Dr. Katherine Kar-Hwee Quan, MD
- Medicare services, 2024
- 500
- Medicare patients, 2024
- 263
- Part D claims, 2024
- 41
- MIPS score, 2024
- 87
- Industry payments
- $916
- Practice address
- 1100 S Dobson Rd Suite 223 Suite 223, Chandler, AZ 85286-6160
- Practice phone
- Call (480) 821-8888
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
East Valley Dermatology Center
Dermatology practice · Chandler, Arizona
Find Dr. Quan'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.
Dr. Katherine Kar-Hwee Quan is a mohs-micrographic surgery physician in Chandler, Arizona
Dr. Quan practices at East Valley Dermatology Center in Chandler, Arizona.
Dr. Quan's NPI, 1629051917, was assigned on November 21, 2005. Dr. Quan graduated from Northwestern University Feinberg Medical School in 1992. Dr. Quan holds Arizona license 25345.
- NPI
- 1629051917NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921145921
- NPI enumeration date
- November 21, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 821-8888
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Katherine Kar-Hwee Quan practices at East Valley Dermatology Center in Chandler, Arizona
Dr. Quan's primary practice is East Valley Dermatology Center, at 1100 S Dobson Rd Suite 223 Suite 223, Chandler, AZ 85286-6160. The practice phone is (480) 821-8888.
- East Valley Dermatology Center1100 S Dobson Rd Suite 223 Suite 223, Chandler, AZ 85286-6160Phone(480) 821-8888
Source: Dmand AI Affiliation Data
Dr. Katherine Kar-Hwee Quan is affiliated with 1 site of care and 1 medical group
Dr. Quan's primary practice is East Valley Dermatology Center in Chandler, Arizona. The medical group on file is East Valley Dermatology Center.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Katherine Kar-Hwee Quan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Quan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| East Valley Dermatology Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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.
Dr. Katherine Kar-Hwee Quan is one of 41 mohs-micrographic surgery physicians in Arizona
Mohs-micrographic surgery is Dr. Quan's primary specialty in the NPI Registry, under taxonomy code 207ND0101X. Dr. Quan is licensed in Arizona.
Specialties and state licenses
- Mohs-micrographic surgery, ArizonaPrimary
Mohs-micrographic surgery physicians near Dr. Quan
Counts of mohs-micrographic surgery physicians 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. Katherine Kar-Hwee Quan billed Medicare for 500 services in 2024
CMS data shows 500 Medicare services from Dr. Quan across 8 procedure codes in 2024, for 263 Medicare patients. Medicare paid $168,830 for them. Every service was in an office.
Dr. Quan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 5392024: 47212%
- Office and hospital visits
- 2023: 282024: 28No change
Dr. Quan compared with the Arizona median for mohs-micrographic surgery physicians, 2024
- Dr. Quan
- Arizona median
- Medicare services
- 500vs 2,58181% below
- Medicare patients
- 263vs 67661% below
- Part D claims
- 32vs 36991% below
Medians across 41 mohs-micrographic surgery physicians in Arizona with Dmand AI profiles that report each measure.
Dr. Quan'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.
Need commercial claims for Dr. Quan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Quan and other mohs-micrographic surgery physicians in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Katherine Kar-Hwee Quan treated 263 Medicare patients in 2024, average age 78
CMS counts 263 Medicare patients who saw Dr. Quan in 2024. The largest group is 75 to 84, with 130 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.15, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Quan's median patient age at 77, with 43% women.
Dr. Quan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Quan's Medicare patients by sex, 2024
- Women10941%
- Men15459%
Chronic conditions among Dr. Quan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Ischemic heart disease35%
- Chronic kidney disease31%
- Cancer22%
- Diabetes22%
- Anxiety19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Quan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women43%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Katherine Kar-Hwee Quan wrote 41 Medicare Part D claims in 2024
In 2024, Dr. Quan wrote 41 Medicare Part D claims for 37 patients. 100% of them were for generic drugs. CMS names the drug for 32 of them, across 1 drug with 11 or more claims each, at $121 in total drug cost. In 2023, CMS named 31 claims across 1 drug.
Dr. Quan'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. Quan's Part D claims, 2024
- Antibiotics83%34 of 41 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: 312024: 323%
Drugs named by CMS: 1 in 2024, 1 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
Dr. Katherine Kar-Hwee Quan scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Quan for performance year 2024, reported as part of a group. Dr. Quan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 38 procedures of melanoma (skin cancer) excision by Dr. Quan, more than 83% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Quan's MIPS scores, performance year 2024
- 87of 100Final score
- 88.2of 100Quality
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Quan ranks in Medicare procedure volume
- Removal of skin cancer
- 50th percentile377 procedures
- Melanoma (skin cancer) excision
- 83rd percentile38 procedures
- Removal of skin lesions
- 60th percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Skin biopsy: 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
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Katherine Kar-Hwee Quan received $916 in industry payments from 2016 to 2025
CMS Open Payments shows 51 general payments to Dr. Quan from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Celgene Corporation paid the most, $168.
General payments to Dr. Quan by program year, 2016 to 2025
Companies that paid Dr. Quan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Katherine Kar-Hwee Quan graduated from Northwestern University Feinberg Medical School
Dr. Quan graduated from Northwestern University Feinberg Medical School in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Katherine Kar-Hwee Quan'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 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 |
| 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. Katherine Kar-Hwee Quan
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. Katherine Kar-Hwee Quan's NPI number?
Dr. Katherine Kar-Hwee Quan's NPI number is 1629051917. It was assigned on November 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Katherine Kar-Hwee Quan?
Dr. Katherine Kar-Hwee Quan is a mohs-micrographic surgery physician in Chandler, Arizona. The primary specialty in the NPI Registry is MOHS-Micrographic Surgery Physician (taxonomy code 207ND0101X).
Where does Dr. Katherine Kar-Hwee Quan practice?
Dr. Quan practices at 1100 S Dobson Rd Suite 223 Suite 223, Chandler, AZ 85286-6160. Dr. Quan's primary practice is East Valley Dermatology Center in Chandler, Arizona.
What is Dr. Katherine Kar-Hwee Quan's office phone number?
The practice phone on file for Dr. Quan is (480) 821-8888.
What is Dr. Katherine Kar-Hwee Quan's medical license number?
Dr. Quan holds Arizona license 25345.
What medical group is Dr. Katherine Kar-Hwee Quan part of?
Dr. Quan is linked to East Valley Dermatology Center.
Does Dr. Katherine Kar-Hwee Quan accept Medicare?
Yes. CMS data shows Dr. Quan billed Medicare for 500 services in 2024, and Dr. Quan accepts Medicare assignment.
What is Dr. Katherine Kar-Hwee Quan's MIPS score?
Dr. Quan's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
How many Medicare patients does Dr. Katherine Kar-Hwee Quan see?
CMS counts 263 Medicare patients who saw Dr. Quan in 2024, with an average age of 78.
What services does Dr. Katherine Kar-Hwee Quan bill to Medicare?
In 2024, Dr. Quan's most billed Medicare services were surgery: skin and soft tissue (17311), surgery: skin and soft tissue (17312) and surgery: skin and soft tissue (17313).
Show 4 more questionsShow fewer questions
Where did Dr. Katherine Kar-Hwee Quan go to medical school?
Dr. Quan graduated from Northwestern University Feinberg Medical School in 1992.
What drugs does Dr. Katherine Kar-Hwee Quan prescribe most?
In 2024 Medicare Part D data, Dr. Quan's most prescribed drugs by claims were Cephalexin.
Has Dr. Katherine Kar-Hwee Quan received payments from drug or device companies?
CMS Open Payments shows $916 in general payments to Dr. Quan from 18 companies from 2016 to 2025. The largest total came from Celgene Corporation.
How long has Dr. Katherine Kar-Hwee Quan been practicing?
Dr. Quan graduated from medical school in 1992, 34 years ago.
Selling to mohs-micrographic surgery practices?
See mohs-micrographic surgery physicians in Arizona 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