Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHAN K. AHN MD
NPI 1972546240
Radiology - Diagnostic Radiology in Tacoma, WA

Q: What is Johan Ahn's NPI number?

The NPI number for Johan Ahn is 1972546240. It was assigned to this individual provider in the NPPES registry on June 14, 2006.

Q: What is Johan Ahn'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 Johan Ahn was last updated on October 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 days 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 June 14, 2006PECOS EnrolledAccepts Medicare Assignment

1304 FAWCETT AVE STE 100, TACOMA, WA 98402(253) 761-4200(253) 761-4201 Get Directions Write a Review

NPPES record last updated: October 7, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 7, 2026, Dec 30, 2024, Aug 15, 2023 and 3 more (6 updates tracked since 2020).

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About Dr. Johan K. Ahn Md NPPES

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

DR. JOHAN K. AHN MD (NPI 1972546240) is an individual diagnostic radiology provider in Tacoma, Washington, licensed in California (A84698) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with The Queens Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1972546240

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameDR. JOHAN K. AHNCredential: MD

Location Address1304 FAWCETT AVE STE 100Tacoma, WA 98402-1900

Mailing AddressPo Box 1535Tacoma, WA 98401-1535 · (253) 761-4200 · Fax (253) 383-3553

Phone(253) 761-4200

Fax(253) 761-4201

Sole ProprietorNo

Medical School CMSNew York Medical CollegeGraduated 1995

Enumeration DateJune 14, 2006

Last NPPES UpdateOctober 7, 20266 updates tracked since enumeration

NPPES CertifiedOctober 7, 2026

✔ NPI 1972546240 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 CA · A84698✔ Licensed in HI · MD-9933✔ Licensed in IL · 036180646✔ Licensed in WA · MD00042505✔ Licensed in OR · MD151077

Definition

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

1304 FAWCETT AVE STE 100, Tacoma, WA 98402

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Secondary Practice Locations 2

Location 11301 Punchbowl StHonolulu, HI 96813-2499 · Phone (808) 691-1000

Location 24500 Memorial DrBelleville, IL 62226-5360 · Phone (314) 362-7200

Other Identifiers 3

Medicaid1060681OR

Medicaid1060681WA

Medicaid8399263WA

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. Johan K. Ahn 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 ID4183695547

PECOS Enrollment IDI20050421001196, I20220822000739

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 Johan Ahn reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tra-Minw P S

2.1 mi

Radiology

2502 S UNION AVE
Tacoma, WA 98405

Reassigned Medicare billing, Oregon enrollment
28 clinicians in this Medicare group

NPI 1396814166 (253) 761-4200

Diagnostic Radiological Imaging

601 mi

Diagnostic Radiology

79 SCRIPPS DR
Sacramento, CA 95825

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

NPI 1710931910 (916) 921-1300

Norcal Imaging

645 mi

Diagnostic Radiology

114 LA CASA VIA, SUITES # 100 & 200
Walnut Creek, CA 94598

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

NPI 1376667022 (925) 937-6100

Beverly Radiology Medical Group III

898 mi

Radiology

222 E MAIN ST, SUITES 213 & 214
Barstow, CA 92311

Reassigned Medicare billing, California enrollment
Also billed through NPI 1467647636 (California), NPI 1114112372 (California)
335 clinicians in this Medicare group

NPI 1285867887 (760) 242-4444

Cedars-Sinai Medical Care Foundation

933 mi

Anesthesiology

8700 BEVERLY BLVD STE SB-290
Los Angeles, CA 90048

Reassigned Medicare billing, California enrollment
2,118 clinicians in this Medicare group

NPI 1043826720 (310) 423-1447

Desert Advanced Imaging Medical Center

985 mi

Diagnostic Radiology

72855 FRED WARING DR
Palm Desert, CA 92260

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

NPI 1568416147 (760) 346-1130

Queens North Hawaii Community Hospital

2,645 mi

Home Health

67-1125 MAMALAHOA HWY
Kamuela, HI 96743

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

NPI 1124009584 (808) 881-4400

Queens University Medical Group

2,663 mi

Multi-Specialty

1301 PUNCHBOWL ST
Honolulu, HI 96813

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

NPI 1891441382 (808) 691-1000

Kauai Medical Clinic

2,689 mi

Multi-Specialty

3-3420 KUHIO HWY, SUITE B
Lihue, HI 96766

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

NPI 1376596643 (808) 245-1500

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 35

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.

1,250 services993 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.

244 services238 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.

132 services114 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.

86 services82 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.

61 services61 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.

58 services54 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.

53 services43 patients

Screening mammography 77067

Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.

53 services53 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.

51 services43 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.

45 services45 patients

Screening 3d breast mammography 77063

Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.

36 services36 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.

35 services35 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.

35 services33 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.

34 services24 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.

33 services23 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

32 services32 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

24 services23 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.

23 services23 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.

22 services22 patients

X-ray of elbow, minimum of 3 views 73080

An elbow X-ray with a minimum of 3 views is a non-invasive imaging test. It helps visualize the bones of the elbow from different angles. This aids in diagnosing conditions like fractures or arthritis. The procedure is quick, painless, and usually takes around 15 minutes.

22 services22 patients

X-ray of upper spine, 4-5 views 72050

An X-ray of the upper spine with 4-5 views is a non-invasive imaging test. It uses radiation to capture detailed images of the bones and structures in your neck and upper back. This procedure helps identify issues like fractures, infections, or deformities.

21 services20 patients

X-ray of wrist, minimum of 3 views 73110

An X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.

21 services18 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.

21 services19 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.

21 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.

20 services19 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.

17 services14 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.

17 services17 patients

X-ray of finger, minimum of 2 views 73140

An X-ray of the finger involves capturing images of your finger from at least two different angles. This non-invasive procedure helps in visualizing the bones and joints, aiding in the diagnosis of fractures, infections, or other abnormalities. Minimal discomfort may be experienced.

14 services13 patients

X-ray of hip, 2-3 views 73502

13 services13 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.

12 services11 patients

Diagnostic mammography of both breasts 77066

Diagnostic mammography involves using special imaging technology to capture detailed images of both breasts. This procedure helps in identifying any unusual changes or abnormalities. It's a crucial step in ensuring breast health and early detection of potential issues.

12 services12 patients

X-ray of both hips, 3-4 views 73522

An X-ray of both hips with 3-4 views is a safe imaging procedure. It involves capturing multiple pictures of your hip joints from different angles. This helps in diagnosing conditions like arthritis or fractures. You'll need to stay still during the process for clear images.

11 services11 patients

X-ray of knee, 4 or more views 73564

11 services11 patients

Screening 3d breast mammography 77063

11 services11 patients

Screening mammography 77067

11 services11 patients

Hospital Affiliations CMS Care Compare

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

The Queens Medical Center

Acute Care Hospitals · Honolulu, HI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number120001

Location1301 Punchbowl StHonolulu, HI 96813 · Honolulu County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98402 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

$88.29 typical visit price

range $57.27 – $172.80

Typical copayment $22.07 (range $14.31 – $43.20)

Most-billed visit code 99203

Established Patient

$71.29 typical visit price

range $18.56 – $141.11

Typical copayment $17.82 (range $4.64 – $35.27)

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.

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. YUYAO ZHANG MD

Radiology (Diagnostic Radiology)