Dr. Catherine E. Lewis, MD
- Medicare services, 2024
- 323
- Medicare patients, 2024
- 189
- Publications
- 3
- MIPS score, 2024
- 93
- Hospital affiliations
- 1
- Practice address
- 757 Westwood Plaza, Los Angeles, CA 90095
- Practice phone
- Call (310) 825-6301
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lewis' 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. Catherine E. Lewis is a general surgeon in Los Angeles, California
Dr. Lewis practices at Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health.
Dr. Lewis' NPI, 1215165857, was assigned on June 22, 2009. Dr. Lewis graduated from University Of Michigan Medical School in 2005. Dr. Lewis holds California license A100217.
- NPI
- 1215165857NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537395660
- NPI enumeration date
- June 22, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 825-6301
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Catherine E. Lewis practices at Ronald Reagan UCLA Medical Center in Los Angeles, California
Dr. Lewis' primary practice is Ronald Reagan UCLA Medical Center, at 757 Westwood Plaza, Los Angeles, CA 90095 in Los Angeles County. The practice phone is (310) 825-6301.
- Ronald Reagan UCLA Medical Center757 Westwood Plaza, Los Angeles, CA 90095 · Los Angeles CountyPhone(310) 825-6301
Source: Dmand AI Affiliation Data
Dr. Catherine E. Lewis is affiliated with 2 sites of care and 1 medical group
Dr. Lewis' primary practice is Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health. The medical group on file is UCLA Associated General Surgeons. Dmand AI also links Dr. Lewis to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Catherine E. Lewis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lewis practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ronald Reagan UCLA Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Catherine E. Lewis is one of 2,926 general surgeons in California
Surgery is Dr. Lewis' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Lewis is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Lewis' licenses on file in 2 states: California and Washington.
Specialties and state licenses
- Surgery, CaliforniaPrimary
- Washington license
Clinical focus
Dmand AI lists acute gallbladder or bile duct inflammation, appendectomy, esophagus, stomach, or upper small intestine surgery, gallbladder removal, gastrointestinal obstruction and multiple traumatic injuries among the conditions Dr. Lewis treats.
General surgeons near Dr. Lewis
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
Dr. Catherine E. Lewis billed Medicare for 323 services in 2024
CMS data shows 323 Medicare services from Dr. Lewis across 5 procedure codes in 2024, for 189 Medicare patients. Medicare paid $34,255 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lewis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3422024: 3236%
Dr. Lewis compared with the California median for general surgeons, 2024
- Dr. Lewis
- California median
- Medicare services
- 323vs 16695% above
- Medicare patients
- 189vs 12156% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Lewis' 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. Lewis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lewis and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Catherine E. Lewis treated 189 Medicare patients in 2024, average age 74
CMS counts 189 Medicare patients who saw Dr. Lewis in 2024. The largest group is 65 to 74, with 66 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 40% are also on Medicaid. Their average risk score is 2.87, 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. Lewis' median patient age at 47, with 36% women.
Dr. Lewis' Medicare patients by age, 2024
Dr. Lewis' Medicare patients by sex, 2024
- Women8847%
- Men10153%
Chronic conditions among Dr. Lewis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Ischemic heart disease48%
- Diabetes47%
- Chronic kidney disease44%
- Anxiety41%
- Heart failure41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lewis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women36%
- Men62%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Catherine E. Lewis 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 Dr. Lewis for performance year 2024, reported as part of a group. Dr. Lewis accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Lewis' MIPS scores, performance year 2024
- 93of 100Final score
- 69.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 82of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Removal of tissue: 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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Dr. Catherine E. Lewis has 3 publications on record
Dmand AI links 3 papers to Dr. Lewis, published from 2016 to 2018. Dr. Lewis' most frequent co-authors are Areti Tillou, MD, Vatche Garen Agopian, MD and Ronald W. Busuttil, MD.
Dr. Lewis' most frequent co-authors
- Areti Tillou, MD2 shared papers
- Vatche Garen Agopian, MD1 shared paper
- Ronald W. Busuttil, MD1 shared paper
Recent publications by Dr. Lewis
See who Dr. Lewis researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Lewis works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Catherine E. Lewis received $133 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Lewis from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Davol Inc. paid the most, $133.
Companies that paid Dr. Lewis the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Catherine E. Lewis graduated from University Of Michigan Medical School
Dr. Lewis graduated from University Of Michigan Medical School in 2005.
- Medical school
- Board certified in surgery
- Board certified in surgical critical care
Source: Dmand AI Professional Profile Data
Dr. Catherine E. Lewis accepts plans from 7 insurance carriers
Dr. Lewis is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- LA Care
Plan types Dr. Lewis accepts, by number of carriers
- Medicare6
- PPO5
- HMO3
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Catherine E. Lewis'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) |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Catherine E. Lewis
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. Catherine E. Lewis' NPI number?
Dr. Catherine E. Lewis' NPI number is 1215165857. It was assigned on June 22, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Catherine E. Lewis?
Dr. Catherine E. Lewis is a general surgeon in Los Angeles, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Catherine E. Lewis practice?
Dr. Lewis practices at 757 Westwood Plaza, Los Angeles, CA 90095. Dr. Lewis' primary practice is Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health. Dmand AI also links Dr. Lewis to 1 group practice or clinic.
What is Dr. Catherine E. Lewis' office phone number?
The practice phone on file for Dr. Lewis is (310) 825-6301.
What is Dr. Catherine E. Lewis' medical license number?
Dr. Lewis holds California license A100217, one of the licenses on file in 2 states.
Which states has Dr. Catherine E. Lewis been licensed in?
Dmand AI has state licenses on file for Dr. Lewis in California (2007 to 2026) and Washington (since 2013).
Which hospitals is Dr. Catherine E. Lewis affiliated with?
Dr. Lewis practices at Ronald Reagan UCLA Medical Center in Los Angeles, California.
What medical group is Dr. Catherine E. Lewis part of?
Dr. Lewis is linked to UCLA Associated General Surgeons.
Does Dr. Catherine E. Lewis accept Medicare?
Yes. CMS data shows Dr. Lewis billed Medicare for 323 services in 2024, and Dr. Lewis accepts Medicare assignment.
What is Dr. Catherine E. Lewis' MIPS score?
Dr. Lewis' MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Catherine E. Lewis see?
CMS counts 189 Medicare patients who saw Dr. Lewis in 2024, with an average age of 74.
Is Dr. Catherine E. Lewis board certified?
Yes. Dr. Lewis is board certified in surgery by the American Board of Surgery.
What services does Dr. Catherine E. Lewis bill to Medicare?
In 2024, Dr. Lewis' most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99223) and hospital inpatient care (99232).
Where did Dr. Catherine E. Lewis go to medical school?
Dr. Lewis graduated from University Of Michigan Medical School in 2005.
Has Dr. Catherine E. Lewis received payments from drug or device companies?
CMS Open Payments shows $133 in general payments to Dr. Lewis from 1 company from 2024 to 2024. The largest total came from Davol Inc.
How long has Dr. Catherine E. Lewis been practicing?
Dr. Lewis graduated from medical school in 2005, 21 years ago.
Does Dr. Catherine E. Lewis do research?
Dmand AI links 3 publications to Dr. Lewis, published from 2016 to 2018.
Who does Dr. Catherine E. Lewis publish with?
Dr. Lewis' most frequent co-authors are Areti Tillou, MD (2 shared papers), Vatche Garen Agopian, MD (1 shared paper) and Ronald W. Busuttil, MD (1 shared paper).
What insurance does Dr. Catherine E. Lewis accept?
Dr. Lewis is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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