Katherine Dawn Duncan, M.D.
Obesity Medicine (Internal Medicine) Physician · Phoenix, AZ
Katherine Dawn Duncan, M.D. is an obesity medicine (internal medicine) physician with a practice address in Phoenix, Arizona, and NPI 1366762650, issued on Jun 9, 2010. Check the license (Arizona 47650, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Katherine Dawn Duncan
- Credential
- M.D.
- Primary taxonomy
- Obesity Medicine (Internal Medicine) Physician 207RB0002X
- License number
- 47650 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 3811 E Bell RD Ste 300, Phoenix, AZ 85032
- Phone
- (480) 454-7350
- Enumerated
- Jun 9, 2010
- Record last updated
- Jun 4, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (602) 569-1035
- Entity
- Type 1 · individual
All 1 in Arizona → Look up another NPI →
Also registered at 3811 E Bell RD Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amy Wifler, PAPhysician Assistant1417770264
Verify Katherine Dawn Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 47650Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average obesity medicine (internal medicine) physician in 2024
65 Medicare Part D claims for 15 beneficiaries, against an average of 742 among the 106 providers of this specialty who prescribed in Part D. Brand-name drugs were 65% of claims.
Most prescribed
- Mounjaro20 claims
- Wegovy12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $92,479.20
158 payments; by number, the most common kind was compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program; the largest payer was Lilly USA, LLC. The 80 providers of this specialty with any payment received $6,310.67 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Obesity Medicine (Internal Medicine) Physician providers in Arizona
There are 1 obesity medicine (internal medicine) physician records in Arizona.
All 1 in Arizona → Every provider in Phoenix → Obesity Medicine (Internal Medicine) Physician nationwide →
Common questions
What is Katherine Dawn Duncan, M.D.'s NPI number?
Katherine Dawn Duncan, M.D.'s National Provider Identifier (NPI) is 1366762650, issued on Jun 9, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Dawn Duncan, M.D. located?
The NPPES record lists a practice address at 3811 E Bell RD Ste 300, Phoenix, AZ, 85032. Phone: (480) 454-7350. Providers update this record themselves, so call before visiting.
How can I verify Katherine Dawn Duncan, M.D.'s license?
NPPES lists Arizona license number 47650, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Dawn Duncan, M.D. prescribe under Medicare Part D?
In 2024, Katherine Dawn Duncan, M.D. had 65 Medicare Part D claims for 15 beneficiaries; the average among obesity medicine (internal medicine) physician prescribers was 742. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.