ROBERT G DIONISIO MD
NPI 1629539754
Radiology - Diagnostic Radiology in San Francisco, CA

Active since March 29, 2019PECOS EnrolledAccepts Medicare Assignment
505 PARNASSUS AVE FL 3, SAN FRANCISCO, CA 94143(415) 353-2887 Get Directions Write a Review

NPPES record last updated: April 18, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Robert G Dionisio Md NPPES

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

ROBERT G DIONISIO MD (NPI 1629539754) is an individual diagnostic radiology provider in San Francisco, California, licensed in California (A176855) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1629539754
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameROBERT G DIONISIOCredential: MD
Location Address505 PARNASSUS AVE FL 3San Francisco, CA 94143-2204
Mailing Address505 Parnassus Ave Fl 3San Francisco, CA 94143-2204 · (415) 353-2887
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateMarch 29, 2019
Last NPPES UpdateApril 18, 2025
NPPES CertifiedApril 18, 2025
NPI 1629539754 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License Licensed in CA · A176855
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
505 PARNASSUS AVE FL 3, San Francisco, CA 94143

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

Robert G Dionisio 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 ID6608101175
PECOS Enrollment IDI20240709004913
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 6

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.

X-ray for bone length assessment 77073
An X-ray for bone length assessment is a simple, non-invasive imaging test. It helps to evaluate the length of your bones and identify any discrepancies or abnormalities. This procedure is quick, painless, and provides valuable information for your healthcare provider.
45 services44 patients
3d radiographic procedure with computerized image postprocessing 76377
A 3D radiographic procedure with computerized image postprocessing is a high-tech imaging test. It uses X-rays to create detailed 3D images of the body. The computerized postprocessing further enhances these images for more precise diagnosis and treatment planning.
44 services43 patients
X-ray of chest, 1 view 71045
A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.
21 services20 patients
X-ray of lower and sacral spine, 2-3 views 72100
An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.
16 services16 patients
X-ray of lower and sacral spine, minimum of 4 views 72110
An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.
13 services12 patients
Ct scan head or brain without contrast 70450
A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
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 20

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

Radiology (Nuclear Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143
Radiology (Diagnostic Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143
Radiology (Diagnostic Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143
Radiology (Diagnostic Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143
Radiology (Diagnostic Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143
Radiology (Diagnostic Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143
Radiology (Diagnostic Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143
Radiology (Pediatric Radiology)
505 PARNASSUS AVE FL 3
SAN FRANCISCO, CA 94143

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 Robert Dionisio's NPI number?

The NPI number for Robert Dionisio is 1629539754. It was assigned to this individual provider in the NPPES registry on March 29, 2019.

Where is Robert Dionisio located?

Robert Dionisio practices at 505 Parnassus Ave Fl 3, San Francisco, CA 94143. The listed phone number is (415) 353-2887.

What is Robert Dionisio's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Robert Dionisio enrolled in Medicare?

Yes. Robert Dionisio 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 Robert Dionisio was last updated on April 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.