IAN K TSENG M.D.
NPI 1689949257
Radiology - Diagnostic Radiology in Irvine, CA

Q: What is Ian Tseng's NPI number?

The NPI number for Ian Tseng is 1689949257. It was assigned to this individual provider in the NPPES registry on March 15, 2012.

Q: What is Ian Tseng'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 Ian Tseng was last updated on March 25, 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 15, 2012PECOS EnrolledAccepts Medicare Assignment

95.89/100

CMS Quality Rating

17595 HARVARD AVE STE C, IRVINE, CA 92614(949) 870-9996 Get Directions Write a Review

NPPES record last updated: March 25, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 25, 2025, Aug 2, 2019 (2 updates tracked since 2019).

On this page

About Ian K Tseng M.d. NPPES

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

IAN K TSENG M.D. (NPI 1689949257) is an individual diagnostic radiology provider in Irvine, California, licensed in New Jersey (25MA09270800) and active in the NPI registry since March 2012. He is enrolled in Medicare PECOS, is affiliated with Methodist Hospitals Inc, and maintains a secondary practice location in Fresno.

NPPES Registry Identity

NPI1689949257

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameIAN K TSENGCredential: M.D.

Location Address17595 HARVARD AVE STE CIrvine, CA 92614

Mailing Address17595 Harvard Ave Ste CIrvine, CA 92614-8522 · (949) 870-9996

Phone(949) 870-9996

Sole ProprietorNo

Medical School CMSMiami Medical CollegeGraduated 2007

Enumeration DateMarch 15, 2012

Last NPPES UpdateMarch 25, 20252 updates tracked since enumeration

NPPES CertifiedMarch 25, 2025

✔ NPI 1689949257 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in NJ · 25MA09270800✔ Licensed in CA · A129394

Definition

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

17595 HARVARD AVE STE C, Irvine, CA 92614

Open in Google Maps ↗

Secondary Practice Location 1

Location 11510 E Herndon Ave Ste 110Fresno, CA 93720-3333 · Phone (559) 450-6742 · Fax (559) 450-6743

Other Identifiers 2

Medicaid0347558NJ

Medicaid03583906NY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource.Insurance ›

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

Ian K Tseng M.d. 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 ID7113165788

PECOS Enrollment IDI20150402000818, I20250826000617

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 Ian Tseng reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Renaissance Imaging Medical Associates, Inc.

55 mi

Diagnostic Radiology

18436 ROSCOE BLVD
Northridge, CA 91325

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

NPI 1487608931 (818) 435-1400

Saint Agnes Medical Foundation

244 mi

Internal Medicine

1303 E HERNDON AVE, SUITE 850
Fresno, CA 93720

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

NPI 1558819482 (559) 450-5611

Forefront Radiology Medical Group PC

244 mi

Diagnostic Radiology

1303 E HERNDON AVE
Fresno, CA 93720

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

NPI 1689232449 (559) 420-3000

Golden State Imaging Associates Inc

1,348 mi

Diagnostic Radiology

1401 ST JOSEPH PKWY
Houston, TX 77002

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

NPI 1144872052 (888) 371-0667

N W Indiana Radiology Services, PC

1,748 mi

Body Imaging

8701 BROADWAY
Merrillville, IN 46410

Reassigned Medicare billing, Indiana enrollment
17 clinicians in this Medicare group

NPI 1386693364 (219) 738-5565

Pulaski Memorial Hospital

1,767 mi

Rural Health

112 E MONTGOMERY ST
Francesville, IN 47946

Reassigned Medicare billing, Indiana enrollment
Also billed through NPI 1306928213 (Indiana)
63 clinicians in this Medicare group

NPI 1245710086 (219) 567-2223

St Lawrence Radiology Assoc PC

2,391 mi

Diagnostic Radiology

50 LEROY ST, CANTON POTSDAM HOSPITAL
Potsdam, NY 13676

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

NPI 1154380863 (315) 782-2620

Maritime Radiology Associates PC

2,707 mi

Diagnostic Radiology

194 E MAIN ST
Fort Kent, ME 04743

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

NPI 1760628358 (207) 834-3155

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 25

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.

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.

443 services405 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.

367 services346 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.

166 services157 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

154 services145 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.

140 services135 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.

130 services110 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.

77 services75 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

62 services58 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

62 services58 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

58 services57 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.

56 services56 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

54 services53 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.

53 services52 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

35 services33 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

29 services29 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.

28 services28 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

25 services25 patients

Ct scan of pelvis without contrast 72192

A CT scan of the pelvis without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your lower abdomen area. It helps in detecting issues like injuries, inflammation, or abnormal growths. It doesn't involve any dye injection.

23 services22 patients

Ct scan of leg without contrast 73700

A CT scan of the leg is a non-invasive imaging test that uses X-rays to capture detailed images of your leg's bones, muscles, and blood vessels. It doesn't use contrast dye and doesn't cause any pain. It helps in diagnosing injuries or diseases.

22 services19 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.

20 services20 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

17 services17 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.

13 services13 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

12 services12 patients

Mri scan of lower spinal canal before and after contrast 72158

An MRI scan of the lower spinal canal with contrast is a non-invasive imaging procedure. It uses magnetic fields to generate detailed images of your lower spine. A contrast agent is injected to enhance these images, helping doctors see issues more clearly.

12 services12 patients

Mri scan of abdomen without contrast 74181

An MRI scan of the abdomen without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of your abdominal organs. This procedure doesn't involve radiation or dye injection.

12 services12 patients

Hospital Affiliations CMS Care Compare

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

Methodist Hospitals Inc

Acute Care Hospitals · Gary, IN

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150002

Location600 Grant StGary, IN 46402 · Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92614 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

$96.36 typical visit price

range $62.96 – $187.60

Typical copayment $24.09 (range $15.74 – $46.90)

Most-billed visit code 99203

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

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.

95.89/100

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

Scored as part of a group practice

Quality

100

Improvement Activities

Cost

66.1

Other Providers at the Same Location NPPES 2

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

MR. FORTUNATO DAVID AZOULAY M.P.T.

Physical Therapist

17595 HARVARD AVE STE C
IRVINE, CA 92614

Orange County (949) 233-1980

TWILA B. CLARK PH.D.

Psychologist (Clinical)

17595 HARVARD AVE STE C
IRVINE, CA 92614

Orange County (714) 615-9308

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 Ian Tseng's NPI number?

The NPI number for Ian Tseng is 1689949257. It was assigned to this individual provider in the NPPES registry on March 15, 2012.

Where is Ian Tseng located?

Ian Tseng practices at 17595 Harvard Ave Ste C, Irvine, CA 92614. The listed phone number is (949) 870-9996.

What is Ian Tseng's specialty?

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

Is Ian Tseng enrolled in Medicare?

Yes. Ian Tseng 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 Ian Tseng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ian Tseng reassigns Medicare benefits to 8 organizations: Renaissance Imaging Medical Associates, Inc. (Northridge, CA), Saint Agnes Medical Foundation (Fresno, CA), Forefront Radiology Medical Group PC (Fresno, CA), Golden State Imaging Associates Inc (Houston, TX), N W Indiana Radiology Services, PC (Merrillville, IN) and 3 more organizations, 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 Ian Tseng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ian Tseng accept?

Health plans from CareSource list Ian Tseng as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Ian Tseng affiliated with any hospitals?

According to CMS data, Ian Tseng is affiliated with Methodist Hospitals Inc.

When was this NPI record last updated?

The NPPES record for Ian Tseng was last updated on March 25, 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.