Christina Lien
- Medicare services, 2023
- 27
- Medicare patients, 2024
- 31
- Part D claims, 2024
- 75
- MIPS score, 2024
- 88
- Industry payments
- $841
- Practice address
- 2040 E Mariposa Ave, El Segundo, CA 90245
- Practice phone
- Call (310) 400-0645
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
House Medicine
El Segundo, California
Find Christina Lien'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.
Christina Lien is a general surgeon in El Segundo, California
Christina Lien practices at House Medicine in El Segundo, California.
Christina Lien's NPI, 1972998326, was assigned on April 2, 2015. Christina Lien graduated from WesternU College of Osteopathic Medicine of the Pacific in 2015. Christina Lien holds California license 20A15099.
- NPI
- 1972998326NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850786047
- NPI enumeration date
- April 2, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 400-0645
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Christina Lien practices at House Medicine in El Segundo, California
Christina Lien's primary practice is House Medicine, at 2040 E Mariposa Ave, El Segundo, CA 90245 in Los Angeles County. The practice phone is (310) 400-0645.
- House Medicine2040 E Mariposa Ave, El Segundo, CA 90245 · Los Angeles CountyPhone(310) 400-0645
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Christina Lien is affiliated with 3 sites of care and 2 medical groups
Christina Lien's primary practice is House Medicine in El Segundo, California. The medical group on file is House Medicine. Dmand AI also links Christina Lien to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Christina Lien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Christina Lien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| House Medicine | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Christina Lien is one of 2,926 general surgeons in California
Surgery is Christina Lien's primary specialty in the NPI Registry, under taxonomy code 208600000X. Christina Lien is board certified in surgery by the American Board of Surgery. Christina Lien is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists groin hernia surgery and mastectomy among the conditions Christina Lien treats.
General surgeons near Christina Lien
Counts of general surgeons 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
Christina Lien billed Medicare for 27 services in 2023
CMS data shows 27 Medicare services from Christina Lien across 1 procedure code in 2023, all of them office visits, for 31 Medicare patients. Medicare paid $2,546 for them. Every service was in an office.
Christina Lien compared with the California median for general surgeons, 2023
- Christina Lien
- California median
- Medicare services
- 27vs 16684% below
- Medicare patients
- 31vs 12174% below
- Part D claims
- 40vs 3418% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Christina Lien's most billed Medicare procedure codes, 2023
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 Christina Lien and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Christina Lien treated 31 Medicare patients in 2024, average age 73
CMS counts 31 Medicare patients who saw Christina Lien in 2024. The largest group is 65 to 74, with 18 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 45% are also on Medicaid. Their average risk score is 1.37, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Christina Lien's median patient age at 59, with 73% women.
Christina Lien's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Christina Lien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Cancer68%
- Arthritis42%
- Diabetes35%
Share of Medicare patients with each condition. A patient can have several.
Christina Lien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women73%
- Men26%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Christina Lien wrote 75 Medicare Part D claims in 2024
In 2024, Christina Lien wrote 75 Medicare Part D claims for 41 patients. 100% of them were for generic drugs. CMS names the drug for 40 of them, across 2 drugs with 11 or more claims each, at $101 in total drug cost. In 2023, CMS named 84 claims across 4 drugs.
Christina Lien'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 Christina Lien's Part D claims, 2024
- Opioids43%32 of 75 claims
- Antibiotics24%18 of 75 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: 842024: 4052%
Drugs named by CMS: 2 in 2024, 4 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
Christina Lien scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Christina Lien for performance year 2024, reported as part of a group. Christina Lien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Christina Lien's MIPS scores, performance year 2024
- 88of 100Final score
- 77.5of 100Quality
- 40of 100Improvement Activities
- 58of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Mastectomy: 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Christina Lien received $841 in industry payments from 2020 to 2024
CMS Open Payments shows 11 general payments to Christina Lien from 8 drug and device companies from 2020 to 2024. Consulting fees make up the largest share, 52% of the total. Applied Medical Resources Corporation paid the most, $438.
General payments to Christina Lien by program year, 2020 to 2024
General payments to Christina Lien by kind, 2020 to 2024
- Consulting fees$43852%
- Food and beverage$40448%
Companies that paid Christina Lien the most, 2020 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Christina Lien graduated from WesternU College of Osteopathic Medicine of the Pacific
Christina Lien graduated from WesternU College of Osteopathic Medicine of the Pacific in 2015.
- Medical school
- Board certified in surgery
- Board certified in 2016 - 2025
- Board certified in 2020 - 2023
Source: Dmand AI Professional Profile Data
Christina Lien accepts plans from 13 insurance carriers
Christina Lien is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Humana
- LA Care
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- +5 more carriersWith a free account
Plan types Christina Lien accepts, by number of carriers
- Medicare10
- PPO8
- HMO6
- POS4
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Christina Lien'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 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)Doctors and Clinicians Utilization Data (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 Christina Lien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Christina Lien's NPI number?
Christina Lien's NPI number is 1972998326. It was assigned on April 2, 2015, and it is active in the NPI Registry.
What does Christina Lien specialize in?
Christina Lien is a general surgeon in El Segundo, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Christina Lien practice?
Christina Lien practices at 2040 E Mariposa Ave, El Segundo, CA 90245. Christina Lien's primary practice is House Medicine in El Segundo, California. Dmand AI also links Christina Lien to 2 group practices and clinics and 1 medical group.
What is Christina Lien's office phone number?
The practice phone on file for Christina Lien is (310) 400-0645.
What is Christina Lien's medical license number?
Christina Lien holds California license 20A15099.
What medical group is Christina Lien part of?
Christina Lien is linked to House Medicine. Dmand AI links Christina Lien to 1 more medical group.
Does Christina Lien accept Medicare?
Yes. CMS data shows Christina Lien billed Medicare for 27 services in 2023, and Christina Lien accepts Medicare assignment.
What is Christina Lien's MIPS score?
Christina Lien's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
How many Medicare patients does Christina Lien see?
CMS counts 31 Medicare patients who saw Christina Lien in 2024, with an average age of 73.
Is Christina Lien board certified?
Yes. Christina Lien is board certified in surgery by the American Board of Surgery.
Show 6 more questionsShow fewer questions
What services does Christina Lien bill to Medicare?
In 2023, Christina Lien's most billed Medicare services were office visit, established patient (99214).
Where did Christina Lien go to medical school?
Christina Lien graduated from WesternU College of Osteopathic Medicine of the Pacific in 2015.
What drugs does Christina Lien prescribe most?
In 2024 Medicare Part D data, Christina Lien's most prescribed drugs by claims were Tramadol HCl and Ibuprofen.
Has Christina Lien received payments from drug or device companies?
CMS Open Payments shows $841 in general payments to Christina Lien from 8 companies from 2020 to 2024. The largest total came from Applied Medical Resources Corporation.
How long has Christina Lien been practicing?
Christina Lien graduated from medical school in 2015, 11 years ago.
What insurance does Christina Lien accept?
Christina Lien is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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