Los Altos, CA 940221408
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- May 26, 2020
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207V00000X — NUCC code
- State license (1)
- California #G79159
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1932158805. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
24
Distinct HCPCS
1
Medicare allowed
$2,616
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 24 | 17 | $109 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 44. This provider delivers 0.5× the peer median.Open Payments
Industry payments received
All-time total
$16
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Organon Llc | 1 | $16.36 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
34
Patients
0
Total drug cost
$1,564
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Valacyclovir (Valacyclovir Hcl) | Brand | 18 | 0 | $418 |
| Estradiol | Generic | 16 | 0 | $1,146 |
Hospital affiliations
Frequently asked questions
What is Dr. Julianne O'Callahan's medical specialty?
Dr. Julianne O'Callahan practices Obstetrics & Gynecology Physician in Redwood City, CA.
Where does Dr. Julianne O'Callahan practice?
Dr. Julianne O'Callahan practices at 2950 Whipple Ave, Redwood City, CA 940622850. Office phone: 6503664633.
What is Dr. Julianne O'Callahan's NPI?
Dr. Julianne O'Callahan's National Provider Identifier (NPI) is 1932158805, issued by NPPES.
Does Dr. Julianne O'Callahan accept Medicare assignment?
Yes. Dr. Julianne O'Callahan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Julianne O'Callahan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.