Dr. Hyung W. An, MD
- Medicare services, 2024
- 31
- Medicare patients, 2024
- 22
- Part D claims, 2024
- 259
- MIPS score, 2024
- 81
- Hospital affiliations
- 1
- Practice address
- 1531 Esplanade, Chico, CA 95926
- Practice phone
- Call (530) 332-7300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. An'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. Hyung W. An is an internist in Chico, California
Dr. An practices at Enloe Health in Chico, California, part of Enloe Health.
Dr. An's NPI, 1336108851, was assigned on March 22, 2006. Dr. An graduated from Loma Linda University School Of Medicine in 1996. Dr. An holds California license A64726.
- NPI
- 1336108851NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204740020
- NPI enumeration date
- March 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (530) 332-7300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hyung W. An practices at Enloe Health in Chico, California
Dr. An's primary practice is Enloe Health, at 1531 Esplanade, Chico, CA 95926 in Butte County. The practice phone is (530) 332-7300.
- Enloe Health1531 Esplanade, Chico, CA 95926 · Butte CountyPhone(530) 332-7300
Source: Dmand AI Affiliation Data
Dr. Hyung W. An is affiliated with 3 sites of care and 1 medical group
Dr. An's primary practice is Enloe Health in Chico, California, part of Enloe Health. The medical group on file is Chico Hospitalist Group. Dmand AI also links Dr. An to 1 more physician office and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Hyung W. An's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. An practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Enloe Health | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Enloe Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Hyung W. An is one of 16,751 internists in California
Internal medicine is Dr. An's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. An is board certified in internal medicine by the American Board of Internal Medicine. Dr. An is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists fibromyalgia and chronic pain, insomnia and lower back pain among the conditions Dr. An treats.
Internists near Dr. An
Counts of internists 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. Hyung W. An billed Medicare for 31 services in 2024
CMS data shows 31 Medicare services from Dr. An across 1 procedure code in 2024, for 22 Medicare patients. Medicare paid $3,285 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. An's Medicare services by type, 2021 to 2024
- 2021
- 2024
- Tests and treatments
- 2021: 02024: 31
- Office and hospital visits
- 2021: 632024: 0100%
Dr. An compared with the California median for internists, 2024
- Dr. An
- California median
- Medicare services
- 31vs 36191% below
- Medicare patients
- 22vs 15185% below
- Part D claims
- 111vs 42174% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. An'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. An?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. An and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Hyung W. An treated 22 Medicare patients in 2024, average age 71
CMS counts 22 Medicare patients who saw Dr. An in 2024. 75% of them have high blood pressure, and 73% have mood disorders. Their average risk score is 2.15, 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. An's median patient age at 79, with 60% women.
Chronic conditions among Dr. An's Medicare patients, 2024
- High blood pressure75%
- Mood disorders73%
- Cancer59%
- Depression59%
- High cholesterol59%
- Anxiety55%
Share of Medicare patients with each condition. A patient can have several.
Dr. An's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Hyung W. An wrote 259 Medicare Part D claims in 2024
In 2024, Dr. An wrote 259 Medicare Part D claims for 44 patients. 92% of them were for generic drugs. CMS names the drug for 111 of them, across 8 drugs with 11 or more claims each, at $1,551 in total drug cost. In 2023, CMS named 100 claims across 5 drugs.
Dr. An's Part D claims by kind of drug, 2024
- Generic237 claims92%
- Brand-name and other22 claims8%
Dr. An'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. An's Part D claims, 2024
- Opioids13%34 of 259 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: 1002024: 11111%
Drugs named by CMS: 8 in 2024, 5 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
Dr. Hyung W. An scored 81 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Dr. An for performance year 2024, reported as part of a group. Dr. An accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. An as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. An's MIPS scores, performance year 2024
- 81of 100Final score
- 60.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 69of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Hyung W. An graduated from Loma Linda University School Of Medicine
Dr. An graduated from Loma Linda University School Of Medicine in 1996.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Hyung W. An accepts plans from 3 insurance carriers
Dr. An is in network with 3 carriers, including Aetna, Blue Cross Blue Shield of Michigan and CMS Medicare. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- CMS Medicare
Plan types Dr. An accepts, by number of carriers
- HMO2
- Medicare2
- POS2
- PPO2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Hyung W. An'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 DataDmand AI Org Hierarchy 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)Clinician Public Reporting: Overall MIPS Performance (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. Hyung W. An
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. Hyung W. An's NPI number?
Dr. Hyung W. An's NPI number is 1336108851. It was assigned on March 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Hyung W. An?
Dr. Hyung W. An is an internist in Chico, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Hyung W. An practice?
Dr. An practices at 1531 Esplanade, Chico, CA 95926. Dr. An's primary practice is Enloe Health in Chico, California, part of Enloe Health. Dmand AI also links Dr. An to 1 physician office and 1 hospice.
What is Dr. Hyung W. An's office phone number?
The practice phone on file for Dr. An is (530) 332-7300.
What is Dr. Hyung W. An's medical license number?
Dr. An holds California license A64726.
Which hospitals is Dr. Hyung W. An affiliated with?
Dr. An practices at Enloe Health in Chico, California.
What medical group is Dr. Hyung W. An part of?
Dr. An is linked to Chico Hospitalist Group.
Does Dr. Hyung W. An accept Medicare?
Yes. CMS data shows Dr. An billed Medicare for 31 services in 2024, and Dr. An accepts Medicare assignment.
Does Dr. Hyung W. An offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. An as offering telehealth services.
What is Dr. Hyung W. An's MIPS score?
Dr. An's MIPS final score for performance year 2024 is 81 out of 100, reported as part of a group.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Hyung W. An see?
CMS counts 22 Medicare patients who saw Dr. An in 2024, with an average age of 71.
Is Dr. Hyung W. An board certified?
Yes. Dr. An is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Hyung W. An bill to Medicare?
In 2024, Dr. An's most billed Medicare services were psychiatric service (90837).
Where did Dr. Hyung W. An go to medical school?
Dr. An graduated from Loma Linda University School Of Medicine in 1996.
What drugs does Dr. Hyung W. An prescribe most?
In 2024 Medicare Part D data, Dr. An's most prescribed drugs by claims were Lisinopril, Fluoxetine HCl and Hydromorphone HCl.
How long has Dr. Hyung W. An been practicing?
Dr. An graduated from medical school in 1996, 30 years ago.
What insurance does Dr. Hyung W. An accept?
Dr. An is in network with 3 carriers, including Aetna, Blue Cross Blue Shield of Michigan and CMS Medicare. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
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