JOHN STEPHEN SOWINSKI MD
NPI 1881190627
Radiology - Diagnostic Radiology in San Francisco, CA

Q: What is John Sowinski's NPI number?

The NPI number for John Sowinski is 1881190627. It was assigned to this individual provider in the NPPES registry on April 2, 2018.

Q: What is John Sowinski'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 John Sowinski was last updated on March 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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 April 02, 2018PECOS EnrolledAccepts Medicare Assignment

91.85/100

CMS Quality Rating

505 PARNASSUS AVE, SAN FRANCISCO, CA 94143(415) 502-2673 Get Directions Write a Review

NPPES record last updated: March 19, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 19, 2026, May 1, 2024, Jun 21, 2023 and 2 more (5 updates tracked since 2020).

On this page

About John Stephen Sowinski Md NPPES

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

JOHN STEPHEN SOWINSKI MD (NPI 1881190627) is an individual diagnostic radiology provider in San Francisco, California, licensed in California (A187039) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS, is affiliated with Parrish Medical Center, and maintains a secondary practice location in San Francisco.

NPPES Registry Identity

NPI1881190627

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameJOHN STEPHEN SOWINSKICredential: MD

Location Address505 PARNASSUS AVESan Francisco, CA 94143-2204

Mailing AddressPo Box 743749Los Angeles, CA 90074-3749

Phone(415) 502-2673

Sole ProprietorNo

Medical School CMSIndiana University School Of MedicineGraduated 2018

Enumeration DateApril 2, 2018

Last NPPES UpdateMarch 19, 20265 updates tracked since enumeration

NPPES CertifiedMarch 19, 2026

✔ NPI 1881190627 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in CA · A187039✔ Licensed in NC · 2026-00784

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

505 PARNASSUS AVE, San Francisco, CA 94143

Open in Google Maps ↗

Secondary Practice Location 1

Location 11001 Potrero Avenue, Bldg. 5, 1st Fl.San Francisco, CA 94110 · Phone (628) 206-8020

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

John Stephen Sowinski 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 ID7214279827

PECOS Enrollment IDI20240813002557, I20260330000273, I20260523000222

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 John Sowinski reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Memorial Health Partners Foundation, Inc

2,071 mi

Internal Medicine

5600 BRAINERD RD, SUITE 500
Chattanooga, TN 37411

Reassigned Medicare billing, New York enrollment

NPI 1922053545 (423) 495-6870

Radiology Associates Of South Carolina LLC

2,227 mi

Diagnostic Radiology

1 SAINT FRANCIS DR
Greenville, SC 29601

Reassigned Medicare billing, New York enrollment
7 clinicians in this Medicare group

NPI 1083491906 (877) 224-8003

Pennsylvania Radiology Associates PC

2,330 mi

Diagnostic Radiology

600 SOMERSET AVE
Windber, PA 15963

Reassigned Medicare billing, New York enrollment
4 clinicians in this Medicare group

NPI 1184443921 (877) 224-8003

Southeastern Regional Medical Center

2,399 mi

Clinic/Center

22401 ANDREW JACKSON HWY
Maxton, NC 28364

Reassigned Medicare billing, North Carolina enrollment
66 clinicians in this Medicare group

NPI 1215267125 (910) 272-3051

Florida Radiology Associates LLC

2,409 mi

Diagnostic Radiology

600 E DIXIE AVE
Leesburg, FL 34748

Reassigned Medicare billing, New York enrollment
3 clinicians in this Medicare group

NPI 1497510978 (747) 924-9005

Edison Radiology Group PA Jfk Medical Center

2,559 mi

Diagnostic Radiology

65 JAMES ST
Edison, NJ 08820

Reassigned Medicare billing, New Jersey enrollment
22 clinicians in this Medicare group

NPI 1417013731 (732) 287-1702

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 24

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 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.

362 services307 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

93 services92 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

84 services82 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

83 services80 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

80 services79 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.

51 services51 patients

Nuclear medicine study from skull base to mid-thigh with ct scan 78815

A nuclear medicine study from skull base to mid-thigh with a CT scan involves using a small amount of radioactive material and CT imaging to examine body tissues and organs. This helps detect any abnormalities by providing detailed images of the body's internal structure.

50 services49 patients

Complete ultrasound scan of abdomen 76700

A complete ultrasound scan of the abdomen is a non-invasive imaging procedure. It uses sound waves to produce images of the organs in your abdomen, such as the liver, gallbladder, spleen, pancreas, and kidneys. It helps in diagnosing, monitoring, and planning treatments.

47 services47 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

40 services40 patients

Mri scan of pelvis before and after contrast 72197

An MRI scan of the pelvis before and after contrast is a non-invasive imaging technique. It uses magnetic fields and radio waves to capture detailed images of your lower abdomen. Contrast dye, safe for the body, improves image clarity. This helps detect abnormalities more accurately.

39 services39 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

38 services37 patients

3d radiographic procedure 76376

A 3D radiographic procedure is a non-invasive imaging test that helps doctors visualize the internal structures of your body in three dimensions. This advanced technology provides detailed images, aiding in accurate diagnosis and treatment planning. It involves exposure to minimal radiation.

34 services34 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

31 services31 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

24 services24 patients

Ultrasound scan of head and neck soft tissue 76536

An ultrasound scan of the head and neck soft tissue is a non-invasive procedure that uses sound waves to create images of the soft tissues in these areas. It helps identify any abnormalities or issues, such as tumors, cysts, or infections. It's painless and doesn't involve radiation.

23 services23 patients

Mri scan of abdomen before and after contrast 74183

An MRI scan of the abdomen before and after contrast provides detailed images of your abdominal organs. Initially, images are taken without a contrast agent. Then, a safe dye is administered, usually via an IV, to highlight certain areas, giving a clearer picture to help diagnose various conditions.

22 services22 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

19 services15 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

19 services18 patients

Ultrasound of abdomen and pelvis artery and vein blood flow 93976

An ultrasound of your abdomen and pelvis arteries and veins is a non-invasive procedure that uses sound waves to create images of your blood vessels. This helps in assessing the flow of blood, identifying blockages, or detecting other abnormalities. It's a safe, painless process.

19 services19 patients

Imaging for evaluation of swallowing function 74230

This process, known as a swallowing study, uses imaging technology to view how food and liquid move from your mouth to your stomach. It helps identify any issues you may have swallowing, which can be crucial for determining the best treatment plan.

17 services17 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

16 services14 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

14 services12 patients

Ct scan of blood vessels of abdomen and pelvis with contrast 74174

A CT scan of the abdomen and pelvis with contrast is a medical imaging procedure. A special dye, called contrast, is used to make blood vessels more visible. The scan produces detailed images of your abdomen and pelvis, helping doctors to diagnose conditions or plan treatments.

14 services13 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Parrish Medical Center

Acute Care Hospitals · Titusville, FL

2/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number100028

Location951 N Washington AveTitusville, FL 32796 · Brevard County

Emergency services Birthing friendly

Jfk Medical Center

Acute Care Hospitals · Edison, NJ

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310108

Location65 James StreetEdison, NJ 08820 · Middlesex County

Emergency services Birthing friendly

Southeastern Regional Medical Center

Acute Care Hospitals · Lumberton, NC

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number340050

Location300 W 27 St PO Box 1408Lumberton, NC 28359 · Robeson County

Emergency services Birthing friendly

Wooster Community Hospital

Acute Care Hospitals · Wooster, OH

5/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number360036

Location1761 Beall AvenueWooster, OH 44691 · Wayne County

Emergency services Birthing friendly

Memorial Healthcare System, Inc

Acute Care Hospitals · Chattanooga, TN

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number440091

Location2525 Desales AveChattanooga, TN 37404 · Hamilton County

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.85/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

83.53

Promoting Interoperability

100

Improvement Activities

Cost

68.01

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.

CATHERINE RAMSDELL NNP

Nurse Practitioner (Neonatal)

505 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-1000

DR. CLAUDIO ANDRES BRAVO CARRILLO M.D.

Internal Medicine (Advanced Heart Failure and Transplant Cardiology)

505 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 502-4243

MAURICIO JALIFE BUCAY M.D

Hospitalist

505 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 750-4994

EMMA B SHAK M.D.

Student in an Organized Health Care Education/Training Program

505 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1528

DR. ADRIANA A.T. MARTIN M.D., PH.D.

Internal Medicine

505 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 514-7288

WILLIAM JAMES DEARDORFF

Internal Medicine (Geriatric Medicine)

505 PARNASSUS AVE, 15 LONG
SAN FRANCISCO, CA 94143

San Francisco County (415) 406-1417

KEERTHANA REDDY BANALA

Student in an Organized Health Care Education/Training Program

505 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 514-7288

ROBERT CHRISTIAN WENZ

Nurse Anesthetist, Certified Registered

505 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-8054

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 John Sowinski's NPI number?

The NPI number for John Sowinski is 1881190627. It was assigned to this individual provider in the NPPES registry on April 2, 2018.

Where is John Sowinski located?

John Sowinski practices at 505 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 502-2673.

What is John Sowinski's specialty?

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

Is John Sowinski enrolled in Medicare?

Yes. John Sowinski 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.

Which organizations bill Medicare for John Sowinski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Sowinski reassigns Medicare benefits to 6 organizations: Memorial Health Partners Foundation, Inc (Chattanooga, TN), Radiology Associates Of South Carolina LLC (Greenville, SC), Pennsylvania Radiology Associates PC (Windber, PA), Southeastern Regional Medical Center (Maxton, NC), Florida Radiology Associates LLC (Leesburg, FL) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Sowinski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is John Sowinski affiliated with any hospitals?

According to CMS data, John Sowinski is affiliated with Parrish Medical Center, Jfk Medical Center, Southeastern Regional Medical Center, Wooster Community Hospital and Memorial Healthcare System, Inc.

When was this NPI record last updated?

The NPPES record for John Sowinski was last updated on March 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.