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MR. CLAN HYOKU HAHN M.D.
NPI 1023043189
Internal Medicine - Hematology & Oncology in Los Angeles, CA

Active since July 11, 2006PECOS EnrolledAccepts Medicare Assignment
520 S VIRGIL AVE STE 306, LOS ANGELES, CA 90020(213) 277-1700(213) 277-1817 Get Directions Write a Review

NPPES record last updated: July 12, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 12, 2022, Nov 11, 2020 (2 updates tracked since 2020).

About Mr. Clan Hyoku Hahn M.d. NPPES

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

MR. CLAN HYOKU HAHN M.D. (NPI 1023043189) is an individual hematology & oncology provider in Los Angeles, California, licensed in California (G78245) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (1992).

NPPES Registry Identity

NPI1023043189
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameMR. CLAN HYOKU HAHNCredential: M.D.
Location Address520 S VIRGIL AVE STE 306Los Angeles, CA 90020-1441
Mailing Address520 S Virgil Ave Ste 306Los Angeles, CA 90020-1441 · (213) 277-1700 · Fax (213) 277-1817
Phone(213) 277-1700
Fax(213) 277-1817
Sole ProprietorNo
Medical School CMSLoma Linda University School Of MedicineGraduated 1992
Enumeration DateJuly 11, 2006
Last NPPES UpdateJuly 12, 20222 updates tracked since enumeration
NPPES CertifiedJuly 12, 2022
✔ NPI 1023043189 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · G78245
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
520 S VIRGIL AVE STE 306, Los Angeles, CA 90020
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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

Mr. Clan Hyoku Hahn 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 ID9335282276
PECOS Enrollment IDI20100201000648
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

2

Medicare enrollment records show Clan Hahn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Clan Hahn MD Clinic, A Medical Corp
Same address
Hematology & Oncology
520 S VIRGIL AVE STE 306
Los Angeles, CA 90020
  • Reassigned Medicare billing, California enrollment
NPI 1669127213 (213) 277-1700
Usc Care Medical Group, Inc
4.8 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

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 10

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
745 services161 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
737 services97 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
496 services141 patients
Injection of additional new drug or substance into vein 96375
This procedure involves introducing a new medication or substance into your bloodstream via a vein. It's typically done using a small needle. The substance can help treat various conditions or assist in diagnostic procedures. It's generally safe and monitored by professionals.
179 services13 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
132 services100 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
126 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90020 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
$187.60 typical visit price
range $62.96 – $187.60
Typical copayment $46.90 (range $15.74 – $46.90)
Most-billed visit code 99205
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
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

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

CLAN HAHN MD CLINIC, A MEDICAL CORP
Internal Medicine (Hematology & Oncology)
520 S VIRGIL AVE STE 306
LOS ANGELES, CA 90020
Los Angeles County (213) 277-1700

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 Clan Hahn's NPI number?

The NPI number for Clan Hahn is 1023043189. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Where is Clan Hahn located?

Clan Hahn practices at 520 S Virgil Ave Ste 306, Los Angeles, CA 90020. The listed phone number is (213) 277-1700.

What is Clan Hahn's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Clan Hahn enrolled in Medicare?

Yes. Clan Hahn 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 Clan Hahn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Clan Hahn reassigns Medicare benefits to 2 organizations: Clan Hahn MD Clinic, A Medical Corp (Los Angeles, CA) and Usc Care Medical Group, Inc (Los Angeles, CA). 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 Clan Hahn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Clan Hahn was last updated on July 12, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.