Christina Lien

  • El Segundo, CA
  • General surgeon
NPI1972998326PAC ID1850786047
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
Social profiles

Primary practice

House Medicine

El Segundo, California

See all 5 affiliations

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.

View contacts for free

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 and contact details
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 Medicine
    2040 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.

See all 5 affiliations for Christina Lien

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.

EHR by site
SiteEHR vendor and product
House MedicineAvailable with a free account
+2 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

See the EHR and IT leaders at every site where Christina Lien practices

Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.

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, CaliforniaPrimaryLicense 20A15099 · taxonomy 208600000X

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.

Medicare services, 202327
Medicare patients31
Paid by Medicare$2,546
Procedure codes1

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.

See all procedures by Christina Lien

Need commercial claims for Christina Lien?

Medicare shows one payer. Book a meeting to get commercial claims data for Christina Lien and other general surgeons in California.

Book a meeting

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.

Medicare patients, 202431
Average age73
Average risk score1.37
Also on Medicaid45%

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

  1. High blood pressure75%
  2. High cholesterol71%
  3. Cancer68%
  4. Arthritis42%
  5. 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.

Part D claims, 202475
Drugs named by CMS2
Total drug cost$101
Part D patients41

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.

See all prescribing by Christina Lien

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)

For MedTech and pharma teams

Find general surgeons like Christina Lien by procedure volume and prescribing

Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.

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

$841in total
  • 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.

See all payments to Christina Lien

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.

  1. Medical schoolWesternU College of Osteopathic Medicine of the Pacific
  2. Board certified in surgeryAmerican Board of Surgery
  3. Board certified in 2016 - 2025CA State License
  4. Board certified in 2020 - 2023IL State License

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.

Plan types Christina Lien accepts, by number of carriers

  1. Medicare10
  2. PPO8
  3. HMO6
  4. POS4
  5. EPO2
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Christina Lien's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors 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 paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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.

Selling to surgery practices?

See general surgeons in California by site of care and group

Find the practices, groups and hospitals they work with, and the right people to contact at each.

  • 30 days free
  • Self-serve
  • No credit card

Cookie settings

Turn each category on or off. Your choice is kept for 12 months and you can change it here at any time.

Necessary

Always on. Sign-in, security, downloads you asked for, your cookie choice, and the page that led to a signup.

View cookies (6)
  • dm_consentDmand AI. Your cookie choices and whether your browser sent a Global Privacy Control signal. 12 months.
  • dm_ft, dm_ltDmand AI. The first and the latest page you arrived on, with the date, so a signup is credited to the page that worked. 90 days, 30 days.
  • dm_fs, dm_lsDmand AI. The first and the latest source of a visit (a search engine, a campaign or the site that linked here). 90 days, 30 days.
  • dm_dl, dm_dl_okDmand AI. After you give an email address for a download, lets you download files without being asked again. 30 days.
  • Session and CSRF cookiesDmand AI (app.dmand.ai). Sign-in and form protection in the application. Session.
  • __cf_bm, cf_clearanceCloudflare. Tells people from automated traffic and keeps the site available. 30 minutes; cf_clearance while a security check is valid.

Analytics

On unless you turn it off. How pages are used, in aggregate, and recordings of how pages are used.

View cookies (6)
  • Google Tag ManagerGoogle. Loads the analytics and marketing tags that are on. Sets no cookie of its own and does not load when both categories are off. n/a.
  • _ga, _ga_<container-id>Google Analytics 4. Visits and page views in aggregate on dmand.ai. 2 years.
  • _clck, _clskMicrosoft Clarity. Recordings and heatmaps of how pages are used, with form fields masked. 1 year, 1 day.
  • CLID, MUID, ANONCHK, MR, SMMicrosoft (clarity.ms). Set by Microsoft when Clarity loads, to recognize a browser across sites that use Clarity. Up to 1 year.
  • None (cookieless)Ahrefs Analytics. Page views in aggregate. n/a.
  • ph_<project>_posthogPostHog. Product usage, errors and performance in app.dmand.ai, used to fix bugs and improve features. 365 days.

Marketing

On unless you turn it off, and always off when your browser sends a Global Privacy Control signal. A visitor identification service tells our sales team which companies and people visit.

View cookies (6)
  • _reb2buid, _reb2butkRB2B. Recognizes a returning browser for visitor identification. 360 days, 1 year.
  • _reb2bgeoRB2B. The location used to decide whether a visit can be identified. 20 days.
  • _reb2brefRB2B. The page or site that referred the visit. 15 days.
  • _reb2bfxf, _reb2btd, _reb2bliRB2B. Links the visit to an identified business profile. 1 month.
  • _reb2bresolveRB2B. Holds a match while it is being resolved. 2 days.
  • _reb2sessionID, _reb2bloadedRB2B. The current visit, and a guard against loading the script twice. 30 minutes, 1 second.

Functional

On unless you turn it off. Remembers choices such as a collapsed section.

View cookies (none today)