DIANNA CHOOLJIAN MD PHD MPH
NPI 1902888043
Radiology - Neuroradiology in Long Beach, CA

Q: What is Dianna Chooljian's NPI number?

The NPI number for Dianna Chooljian is 1902888043. It was assigned to this individual provider in the NPPES registry on November 15, 2005.

Q: What is Dianna Chooljian'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 Dianna Chooljian was last updated on April 20, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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 November 15, 2005PECOS EnrolledAccepts Medicare Assignment

2801 ATLANTIC AVE, LONG BEACH, CA 90806(562) 933-1550 Get Directions Write a Review

NPPES record last updated: April 20, 2009. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dianna Chooljian Md Phd Mph NPPES

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

DIANNA CHOOLJIAN MD PHD MPH (NPI 1902888043) is an individual neuroradiology provider in Long Beach, California, licensed in California (G57579) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS, is affiliated with Maui Memorial Medical Center, and is a graduate of Uniformed Services Uhs Fe Hebert School Of Med (1983).

NPPES Registry Identity

NPI1902888043

Entity TypeIndividualFemale

Primary Taxonomy2085N0700X

Provider Legal NameDIANNA CHOOLJIANCredential: MD PHD MPH

Location Address2801 ATLANTIC AVELong Beach, CA 90806

Mailing Address1724 Paseo Del MarPve, CA 90274 · (310) 373-5192 · Fax (310) 373-5192

Phone(562) 933-1550

Sole ProprietorNo

Medical School CMSUniformed Services Uhs Fe Hebert School Of MedGraduated 1983

Enumeration DateNovember 15, 2005

Last NPPES UpdateApril 20, 2009

✔ NPI 1902888043 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 · G57579

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 G57579 (CA)

2801 ATLANTIC AVE, Long Beach, CA 90806

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Other Identifiers 4

Medicare PINBK770Z

Other00G575790CA · Medical

Medicare UPINF36820

Medicare UPINWG57579HCA

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

Dianna Chooljian Md Phd Mph 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 ID3072553031

PECOS Enrollment IDI20050509001049

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 Dianna Chooljian reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Torrance Memorial Medical Center

9.0 mi

Diagnostic Radiology

3330 LOMITA BLVD
Torrance, CA 90505

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

NPI 1477502797 (310) 325-9110

Healthcare Partners Affiliates Medical Group

17 mi

Internal Medicine

1120 W WASHINGTON BLVD
Los Angeles, CA 90015

Reassigned Medicare billing, California enrollment
2,052 clinicians in this Medicare group

NPI 1659312593 (213) 623-2225

Renaissance Imaging Medical Associates, Inc.

35 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

Palms Imaging Medical Group

62 mi

Diagnostic Radiology

1901 OUTLET CENTER DRIVE
Oxnard, CA 93036

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

NPI 1851347272 (805) 604-9500

Southern Inyo Healthcare District

193 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

Silicon Valley Diagnostic Imaging, Inc.

329 mi

Radiology

2500 GRANT RD
Mountain View, CA 94040

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

NPI 1629265806 (650) 940-7000

Golden State Imaging Associates Inc

1,369 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

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 16

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.

486 services454 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.

205 services185 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.

110 services104 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.

109 services104 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.

96 services94 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.

76 services76 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.

62 services60 patients

Mri scan of lower spinal canal without contrast 72148

58 services58 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.

46 services44 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.

37 services37 patients

Mri scan of upper spinal canal without contrast 72141

23 services23 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.

19 services19 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.

19 services19 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.

19 services18 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.

13 services13 patients

Ct scan of lower spine without contrast 72131

11 services11 patients

Hospital Affiliations CMS Care Compare

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

Maui Memorial Medical Center

Acute Care Hospitals · Wailuku, HI

3/5 CMS rating

OwnershipGovernment - State

CMS Certification Number120002

Location221 Mahalani StreetWailuku, HI 96793 · Maui County

Birthing friendly

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. DAVID C KIM M.D.

Pediatrics (Neonatal-Perinatal Medicine)

2801 ATLANTIC AVE
LONG BEACH, CA 90806

Los Angeles County (562) 933-8100

MRS. ELISHA MARIE MARTIN MSN, NP

Nurse Practitioner (Acute Care)

2801 ATLANTIC AVE
LONG BEACH, CA 90806

Los Angeles County (310) 350-8902

MICHAEL A RAYA MD

Internal Medicine

2801 ATLANTIC AVE
LONG BEACH, CA 90806

Los Angeles County (562) 426-3333

ELIZABETH MARY ZAAROUR

Physician Assistant

2801 ATLANTIC AVE
LONG BEACH, CA 90806

Los Angeles County (562) 249-4575

LONG BEACH MEMORIAL MEDICAL

Pharmacy (Community/Retail Pharmacy)

2801 ATLANTIC AVE
LONG BEACH, CA 90806

Los Angeles County (562) 933-0330

GLENN LEVINE M.D.

Pediatrics (Pediatric Critical Care Medicine)

2801 ATLANTIC AVE, 3RD FLOOR
LONG BEACH, CA 90806

Los Angeles County (562) 933-8743

DAVID KHOA CAO DO

Internal Medicine

2801 ATLANTIC AVE
LONG BEACH, CA 90806

Los Angeles County (562) 426-3333

RICHARD ERIC SWENSSON MD

Pediatrics (Pediatric Cardiology)

2801 ATLANTIC AVE
LONG BEACH, CA 90806

Los Angeles County (562) 933-3350

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 Dianna Chooljian's NPI number?

The NPI number for Dianna Chooljian is 1902888043. It was assigned to this individual provider in the NPPES registry on November 15, 2005.

Where is Dianna Chooljian located?

Dianna Chooljian practices at 2801 Atlantic Ave, Long Beach, CA 90806. The listed phone number is (562) 933-1550.

What is Dianna Chooljian's specialty?

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

Is Dianna Chooljian enrolled in Medicare?

Yes. Dianna Chooljian 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 Dianna Chooljian's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dianna Chooljian reassigns Medicare benefits to 7 organizations: Torrance Memorial Medical Center (Torrance, CA), Healthcare Partners Affiliates Medical Group (Los Angeles, CA), Renaissance Imaging Medical Associates, Inc. (Northridge, CA), Palms Imaging Medical Group (Oxnard, CA), Southern Inyo Healthcare District (Lone Pine, CA) and 2 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 Dianna Chooljian's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Dianna Chooljian affiliated with any hospitals?

According to CMS data, Dianna Chooljian is affiliated with Maui Memorial Medical Center.

When was this NPI record last updated?

The NPPES record for Dianna Chooljian was last updated on April 20, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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.