DR. GEOFFREY ALAN SIGMUND M.D.
NPI 1710152988
Radiology - Neuroradiology in Orange, CA

Q: What is Geoffrey Sigmund's NPI number?

The NPI number for Geoffrey Sigmund is 1710152988. It was assigned to this individual provider in the NPPES registry on April 28, 2008.

Q: What is Geoffrey Sigmund's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

Q: When was this NPI record last updated?

The NPPES record for Geoffrey Sigmund was last updated on March 18, 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 28, 2008PECOS EnrolledAccepts Medicare Assignment

50/100

CMS Quality Rating

101 THE CITY DR S, UCI MEDICAL CENTER, DEPARTMENT OF RADIOLOGY, ORANGE, CA 92868(714) 456-7890 Get Directions Write a Review

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

Record update history: Mar 18, 2026, Nov 5, 2025 (2 updates tracked since 2025).

On this page

About Dr. Geoffrey Alan Sigmund M.d. NPPES

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

DR. GEOFFREY ALAN SIGMUND M.D. (NPI 1710152988) is an individual neuroradiology provider in Orange, California, licensed in California (A107164) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fresno, and is a graduate of Loma Linda University School Of Medicine (2007).

NPPES Registry Identity

NPI1710152988

Entity TypeIndividualMale

Primary Taxonomy2085N0700X

Provider Legal NameDR. GEOFFREY ALAN SIGMUNDCredential: M.D.

Location Address101 THE CITY DR S, UCI MEDICAL CENTER, DEPARTMENT OF RADIOLOGYOrange, CA 92868-3201

Mailing Address101 The City Dr S, Uci Medical Center, Department Of RadiologyOrange, CA 92868-3201 · (714) 456-7890

Phone(714) 456-7890

Sole ProprietorNo

Medical School CMSLoma Linda University School Of MedicineGraduated 2007

Enumeration DateApril 28, 2008

Last NPPES UpdateMarch 18, 20262 updates tracked since enumeration

NPPES CertifiedMarch 18, 2026

✔ NPI 1710152988 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · NeuroradiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085N0700X

License✔ Licensed in CA · A107164

Definition

A radiologist who diagnoses and treats diseases utilizing imaging procedures as they relate to the brain, spine and spinal cord, head, neck and organs of special sense in adults and children.

Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License A107164 (CA)

101 THE CITY DR S, Orange, CA 92868

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Secondary Practice Location 1

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

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

Dr. Geoffrey Alan Sigmund 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 ID840424206

PECOS Enrollment IDI20131018000277

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

Coastal Imaging And Intervention Inc

5.1 mi

Vascular & Interventional Radiology

1111 W LA PALMA AVE
Anaheim, CA 92801

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

NPI 1528860459 (714) 999-3847

Memorialcare Medical Foundation

6.4 mi

Clinic/Center

17360 BROOKHURST ST
Fountain Valley, CA 92708

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

NPI 1205167350 (877) 696-3622

Newport Diagnostic Center Inc

12 mi

Radiology

1605 AVOCADO
Newport Beach, CA 92660

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

NPI 1932117249 (949) 760-3025

Newport Diagnostic Radiology, Inc

12 mi

Diagnostic Radiology

1605 AVOCADO AVE
Newport Beach, CA 92660

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

NPI 1134345473 (949) 760-3025

Renaissance Imaging Medical Associates, Inc.

48 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

Southern Inyo Healthcare District

195 mi

Rural Health

510 E. LOCUST
Lone Pine, CA 93545

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

NPI 1063589174 (760) 876-1146

Saint Agnes Medical Foundation

236 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

Radiology Of Indiana P C

1,805 mi

Diagnostic Radiology

9998 CROSSPOINT BLVD STE 200
Indianapolis, IN 46256

Reassigned Medicare billing, California and Indiana enrollments
9 clinicians in this Medicare group

NPI 1992723829 (317) 806-8260

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 40

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.

Injection, gadobutrol, 0.1 ml A9585

Gadobutrol is a contrast agent used during MRI scans to help provide clearer images. It's injected into your vein before the scan. This helps doctors to see certain areas more clearly for better diagnosis. It's generally safe with few side effects.

15,782 services228 patients

Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967

Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.

3,640 services79 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.

412 services400 patients

Mri scan of leg joint without contrast 73721

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

333 services299 patients

Mri scan of arm joint without contrast 73221

An MRI scan of the arm joint is a non-invasive imaging procedure that uses magnetic fields and radio waves to create detailed images of the structures within your arm joint. No contrast dye is used in this process. It helps to diagnose or monitor conditions like arthritis, injuries, or infections.

245 services226 patients

Mri scan of upper spinal canal without contrast 72141

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

189 services185 patients

Injection, midazolam hydrochloride, per 1 mg J2250

Midazolam hydrochloride is a medication injected to help you relax or sleep before surgery or certain medical procedures. It works by calming the brain and nerves. It's given in small doses, measured in milligrams (mg).

149 services56 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.

138 services117 patients

Mri scan of middle spinal canal without contrast 72146

An MRI scan of the middle spinal canal without contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. This helps doctors identify any abnormalities or issues in your spinal canal. No dye is used in this procedure.

122 services118 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.

90 services84 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.

61 services57 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.

57 services56 patients

Complete ultrasound scan of pelvis 76856

A complete ultrasound scan of the pelvis is a safe, non-invasive imaging procedure. It uses sound waves to create pictures of your lower abdomen area, helping doctors to evaluate and diagnose any potential issues. It's painless and usually takes about 30 minutes.

52 services51 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.

51 services50 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.

50 services49 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.

48 services44 patients

Mri scan of leg without contrast 73718

An MRI scan of the leg without contrast is a non-invasive imaging procedure. It uses a magnetic field and radio waves to create detailed images of the structures in your leg, such as bones, muscles, and blood vessels. No contrast dye is used.

46 services41 patients

Mri scan of arm joint with contrast 73222

An MRI scan of your arm joint with contrast is a non-invasive imaging test. A safe dye is injected into your body to enhance the visibility of tissues and structures. It helps doctors diagnose conditions such as arthritis, tumors, or injuries. The procedure is painless.

44 services42 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.

43 services40 patients

Review by radiologist of ct guidance for needle placement 77012

This process involves a radiologist examining CT scan images to accurately guide a needle's placement within the body. This technique is often used for biopsies or treatments, ensuring precision and safety.

37 services36 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.

35 services34 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.

34 services33 patients

Ct scan of arm without contrast 73200

A CT scan of the arm without contrast is a non-invasive imaging test. It uses X-ray technology to capture detailed images of your arm's structures. It doesn't involve any contrasting dye, hence, minimal preparation is required. It helps in diagnosing injuries or conditions affecting the arm.

34 services29 patients

Injection of contrast for imaging of shoulder joint 23350

This procedure involves injecting a contrast agent into your shoulder joint. The contrast helps highlight the joint on an imaging scan, giving a clearer picture of its condition. It can help identify any abnormalities or injuries. It's generally safe with minimal discomfort.

29 services28 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.

28 services27 patients

Single contrast x-ray of upper digestive tract 74240

A single contrast x-ray of the upper digestive tract is a diagnostic procedure that uses a special dye and x-rays to see how your digestive system is functioning. It helps in detecting abnormalities or diseases in your esophagus, stomach, and the first part of your small intestine.

27 services26 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.

27 services25 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.

27 services26 patients

Mri scan of pelvis without contrast 72195

An MRI scan of the pelvis without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of the lower part of your body. This helps doctors to identify any abnormalities or issues in that area.

24 services23 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.

24 services22 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.

23 services22 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.

23 services23 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

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.

20 services18 patients

Mri scan of leg joint with contrast 73722

An MRI scan of a leg joint with contrast is a non-invasive procedure that uses a magnetic field and radio waves to create detailed images of your leg joint. A contrast dye is injected to enhance the visibility of certain tissues, helping doctors diagnose conditions more accurately.

20 services19 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.

17 services17 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

16 services16 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.

14 services13 patients

Ct scan of middle spine without contrast 72128

A CT scan of the middle spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your mid-spine area. This scan helps doctors identify issues like fractures, tumors, or infections. No dye is used in this procedure.

13 services12 patients

Mri scan of arm without contrast 73218

An MRI scan of the arm without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of the structures within your arm. This procedure helps in diagnosing injuries or diseases affecting muscles, bones, and joints.

13 services13 patients

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.

50/100

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

Scored as part of a group practice

Quality

Improvement Activities

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.

DR. ANKIT BHUPENDRA PATEL D.O.

Radiology (Diagnostic Radiology)

101 THE CITY DR S
ORANGE, CA 92868

Orange County (714) 456-5113

DR. LAURA CATHERINE SKOCZYLAS MD

Obstetrics & Gynecology

101 THE CITY DR S, BUILDING 56, DEPARTMENT OF OB/GYN
ORANGE, CA 92868

Orange County (714) 456-8224

MICHAEL CHENG DO

Internal Medicine (Rheumatology)

101 THE CITY DR S
ORANGE, CA 92868

Orange County (714) 456-7110

AESTHETIC AND PLASTIC SURGERY INSTITUTE

Plastic Surgery

101 THE CITY DR S
ORANGE, CA 92868

Orange County (714) 456-2986

JOSEPH VILLARREAL M.D.

Emergency Medicine

101 THE CITY DR S, BUILDING 1A, ROOM 1009
ORANGE, CA 92868

Orange County (714) 456-5239

DEMI TRAN

Psychiatry & Neurology (Neurology)

101 THE CITY DR S, CITY TOWER, SUITE 400
ORANGE, CA 92868

Orange County (171) 456-6693

DR. ISABEL CARLTON CLARK M.D.

Surgery (Trauma Surgery)

101 THE CITY DR S
ORANGE, CA 92868

Orange County (714) 456-7890

DYLAN LUKATO

Emergency Medicine

101 THE CITY DR S
ORANGE, CA 92868

Orange County (415) 218-8041

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 Geoffrey Sigmund's NPI number?

The NPI number for Geoffrey Sigmund is 1710152988. It was assigned to this individual provider in the NPPES registry on April 28, 2008.

Where is Geoffrey Sigmund located?

Geoffrey Sigmund practices at 101 The City Dr S Uci Medical Center, Department Of Radiology, Orange, CA 92868. The listed phone number is (714) 456-7890.

What is Geoffrey Sigmund's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

Is Geoffrey Sigmund enrolled in Medicare?

Yes. Geoffrey Sigmund 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 Geoffrey Sigmund's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Geoffrey Sigmund reassigns Medicare benefits to 8 organizations: Coastal Imaging And Intervention Inc (Anaheim, CA), Memorialcare Medical Foundation (Fountain Valley, CA), Newport Diagnostic Center Inc (Newport Beach, CA), Newport Diagnostic Radiology, Inc (Newport Beach, CA), Renaissance Imaging Medical Associates, Inc. (Northridge, CA) 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 Geoffrey Sigmund's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Geoffrey Sigmund accept?

Health plans from CareSource list Geoffrey Sigmund 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.

When was this NPI record last updated?

The NPPES record for Geoffrey Sigmund was last updated on March 18, 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.