Leana Chien, CNS-BC, NP-BC
- Medicare services, 2024
- 76
- Medicare patients, 2024
- 35
- MIPS score, 2024
- 93
- Industry payments
- $1,580
- Affiliated sites
- 3
- Practice address
- 1500 Duarte Rd, Duarte, CA 91010
- Practice phone
- Call (800) 826-4673
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
City of Hope Comprehensive Cancer Center - Duarte
Duarte, California
Find Leana Chien'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.
Leana Chien is a gerontology nurse practitioner in Duarte, California
Leana Chien practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California.
Leana Chien's NPI, 1215252010, was assigned on April 5, 2010. Leana Chien holds California license 18898.
- NPI
- 1215252010NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860773348
- NPI enumeration date
- April 5, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (800) 826-4673
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Leana Chien practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California
Leana Chien's primary practice is City of Hope Comprehensive Cancer Center - Duarte, at 1500 Duarte Rd, Duarte, CA 91010 in Los Angeles County. The practice phone is (800) 826-4673.
- City of Hope Comprehensive Cancer Center - Duarte1500 Duarte Rd, Duarte, CA 91010 · Los Angeles CountyPhone(800) 826-4673
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Leana Chien is affiliated with 4 sites of care and 2 medical groups
Leana Chien's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. The medical group on file is City of Hope. Dmand AI also links Leana Chien to 1 more home health agency, 1 other site, 1 therapy and rehab clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Leana Chien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Leana Chien practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| City of Hope Comprehensive Cancer Center - Duarte | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Leana Chien is one of 477 gerontology nurse practitioners in California
Gerontology is Leana Chien's primary specialty in the NPI Registry, under taxonomy code 363LG0600X. Leana Chien is licensed in California.
Specialties and state licenses
- Gerontology nurse practitioner, CaliforniaPrimary
Gerontology nurse practitioners near Leana Chien
Counts of gerontology nurse practitioners 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
Leana Chien billed Medicare for 76 services in 2024
CMS data shows 76 Medicare services from Leana Chien across 3 procedure codes in 2024, for 35 Medicare patients. Medicare paid $5,775 for them.
Leana Chien's Medicare services by type, 2024
- Office and hospital visits58
- Other services18
Where Leana Chien's Medicare services took place, 2024
- In an office2026%
- In a facility5674%
Leana Chien compared with the California median for gerontology nurse practitioners, 2024
- Leana Chien
- California median
- Medicare services
- 76vs 31876% below
- Medicare patients
- 35vs 10065% below
Medians across 270 gerontology nurse practitioners in California with Dmand AI profiles that report each measure.
Leana Chien'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Leana Chien and other gerontology nurse practitioners in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Leana Chien treated 35 Medicare patients in 2024, average age 76
CMS counts 35 Medicare patients who saw Leana Chien in 2024. The largest group is 75 to 84, with 17 patients. 75% of them have cancer, and 75% have high blood pressure. Their average risk score is 2.14, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Leana Chien's median patient age at 76, with 82% women.
Leana Chien's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Leana Chien's Medicare patients, 2024
- Cancer75%
- High blood pressure75%
- High cholesterol74%
- Arthritis49%
- Diabetes40%
- Ischemic heart disease37%
Share of Medicare patients with each condition. A patient can have several.
Leana Chien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women82%
- Men18%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Leana Chien scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Leana Chien for performance year 2024, reported as part of a group. Leana Chien accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Leana Chien as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Leana Chien's MIPS scores, performance year 2024
- 93of 100Final score
- 78.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 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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Leana Chien received $1,580 in industry payments from 2024 to 2025
CMS Open Payments shows 18 general payments to Leana Chien from 14 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 94% of the total. AstraZeneca Pharmaceuticals LP paid the most, $342.
General payments to Leana Chien by program year, 2024 to 2025
General payments to Leana Chien by kind, 2024 to 2025
- Food and beverage$1,48194%
- Education$996%
Companies that paid Leana Chien the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Leana Chien'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Leana Chien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Leana Chien's NPI number?
Leana Chien's NPI number is 1215252010. It was assigned on April 5, 2010, and it is active in the NPI Registry.
What does Leana Chien specialize in?
Leana Chien is a gerontology nurse practitioner in Duarte, California. The primary specialty in the NPI Registry is Gerontology Nurse Practitioner (taxonomy code 363LG0600X).
Where does Leana Chien practice?
Leana Chien practices at 1500 Duarte Rd, Duarte, CA 91010. Leana Chien's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. Dmand AI also links Leana Chien to 1 home health agency, 1 other site, 1 therapy and rehab clinic and 1 medical group.
What is Leana Chien's office phone number?
The practice phone on file for Leana Chien is (800) 826-4673.
What is Leana Chien's medical license number?
Leana Chien holds California license 18898.
What medical group is Leana Chien part of?
Leana Chien is linked to City of Hope. Dmand AI links Leana Chien to 1 more medical group.
Does Leana Chien accept Medicare?
Yes. CMS data shows Leana Chien billed Medicare for 76 services in 2024, and Leana Chien accepts Medicare assignment.
Does Leana Chien offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Leana Chien as offering telehealth services.
What is Leana Chien's MIPS score?
Leana Chien's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.
How many Medicare patients does Leana Chien see?
CMS counts 35 Medicare patients who saw Leana Chien in 2024, with an average age of 76.
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What services does Leana Chien bill to Medicare?
In 2024, Leana Chien's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and medicare service (G2212).
Has Leana Chien received payments from drug or device companies?
CMS Open Payments shows $1,580 in general payments to Leana Chien from 14 companies from 2024 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Leana Chien been practicing?
Leana Chien graduated from medical school in 2008, 18 years ago.
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