DR. WILLIAM N. PAIK M.D.
NPI 1265584825
Radiology - Diagnostic Radiology in Honolulu, HI

Q: What is William Paik's NPI number?

The NPI number for William Paik is 1265584825. It was assigned to this individual provider in the NPPES registry on January 16, 2007.

Q: What is William Paik'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 William Paik was last updated on April 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 January 16, 2007PECOS EnrolledAccepts Medicare Assignment

1388 ALA MOANA BLVD APT 3702, HONOLULU, HI 96814(949) 230-8886 Get Directions Write a Review

NPPES record last updated: April 23, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 23, 2021, Dec 2, 2015 (2 updates tracked since 2015).

On this page

About Dr. William N. Paik M.d. NPPES

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

DR. WILLIAM N. PAIK M.D. (NPI 1265584825) is an individual diagnostic radiology provider in Honolulu, Hawaii, licensed in California (A74379) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with Penn State Health Holy Spirit Medical Center, and is a graduate of Columbia University College Of Physicians And Surgeons (1994).

NPPES Registry Identity

NPI1265584825

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameDR. WILLIAM N. PAIKCredential: M.D.

Location Address1388 ALA MOANA BLVD APT 3702Honolulu, HI 96814-4654

Mailing Address1388 Ala Moana Blvd Apt 3702Honolulu, HI 96814-4654 · (949) 230-8886

Phone(949) 230-8886

Sole ProprietorYes

Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 1994

Enumeration DateJanuary 16, 2007

Last NPPES UpdateApril 23, 20212 updates tracked since enumeration

NPPES CertifiedApril 23, 2021

✔ NPI 1265584825 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 · A74379

Definition

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

1388 ALA MOANA BLVD APT 3702, Honolulu, HI 96814

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Other Identifiers 2

Medicaid1265584825CA

OtherP01440178CA · Railroad Medicare

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. William N. Paik 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 ID6709109978

PECOS Enrollment IDI20231110000869

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 William Paik reassigns Medicare billing to 16 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ukiah Adventist Hospital

2,388 mi

General Acute Care Hospital

275 HOSPITAL DR
Ukiah, CA 95482

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

NPI 1235120676 (707) 463-7360

Willits Hospital Inc.

2,389 mi

Critical Access

1 MARCELA DRIVE
Willits, CA 95490

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

NPI 1356339543 (707) 459-6801

Adventist Health Delano

2,530 mi

General Acute Care Hospital

1401 GARCES HWY
Delano, CA 93215

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

NPI 1073645388 (661) 725-4800

West Valley Radiology Medical Group, Inc.

2,543 mi

Diagnostic Radiology

7300 MEDICAL CENTER DR
West Hills, CA 91307

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

NPI 1265486427 (888) 407-3975

Torrance Memorial Medical Center

2,555 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

Radiology Medical Group Of Wmmc

2,564 mi

Diagnostic Radiology

1720 E CESAR E CHAVEZ AVE
Los Angeles, CA 90033

Reassigned Medicare billing, Hawaii enrollment
2 clinicians in this Medicare group

NPI 1831123868 (626) 795-1610

Los Angeles Radiology Medical Associates, Inc.

2,565 mi

Diagnostic Radiology

1509 WILSON TERRACE
Glendale, CA 91206

Reassigned Medicare billing, California and Hawaii enrollments
53 clinicians in this Medicare group

NPI 1366525487 (818) 409-8000

Usc Care Medical Group, Inc

2,565 mi

General Practice

1520 SAN PABLO ST
Los Angeles, CA 90033

Reassigned Medicare billing, California enrollment
2,445 clinicians in this Medicare group

NPI 1902846306 (323) 442-5955

Kc Tan, M.D. Medical Corporation

2,570 mi

Neuroradiology

525 N GARFIELD AVE
Monterey Park, CA 91754

Reassigned Medicare billing, California enrollment
Medicare enrollment name: Kc Tan MD Medical Corporation
74 clinicians in this Medicare group

NPI 1215394036 (626) 522-6030

Los Alamitos Radiology Group Inc

2,570 mi

Diagnostic Radiology

3751 KATELLA AVE
Los Alamitos, CA 90720

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

NPI 1427005024 (562) 799-3294

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 44

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.

459 services443 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.

330 services328 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.

229 services226 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.

186 services186 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.

181 services181 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.

131 services128 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.

123 services123 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.

83 services83 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.

82 services82 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.

64 services64 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.

52 services52 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.

50 services47 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.

46 services46 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.

43 services43 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 services37 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.

39 services38 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.

36 services36 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.

32 services32 patients

X-ray of chest, 2 views 71046

30 services30 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

27 services27 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.

24 services24 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

24 services24 patients

X-ray of thigh bone, minimum 2 views 73552

An X-ray of the thigh bone is a non-invasive imaging test. It involves passing a small amount of radiation through the thigh to produce images of the bone structure. At least two different angles are captured for a comprehensive view. This helps detect fractures, infections, or other abnormalities.

24 services21 patients

Ct scan of abdomen and pelvis before and after contrast 74178

A CT scan of your abdomen and pelvis with and without contrast helps visualize your internal organs better. Contrast is a special dye that improves the clarity of the images. It's taken orally or injected into your veins before the scan. The process is painless and quick.

24 services24 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.

23 services21 patients

X-ray of lower leg, 2 views 73590

An X-ray of the lower leg, 2 views, is a quick, painless test that produces images of the bones in your lower leg. It helps to identify fractures, infections, or diseases. Two different angles are used to provide a comprehensive view of the leg's structure.

23 services21 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

22 services20 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.

21 services20 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

19 services19 patients

Ct scan of abdomen and pelvis without contrast 74176

19 services19 patients

Complete ultrasound scan behind abdominal cavity 76770

19 services19 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.

17 services17 patients

Ct scan of abdomen and pelvis with contrast 74177

17 services17 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.

16 services16 patients

Ct scan of abdomen and pelvis before and after contrast 74178

16 services16 patients

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

16 services16 patients

Ct scan of soft tissue of neck with contrast 70491

A CT scan of the neck with contrast is a non-invasive imaging procedure. A special dye is administered to highlight the soft tissues in your neck, making them easier to see. This helps detect issues like infections, tumors, or other abnormalities.

15 services15 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

14 services14 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.

14 services14 patients

Ct scan head or brain without contrast 70450

11 services11 patients

Ct scan of chest with contrast 71260

11 services11 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.

11 services11 patients

X-ray of upper arm, minimum of 2 views 73060

An X-ray of the upper arm with a minimum of 2 views involves capturing images of your arm from different angles. This helps in assessing the bones and surrounding tissues for any abnormalities or injuries. It's a quick, painless procedure.

11 services11 patients

Limited ultrasound scan of abdomen 76705

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.

Penn State Health Holy Spirit Medical Center

Acute Care Hospitals · Camp Hill, PA

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390004

Location503 North 21st StreetCamp Hill, PA 17011 · Cumberland County

Emergency services

Upmc Carlisle

Acute Care Hospitals · Carlisle, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390058

Location361 Alexander Spring RoadCarlisle, PA 17015 · Cumberland County

Emergency services Birthing friendly

Upmc Pinnacle Hospitals

Acute Care Hospitals · Harrisburg, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390067

Location409 South Second StreetHarrisburg, PA 17104 · Dauphin County

Emergency services Birthing friendly

Upmc Memorial

Acute Care Hospitals · York, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390101

Location1701 Innovation DriveYork, PA 17408 · York County

Emergency services Birthing friendly

Upmc Hanover

Acute Care Hospitals · Hanover, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390233

Location300 Highland AveHanover, PA 17331 · York County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 96814 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

$92.50 typical visit price

range $60.53 – $180.05

Typical copayment $23.12 (range $15.13 – $45.01)

Most-billed visit code 99203

Established Patient

$74.92 typical visit price

range $20.09 – $147.56

Typical copayment $18.73 (range $5.02 – $36.89)

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.

Reported Quality Measures

Radiation Consideration for Adult CT: Utilization of Dose Lowering Techniques

Percentage of final reports for patients aged 18 years and older undergoing CT with documentation that one or more of the following dose reduction techniques were used: - Automated exposure control - Adjustment of the mA and/or kV according to patient size -…

100%305 patients

Radiology: Stenosis Measurement in Carotid Imaging Reports

Percentage of final reports for carotid imaging studies (neck magnetic resonance angiography [MRA], neck computed tomography angiography [CTA], neck duplex ultrasound, carotid angiogram) performed that include direct or indirect reference to measurements of…

96%25 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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 William Paik's NPI number?

The NPI number for William Paik is 1265584825. It was assigned to this individual provider in the NPPES registry on January 16, 2007.

Where is William Paik located?

William Paik practices at 1388 Ala Moana Blvd Apt 3702, Honolulu, HI 96814. The listed phone number is (949) 230-8886.

What is William Paik's specialty?

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

Is William Paik enrolled in Medicare?

Yes. William Paik 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 William Paik's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Paik reassigns Medicare benefits to 16 organizations: Ukiah Adventist Hospital (Ukiah, CA), Willits Hospital Inc. (Willits, CA), Adventist Health Delano (Delano, CA), West Valley Radiology Medical Group, Inc. (West Hills, CA), Torrance Memorial Medical Center (Torrance, CA) and 11 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 William Paik's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William Paik affiliated with any hospitals?

According to CMS data, William Paik is affiliated with Penn State Health Holy Spirit Medical Center, Upmc Carlisle, Upmc Pinnacle Hospitals, Upmc Memorial and Upmc Hanover.

When was this NPI record last updated?

The NPPES record for William Paik was last updated on April 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.