Dr. Ann Chang Brewer, MD
- Medicare services, 2024
- 1,455
- Medicare patients, 2024
- 301
- Part D claims, 2024
- 238
- Industry payments
- $8,706
- Affiliated sites
- 3
- Practice address
- 30 Kupaoa St, Makawao, HI 96768
- Practice phone
- Call (808) 207-6563
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ann C Brewer MD Inc
Makawao, Hawaii
Find Dr. Brewer'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. Ann Chang Brewer is a dermatologist in Makawao, Hawaii
Dr. Brewer practices at Ann C Brewer MD Inc in Makawao, Hawaii.
Dr. Brewer's NPI, 1235573114, was assigned on April 23, 2013. Dr. Brewer graduated from University of Arizona College of Medicine in 2013. Dr. Brewer holds Montana license 56288.
- NPI
- 1235573114NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779713441
- NPI enumeration date
- April 23, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (808) 207-6563
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ann Chang Brewer practices at Ann C Brewer MD Inc in Makawao, Hawaii
Dr. Brewer's primary practice is Ann C Brewer MD Inc, at 30 Kupaoa St, Makawao, HI 96768 in Maui County. The practice phone is (808) 207-6563.
- Ann C Brewer MD Inc30 Kupaoa St, Makawao, HI 96768 · Maui CountyPhone(808) 207-6563
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ann Chang Brewer is affiliated with 4 sites of care and 3 medical groups
Dr. Brewer's primary practice is Ann C Brewer MD Inc in Makawao, Hawaii. The medical group on file is Maui Skin Clinic. Dmand AI also links Dr. Brewer to 2 more group practices and clinics, 2 medical groups and 1 community health center, 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 Dr. Ann Chang Brewer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brewer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ann C Brewer MD Inc | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ann Chang Brewer is one of 69 dermatologists in Hawaii
Dermatology is Dr. Brewer's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dmand AI has Dr. Brewer's licenses on file in 2 states: Montana and Arizona.
Specialties and state licenses
- Dermatology, MontanaPrimary
- Arizona license
Dermatologists near Dr. Brewer
Counts of dermatologists 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. Ann Chang Brewer billed Medicare for 1,455 services in 2024
CMS data shows 1,455 Medicare services from Dr. Brewer across 14 procedure codes in 2024, for 301 Medicare patients. Medicare paid $68,346 for them. Every service was in an office.
Dr. Brewer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 9952024: 1,0435%
- Office and hospital visits
- 2023: 4072024: 4121%
Dr. Brewer compared with the Hawaii median for dermatologists, 2024
- Dr. Brewer
- Hawaii median
- Medicare services
- 1,455vs 1,395Close to median
- Medicare patients
- 301vs 39424% below
- Part D claims
- 150vs 48669% below
Medians across 67 dermatologists in Hawaii with Dmand AI profiles that report each measure.
Dr. Brewer'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. Brewer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Brewer and other dermatologists in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ann Chang Brewer treated 301 Medicare patients in 2024, average age 73
CMS counts 301 Medicare patients who saw Dr. Brewer in 2024. The largest group is 65 to 74, with 170 patients. 70% of them have high cholesterol, and 52% have high blood pressure. 7% are also on Medicaid. Their average risk score is 0.83, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Brewer's median patient age at 50, with 60% women.
Dr. Brewer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Brewer's Medicare patients by sex, 2024
- Women16555%
- Men13645%
Chronic conditions among Dr. Brewer's Medicare patients, 2024
- High cholesterol70%
- High blood pressure52%
- Arthritis36%
- Ischemic heart disease21%
- Chronic kidney disease16%
- Osteoporosis15%
- Anxiety14%
- Diabetes14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Brewer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 50
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ann Chang Brewer wrote 238 Medicare Part D claims in 2024
In 2024, Dr. Brewer wrote 238 Medicare Part D claims for 119 patients. 93% of them were for generic drugs. CMS names the drug for 150 of them, across 7 drugs with 11 or more claims each, at $80,588 in total drug cost. In 2023, CMS named 208 claims across 7 drugs.
Dr. Brewer's Part D claims by kind of drug, 2024
- Generic222 claims93%
- Brand-name16 claims7%
Dr. Brewer'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. Brewer's Part D claims, 2024
- Antibiotics5%12 of 238 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: 2082024: 15028%
Drugs named by CMS: 7 in 2024, 7 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. Ann Chang Brewer ranks in the 89th percentile for removal of skin lesions in Medicare
Dr. Brewer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 663 procedures of removal of skin lesions by Dr. Brewer, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Brewer ranks in Medicare procedure volume
- Removal of skin lesions
- 89th percentile663 procedures
- Skin biopsy
- 80th percentile146 procedures
- Melanoma (skin cancer) excision
- 75th percentile21 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ann Chang Brewer received $8,706 in industry payments from 2017 to 2025
CMS Open Payments shows 225 general payments to Dr. Brewer from 19 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 75% of the total. UCB, Inc. paid the most, $2,177.
General payments to Dr. Brewer by program year, 2017 to 2025
General payments to Dr. Brewer by kind, 2017 to 2025
- Food and beverage$6,56575%
- Consulting fees$1,95022%
- Education$1922%
Companies that paid Dr. Brewer the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ann Chang Brewer graduated from University of Arizona College of Medicine
Dr. Brewer graduated from University of Arizona College of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ann Chang Brewer'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)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. Ann Chang Brewer
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. Ann Chang Brewer's NPI number?
Dr. Ann Chang Brewer's NPI number is 1235573114. It was assigned on April 23, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Ann Chang Brewer?
Dr. Ann Chang Brewer is a dermatologist in Makawao, Hawaii. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Ann Chang Brewer practice?
Dr. Brewer practices at 30 Kupaoa St, Makawao, HI 96768. Dr. Brewer's primary practice is Ann C Brewer MD Inc in Makawao, Hawaii. Dmand AI also links Dr. Brewer to 2 group practices and clinics, 2 medical groups and 1 community health center.
What is Dr. Ann Chang Brewer's office phone number?
The practice phone on file for Dr. Brewer is (808) 207-6563.
What is Dr. Ann Chang Brewer's medical license number?
Dr. Brewer holds Montana license 56288, one of the licenses on file in 2 states.
Which states has Dr. Ann Chang Brewer been licensed in?
Dmand AI has state licenses on file for Dr. Brewer in Montana and Arizona.
What medical group is Dr. Ann Chang Brewer part of?
Dr. Brewer is linked to Maui Skin Clinic. Dmand AI links Dr. Brewer to 2 more medical groups.
Does Dr. Ann Chang Brewer accept Medicare?
Yes. CMS data shows Dr. Brewer billed Medicare for 1,455 services in 2024, and Dr. Brewer accepts Medicare assignment.
How many Medicare patients does Dr. Ann Chang Brewer see?
CMS counts 301 Medicare patients who saw Dr. Brewer in 2024, with an average age of 73.
What services does Dr. Ann Chang Brewer bill to Medicare?
In 2024, Dr. Brewer's most billed Medicare services were surgery: skin and soft tissue (17003), office visit, established patient (99213) and surgery: skin and soft tissue (17000).
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Where did Dr. Ann Chang Brewer go to medical school?
Dr. Brewer graduated from University of Arizona College of Medicine in 2013.
What drugs does Dr. Ann Chang Brewer prescribe most?
In 2024 Medicare Part D data, Dr. Brewer's most prescribed drugs by claims were Fluorouracil, Ketoconazole and Hydrocortisone.
Has Dr. Ann Chang Brewer received payments from drug or device companies?
CMS Open Payments shows $8,706 in general payments to Dr. Brewer from 19 companies from 2017 to 2025. The largest total came from UCB, Inc.
How long has Dr. Ann Chang Brewer been practicing?
Dr. Brewer graduated from medical school in 2013, 13 years ago.
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