Dr. Clan Hyoku Hahn, MD
- Medicare services, 2024
- 2,769
- Medicare patients, 2024
- 261
- Part D claims, 2024
- 1,611
- Hospital affiliations
- 2
- Industry payments
- $22,327
- Practice address
- 520 S Virgil Ave Ste 306, Los Angeles, CA 90020-1441
- Practice phone
- Call (213) 277-1700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Clan Hahn MD Clinic A Medical Group
Physician office · Los Angeles, California
Find Dr. Hahn's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Clan Hyoku Hahn is a hematologist and oncologist in Los Angeles, California
Dr. Hahn practices at Clan Hahn MD Clinic A Medical Group in Los Angeles, California.
Dr. Hahn's NPI, 1023043189, was assigned on July 11, 2006. Dr. Hahn graduated from Loma Linda University School Of Medicine in 1992. Dr. Hahn's California license number on file is G78245.
- NPI
- 1023043189NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335282276
- NPI enumeration date
- July 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (213) 277-1700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Clan Hyoku Hahn practices at Clan Hahn MD Clinic A Medical Group in Los Angeles, California
Dr. Hahn's primary practice is Clan Hahn MD Clinic A Medical Group, at 520 S Virgil Ave Ste 306, Los Angeles, CA 90020-1441. The practice phone is (213) 277-1700.
- Clan Hahn MD Clinic A Medical Group520 S Virgil Ave Ste 306, Los Angeles, CA 90020-1441Phone(213) 277-1700
Source: Dmand AI Affiliation Data
Dr. Clan Hyoku Hahn is affiliated with 5 sites of care and 1 medical group
Dr. Hahn's primary practice is Clan Hahn MD Clinic A Medical Group in Los Angeles, California. Dr. Hahn is also affiliated with PIH Health Good Samaritan Hospital. The medical group on file is USC Care Medical Group. Dmand AI also links Dr. Hahn to 1 more hospital, 1 physician office and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Clan Hyoku Hahn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hahn practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Clan Hahn MD Clinic A Medical Group | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Clan Hyoku Hahn is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Hahn's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Hahn is board certified in internal medicine by the American Board of Internal Medicine. Dr. Hahn has a license on file in California.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
Clinical focus
Dmand AI lists breast cancer, chronic anemia, chronic leukemia, colorectal cancer, deep vein thrombosis (DVT), lung cancer, lymphoma and multiple myeloma among the conditions Dr. Hahn treats.
Hematologists and oncologists near Dr. Hahn
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Clan Hyoku Hahn billed Medicare for 2,769 services in 2024
CMS data shows 2,769 Medicare services from Dr. Hahn across 10 procedure codes in 2024, for 261 Medicare patients. Medicare paid $195,901 for them.
Dr. Hahn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2,1272024: 1,68421%
- Tests and treatments
- 2023: 1,2982024: 50561%
- Surgery
- 2023: 6772024: 49627%
- Drugs given in the office
- 2023: 1,9912024: 8496%
Where Dr. Hahn's Medicare services took place, 2024
- In an office1,90069%
- In a facility86931%
Dr. Hahn compared with the California median for hematologists and oncologists, 2024
- Dr. Hahn
- California median
- Medicare services
- 2,769vs 9323.0 times
- Medicare patients
- 261vs 22516% above
- Part D claims
- 1,292vs 3943.3 times
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. Hahn's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Hahn?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hahn and other hematologists and oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Clan Hyoku Hahn treated 261 Medicare patients in 2024, average age 80
CMS counts 261 Medicare patients who saw Dr. Hahn in 2024. The largest group is 75 to 84, with 114 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 88% are also on Medicaid. Their average risk score is 2.79, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Hahn's median patient age at 73, with 56% women.
Dr. Hahn's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hahn's Medicare patients by sex, 2024
- Women14756%
- Men11444%
Chronic conditions among Dr. Hahn's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes69%
- Arthritis66%
- Chronic kidney disease46%
- Cancer42%
- Ischemic heart disease42%
- Osteoporosis34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hahn's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Clan Hyoku Hahn wrote 1,611 Medicare Part D claims in 2024
In 2024, Dr. Hahn wrote 1,611 Medicare Part D claims for 210 patients. 69% of them were for generic drugs. CMS names the drug for 1,292 of them, across 50 drugs with 11 or more claims each, at $2,913,162 in total drug cost. In 2023, CMS named 915 claims across 38 drugs.
Dr. Hahn's Part D claims by kind of drug, 2024
- Generic1,119 claims69%
- Brand-name492 claims31%
Dr. Hahn's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hahn's Part D claims, 2024
- Opioids4%72 of 1,611 claims
- Antibiotics4%59 of 1,611 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9152024: 1,29241%
Drugs named by CMS: 50 in 2024, 38 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Clan Hyoku Hahn takes part in Medicare
Dr. Hahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Clan Hyoku Hahn received $22,327 in industry payments from 2016 to 2025
CMS Open Payments shows 1,001 general payments to Dr. Hahn from 61 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Bristol-Myers Squibb Company paid the most, $2,489.
General payments to Dr. Hahn by program year, 2016 to 2025
General payments to Dr. Hahn by kind, 2016 to 2025
- Food and beverage$21,51296%
- Device or supply loans$4992%
- Education$3031%
- Entertainment$140%
Companies that paid Dr. Hahn the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Clan Hyoku Hahn graduated from Loma Linda University School Of Medicine
Dr. Hahn graduated from Loma Linda University School Of Medicine in 1992.
- Medical school
- Board certified in internal medicine
- Board certified in medical oncology
Source: Dmand AI Professional Profile Data
Dr. Clan Hyoku Hahn accepts plans from 16 insurance carriers
Dr. Hahn is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Humana
- Blue Cross Blue Shield of Massachusetts
- Molina
- +8 more carriersWith a free account
Plan types Dr. Hahn accepts, by number of carriers
- Medicare10
- PPO10
- HMO8
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Clan Hyoku Hahn's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Clan Hyoku Hahn
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Clan Hyoku Hahn's NPI number?
Dr. Clan Hyoku Hahn's NPI number is 1023043189. It was assigned on July 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Clan Hyoku Hahn?
Dr. Clan Hyoku Hahn is a hematologist and oncologist in Los Angeles, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Clan Hyoku Hahn practice?
Dr. Hahn practices at 520 S Virgil Ave Ste 306, Los Angeles, CA 90020-1441. Dr. Hahn's primary practice is Clan Hahn MD Clinic A Medical Group in Los Angeles, California. Dmand AI also links Dr. Hahn to 1 hospital, 1 physician office and 1 group practice or clinic.
What is Dr. Clan Hyoku Hahn's office phone number?
The practice phone on file for Dr. Hahn is (213) 277-1700.
What is Dr. Clan Hyoku Hahn's medical license number?
Dr. Hahn's California license number on file is G78245.
Which hospitals is Dr. Clan Hyoku Hahn affiliated with?
Dr. Hahn is affiliated with PIH Health Good Samaritan Hospital. Dmand AI links Dr. Hahn to 1 more hospital.
What medical group is Dr. Clan Hyoku Hahn part of?
Dr. Hahn is linked to USC Care Medical Group.
Does Dr. Clan Hyoku Hahn accept Medicare?
Yes. CMS data shows Dr. Hahn billed Medicare for 2,769 services in 2024, and Dr. Hahn accepts Medicare assignment.
How many Medicare patients does Dr. Clan Hyoku Hahn see?
CMS counts 261 Medicare patients who saw Dr. Hahn in 2024, with an average age of 80.
Is Dr. Clan Hyoku Hahn board certified?
Yes. Dr. Hahn is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Clan Hyoku Hahn bill to Medicare?
In 2024, Dr. Hahn's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99233) and surgery: heart and blood vessels (36415).
Where did Dr. Clan Hyoku Hahn go to medical school?
Dr. Hahn graduated from Loma Linda University School Of Medicine in 1992.
What drugs does Dr. Clan Hyoku Hahn prescribe most?
In 2024 Medicare Part D data, Dr. Hahn's most prescribed drugs by claims were Anastrozole, Ondansetron ODT and Hydrocodone-Acetaminophen.
Has Dr. Clan Hyoku Hahn received payments from drug or device companies?
CMS Open Payments shows $22,327 in general payments to Dr. Hahn from 61 companies from 2016 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Clan Hyoku Hahn been practicing?
Dr. Hahn graduated from medical school in 1992, 34 years ago.
What insurance does Dr. Clan Hyoku Hahn accept?
Dr. Hahn is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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