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

Q: 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.

Q: What is Robert Dionisio's specialty?

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

Q: 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 18 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.

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: October 18, 2026.

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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

Phone(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

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

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.

Medicare Billing Reassignments

Medicare enrollment records show Robert Dionisio reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of California San Francisco

0.1 mi

Surgery

400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143

Reassigned Medicare billing, California enrollment
5,645 clinicians in this Medicare group

NPI 1346329380 (415) 353-2161

Ucsf Medical Group Business Services

0.1 mi

Internal Medicine

400 PARNASSUS AVE
San Francisco, CA 94122

Reassigned Medicare billing, California enrollment
5,544 clinicians in this Medicare group

NPI 1477624104 (415) 353-2808

Solano Diagnostics Partners, A Calif Limited Partnership

0.8 mi

Diagnostic Radiology

871 LAWTON ST
San Francisco, CA 94122

Reassigned Medicare billing, California enrollment
88 clinicians in this Medicare group

NPI 1861995425 (559) 455-4009

Bay Imaging Consultants Medical Group Inc

11 mi

Diagnostic Radiology

3100 SAN PABLO AVE STE 330
Berkeley, CA 94702

Reassigned Medicare billing, California enrollment
181 clinicians in this Medicare group

NPI 1982193512 (510) 985-5031

Magnetic Imaging Affiliates, LLC

12 mi

Diagnostic Radiology

5730 TELEGRAPH AVE
Oakland, CA 94609

Reassigned Medicare billing, California enrollment
158 clinicians in this Medicare group

NPI 1487040770 (510) 204-2744

Southern California Permanente Medical Group

248 mi

Health Maintenance Organization

9100 ROSEDALE HWY
Bakersfield, CA 93312

Reassigned Medicare billing, California enrollment
Also billed through NPI 1275756652 (California)
5,228 clinicians in this Medicare group

NPI 1316572753 (877) 608-0044

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

ROXANNA JUAREZ

Radiology (Nuclear Radiology)