JULIANNE O'CALLAHAN MD
NPI 1932158805
Obstetrics & Gynecology in Redwood City, CA

Q: What is Julianne O'callahan's NPI number?

The NPI number for Julianne O'callahan is 1932158805. It was assigned to this individual provider in the NPPES registry on May 9, 2006.

Q: What is Julianne O'callahan's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Active since May 09, 2006PECOS EnrolledAccepts Medicare Assignment

2950 WHIPPLE AVE, REDWOOD CITY, CA 94062(650) 366-4633 Get Directions Write a Review

NPPES record last updated: May 26, 2020. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Julianne O'callahan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JULIANNE O'CALLAHAN MD (NPI 1932158805) is an individual obstetrics & gynecology provider in Redwood City, California, licensed in California (G79159) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (1992).

NPPES Registry Identity

NPI1932158805

Entity TypeIndividualFemale

Primary Taxonomy207V00000X

Provider Legal NameJULIANNE O'CALLAHANCredential: MD

Location Address2950 WHIPPLE AVERedwood City, CA 94062-2850

Mailing Address325 Distel CirLos Altos, CA 94022-1408 · (650) 366-4633

Phone(650) 366-4633

Sole ProprietorNo

Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 1992

Enumeration DateMay 9, 2006

Last NPPES UpdateMay 26, 2020

NPPES CertifiedMay 26, 2020

✔ NPI 1932158805 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in CA · G79159

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

2950 WHIPPLE AVE, Redwood City, CA 94062

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Julianne O'callahan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9234147588

PECOS Enrollment IDI20060328000248

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit, 20-29 minutes 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

15 services11 patients

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101

This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.

14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94062 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. RONALD HEINZ HENNEFARTH DDS

Dentist (General Practice)

2950 WHIPPLE AVE, SUITE NUMBER 9
REDWOOD CITY, CA 94062

San Mateo County (650) 368-6333

MARIAN KIM MD

Obstetrics & Gynecology

2950 WHIPPLE AVE, SUITE 8
REDWOOD CITY, CA 94062

San Mateo County (650) 364-2142

CYNTHIA STRICKLIN NP

Nurse Practitioner (Women's Health)