Dr. Mary R. Kwaan, MD, MPH

  • Los Angeles, CA
  • Colorectal surgeon
NPI1588732911PAC ID1456404870
Medicare services, 2024
242
Medicare patients, 2024
158
Part D claims, 2024
124
Publications
25
MIPS score, 2024
93
Practice address
200 Medical Plz, Los Angeles, CA 90024
Practice phone
Call (310) 794-9206
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Peter Morton UCLA Medical Building

Los Angeles, California

See all 6 affiliations

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Dr. Mary R. Kwaan is a colorectal surgeon in Los Angeles, California

Dr. Kwaan practices at Peter Morton UCLA Medical Building in Los Angeles, California.

Dr. Kwaan's NPI, 1588732911, was assigned on December 2, 2006. Dr. Kwaan graduated from Harvard Medical School in 2001. Dr. Kwaan holds California license C154058.

NPI and contact details
Medicare PAC ID
1456404870
NPI enumeration date
December 2, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(310) 794-9206
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Female
Estimated age
51
Medical school graduation
2001

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Mary R. Kwaan practices at Peter Morton UCLA Medical Building in Los Angeles, California

Dr. Kwaan's primary practice is Peter Morton UCLA Medical Building, at 200 Medical Plz, Los Angeles, CA 90024 in Los Angeles County. The practice phone is (310) 794-9206.

  • Peter Morton UCLA Medical Building
    200 Medical Plz, Los Angeles, CA 90024 · Los Angeles CountyPhone(310) 794-9206

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Mary R. Kwaan is affiliated with 5 sites of care and 1 medical group

Dr. Kwaan's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Dr. Kwaan is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is UCLA Associated General Surgeons. Dmand AI also links Dr. Kwaan to 1 more hospital, 1 group practice or clinic and 1 home health agency, each named with a free account.

See all 6 affiliations for Dr. Kwaan

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Mary R. Kwaan's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kwaan practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Peter Morton UCLA Medical BuildingAvailable with a free account
+4 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Mary R. Kwaan is one of 187 colorectal surgeons in California

Colon and rectal surgery is Dr. Kwaan's primary specialty in the NPI Registry, under taxonomy code 208C00000X. Dr. Kwaan is board certified in colon & rectal surgery by the American Board of Colon and Rectal Surgery. Dmand AI has Dr. Kwaan's licenses on file in 3 states: California, Minnesota and Massachusetts.

Specialties and state licenses

  • Colon and rectal surgery, CaliforniaPrimaryLicense C154058 · 2018 to 2026 · taxonomy 208C00000X
  • Minnesota license2009 to 2018
  • Massachusetts license2003 to 2015

Clinical focus

Dmand AI lists colonoscopy, colon removal, gastrointestinal bleeding, gastrointestinal obstruction, hemorrhoids and intestinal or bowel obstruction among the conditions Dr. Kwaan treats.

Colorectal surgeons near Dr. Kwaan

Counts of colorectal 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. Mary R. Kwaan billed Medicare for 242 services in 2024

CMS data shows 242 Medicare services from Dr. Kwaan across 7 procedure codes in 2024, for 158 Medicare patients. Medicare paid $27,457 for them. Every service was in an office.

Medicare services, 2024242
Medicare patients158
Paid by Medicare$27,457
Procedure codes7

Dr. Kwaan's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1702024: 1753%
Surgery
2023: 692024: 673%

Dr. Kwaan compared with the California median for colorectal surgeons, 2024

  • Dr. Kwaan
  • California median
Medicare services
242vs 27010% below
Medicare patients
158vs 155Close to median
Part D claims
66vs 717% below

Medians across 175 colorectal surgeons in California with Dmand AI profiles that report each measure.

Dr. Kwaan'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.

See all procedures by Dr. Kwaan

Need commercial claims for Dr. Kwaan?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kwaan and other colorectal surgeons in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Mary R. Kwaan treated 158 Medicare patients in 2024, average age 74

CMS counts 158 Medicare patients who saw Dr. Kwaan in 2024. The largest group is 65 to 74, with 69 patients. 75% of them have high cholesterol, and 68% have high blood pressure. 23% are also on Medicaid. Their average risk score is 1.71, 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. Kwaan's median patient age at 54, with 54% women.

Medicare patients, 2024158
Average age74
Average risk score1.71
Also on Medicaid23%

Dr. Kwaan's Medicare patients by age, 2024

Dr. Kwaan's Medicare patients by sex, 2024

  • Women9661%
  • Men6239%

Chronic conditions among Dr. Kwaan's Medicare patients, 2024

  1. High cholesterol75%
  2. High blood pressure68%
  3. Arthritis58%
  4. Cancer36%
  5. Ischemic heart disease34%
  6. Anxiety32%
  7. Mood disorders32%
  8. Depression30%

Share of Medicare patients with each condition. A patient can have several.

Dr. Kwaan's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 54

Patient panel by sex, all payers

  • Women54%
  • Men45%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Mary R. Kwaan wrote 124 Medicare Part D claims in 2024

In 2024, Dr. Kwaan wrote 124 Medicare Part D claims for 49 patients. 96% of them were for generic drugs. CMS names the drug for 66 of them, across 3 drugs with 11 or more claims each, at $880 in total drug cost. In 2023, CMS named 47 claims across 3 drugs.

Part D claims, 2024124
Drugs named by CMS3
Total drug cost$880
Part D patients49

Dr. Kwaan's Part D claims by kind of drug, 2024

  • Generic119 claims96%
  • Brand-name and other5 claims4%

Dr. Kwaan'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. Kwaan's Part D claims, 2024

  • Opioids12%15 of 124 claims
  • Antibiotics42%52 of 124 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: 472024: 6640%

Drugs named by CMS: 3 in 2024, 3 in 2023.

See all prescribing by Dr. Kwaan

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. Mary R. Kwaan 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. Kwaan for performance year 2024, reported as part of a group. Dr. Kwaan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kwaan as offering telehealth. CMS counts 19 procedures of colonoscopy by Dr. Kwaan, more than 47% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Kwaan's 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.

Where Dr. Kwaan ranks in Medicare procedure volume

Colonoscopy
47th percentile19 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

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. Mary R. Kwaan has 25 publications on record

Dmand AI links 25 papers to Dr. Kwaan, published from 2011 to 2022. 2013 was the busiest year, with 4. Dr. Kwaan's most frequent co-authors are Robert David Madoff, MD, David A. Rothenberger, MD and Christopher Jen-Hung Chow, MD.

Papers25
Years published2011 to 2022

Dr. Kwaan's papers by year, 2011 to 2022

Dr. Kwaan's most frequent co-authors

Recent publications by Dr. Kwaan

See all 25 publications and co-authors

See who Dr. Kwaan researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kwaan works with, so you can find a warm path to the right colorectal surgeons.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Mary R. Kwaan received $323 in industry payments from 2019 to 2022

CMS Open Payments shows 3 general payments to Dr. Kwaan from 3 drug and device companies from 2019 to 2022. Food and beverage make up the largest share, 100% of the total. Prescient Surgical paid the most, $274.

General payments to Dr. Kwaan by program year, 2019 to 2022

Companies that paid Dr. Kwaan the most, 2019 to 2022

Share is of all general payments to this clinician.

See all payments to Dr. Kwaan

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Mary R. Kwaan graduated from Harvard Medical School

Dr. Kwaan graduated from Harvard Medical School in 2001.

  1. Medical schoolHarvard Medical School
  2. Board certified in colon & rectal surgeryAmerican Board of Colon and Rectal Surgery
  3. Board certified in surgeryAmerican Board of Surgery

Source: Dmand AI Professional Profile Data

Dr. Mary R. Kwaan accepts plans from 14 insurance carriers

Dr. Kwaan is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Elevance
  • Regence Health Plans
  • Alliant Health Plans
  • +6 more carriersWith a free account

Plan types Dr. Kwaan accepts, by number of carriers

  1. HMO7
  2. Medicare7
  3. PPO7
  4. EPO4
  5. POS3
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Mary R. Kwaan'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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
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 Dr. Mary R. Kwaan

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. Mary R. Kwaan's NPI number?

Dr. Mary R. Kwaan's NPI number is 1588732911. It was assigned on December 2, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Mary R. Kwaan?

Dr. Mary R. Kwaan is a colorectal surgeon in Los Angeles, California. The primary specialty in the NPI Registry is Colon & Rectal Surgery Physician (taxonomy code 208C00000X).

Where does Dr. Mary R. Kwaan practice?

Dr. Kwaan practices at 200 Medical Plz, Los Angeles, CA 90024. Dr. Kwaan's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Dmand AI also links Dr. Kwaan to 1 hospital, 1 group practice or clinic and 1 home health agency.

What is Dr. Mary R. Kwaan's office phone number?

The practice phone on file for Dr. Kwaan is (310) 794-9206.

What is Dr. Mary R. Kwaan's medical license number?

Dr. Kwaan holds California license C154058, one of the licenses on file in 3 states.

Which states has Dr. Mary R. Kwaan been licensed in?

Dmand AI has state licenses on file for Dr. Kwaan in California (2018 to 2026), Minnesota (2009 to 2018) and Massachusetts (2003 to 2015).

Which hospitals is Dr. Mary R. Kwaan affiliated with?

Dr. Kwaan is affiliated with Ronald Reagan UCLA Medical Center. Dmand AI links Dr. Kwaan to 1 more hospital.

What medical group is Dr. Mary R. Kwaan part of?

Dr. Kwaan is linked to UCLA Associated General Surgeons.

Does Dr. Mary R. Kwaan accept Medicare?

Yes. CMS data shows Dr. Kwaan billed Medicare for 242 services in 2024, and Dr. Kwaan accepts Medicare assignment.

Does Dr. Mary R. Kwaan offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Kwaan as offering telehealth services.

Show 11 more questionsShow fewer questions

What is Dr. Mary R. Kwaan's MIPS score?

Dr. Kwaan's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.

How many Medicare patients does Dr. Mary R. Kwaan see?

CMS counts 158 Medicare patients who saw Dr. Kwaan in 2024, with an average age of 74.

Is Dr. Mary R. Kwaan board certified?

Yes. Dr. Kwaan is board certified in colon & rectal surgery by the American Board of Colon and Rectal Surgery.

What services does Dr. Mary R. Kwaan bill to Medicare?

In 2024, Dr. Kwaan's most billed Medicare services were surgery: digestive system (46600), office visit, established patient (99214) and office visit, established patient (99213).

Where did Dr. Mary R. Kwaan go to medical school?

Dr. Kwaan graduated from Harvard Medical School in 2001.

What drugs does Dr. Mary R. Kwaan prescribe most?

In 2024 Medicare Part D data, Dr. Kwaan's most prescribed drugs by claims were Metronidazole, Neomycin Sulfate and Lidocaine.

Has Dr. Mary R. Kwaan received payments from drug or device companies?

CMS Open Payments shows $323 in general payments to Dr. Kwaan from 3 companies from 2019 to 2022. The largest total came from Prescient Surgical.

How long has Dr. Mary R. Kwaan been practicing?

Dr. Kwaan graduated from medical school in 2001, 25 years ago.

Does Dr. Mary R. Kwaan do research?

Dmand AI links 25 publications to Dr. Kwaan, published from 2011 to 2022.

Who does Dr. Mary R. Kwaan publish with?

Dr. Kwaan's most frequent co-authors are Robert David Madoff, MD (8 shared papers), David A. Rothenberger, MD (6 shared papers) and Christopher Jen-Hung Chow, MD (4 shared papers).

What insurance does Dr. Mary R. Kwaan accept?

Dr. Kwaan is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.

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