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DR. CATHERINE DIEFFENBACH MD
NPI 1861810673
Obstetrics & Gynecology in San Diego, CA

Active since March 31, 2014PECOS EnrolledAccepts Medicare Assignment
9339 GENESEE AVENUE, SUITE 220, SAN DIEGO, CA 92121(858) 455-7520(858) 455-5461 Get Directions Write a Review

NPPES record last updated: April 16, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Apr 16, 2024, Mar 8, 2021, Sep 19, 2019 and 1 more (4 updates tracked since 2016).

About Dr. Catherine Dieffenbach Md NPPES

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

DR. CATHERINE DIEFFENBACH MD (NPI 1861810673) is an individual obstetrics & gynecology provider in San Diego, California, licensed in California (C187220) and active in the NPI registry since March 2014. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (2014).

NPPES Registry Identity

NPI1861810673
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. CATHERINE DIEFFENBACHCredential: MD
Location Address9339 GENESEE AVENUE, SUITE 220San Diego, CA 92121-2196
Mailing Address9339 Genesee Avenue, Suite 220San Diego, CA 92121-2196 · (858) 455-7520 · Fax (858) 455-5461
Phone(858) 455-7520
Fax(858) 455-5461
Sole ProprietorNo
Medical School CMSUniversity Of California, San Diego School Of MedicineGraduated 2014
Enumeration DateMarch 31, 2014
Last NPPES UpdateApril 16, 20244 updates tracked since enumeration
NPPES CertifiedApril 16, 2024
✔ NPI 1861810673 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 · C187220
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.

9339 GENESEE AVENUE, San Diego, CA 92121
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Other Names 1

Former Name (1)Catherine Gordon Md

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

Dr. Catherine Dieffenbach 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 ID1153651187
PECOS Enrollment IDI20240104003962
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 7

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 with low level od decision making, if using time, 20 minutes or more 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.
31 services23 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.
17 services17 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
15 services14 patients
Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina 76830
An ultrasound scan of the lower abdominal region is a safe, non-invasive procedure that uses sound waves to create images of internal structures. This helps in checking the health of reproductive organs and detecting any abnormalities. The scan is done via a small probe inserted into the body.
14 services13 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
12 services12 patients
Screening 3d breast mammography 77063
Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92121 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
$140.22 typical visit price
range $62.10 – $184.71
Typical copayment $35.05 (range $15.52 – $46.17)
Most-billed visit code 99204
Established Patient
$76.87 typical visit price
range $20.62 – $151.42
Typical copayment $19.21 (range $5.15 – $37.85)
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

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

IGO MEDICAL GROUP AMC
Obstetrics & Gynecology
9339 GENESEE AVENUE, SUITE 220
SAN DIEGO, CA 92121
San Diego County (858) 455-7520

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Catherine Dieffenbach's NPI number?

The NPI number for Catherine Dieffenbach is 1861810673. It was assigned to this individual provider in the NPPES registry on March 31, 2014. The provider is also known as Catherine Gordon MD.

Where is Catherine Dieffenbach located?

Catherine Dieffenbach practices at 9339 Genesee Avenue Suite 220, San Diego, CA 92121. The listed phone number is (858) 455-7520.

What is Catherine Dieffenbach's specialty?

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

Is Catherine Dieffenbach enrolled in Medicare?

Yes. Catherine Dieffenbach is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Catherine Dieffenbach was last updated on April 16, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.