Katherine Anne Loewen, M.D.
Emergency Medicine Physician · Phoenix, AZ
Katherine Anne Loewen, M.D. is an emergency medicine physician with a practice address in Phoenix, Arizona, and NPI 1639353451, issued on Dec 28, 2007. Check the license (Arizona 37615, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Katherine Anne Loewen
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 37615 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 250 E Dunlap Ave, Phoenix, AZ 85020
- Phone
- (602) 870-6316
- Enumerated
- Dec 28, 2007
- Record last updated
- May 6, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Also registered at 250 E Dunlap Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Anne Loewen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 37615Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average emergency medicine physician in 2024
188 Medicare Part D claims for 126 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Cephalexin22 claims
- Oxycodone-Acetaminophen16 claims
- Ciprofloxacin Hcl15 claims
- Prednisone13 claims
- Sulfamethoxazole-Trimethoprim13 claims
- Amoxicillin-Clavulanate Potass12 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.
Katherine Anne Loewen among 1,494 emergency medicine physician records in Arizona
Katherine Anne Loewen, M.D. is one of 1,494 emergency medicine physician records with a practice address in Arizona. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 38% of them.
- NPI issued2007 · 38% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 55% of these records are
- Record last updated2014 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
394 emergency medicine physician records list a practice address in Phoenix
They are 394 of the 31,399 NPPES records with a practice address in Phoenix, and 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Phoenix → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Amy Axberg, M.D.Phoenix, AZ 850201508073925
- Derek Detemple, DOPhoenix, AZ 850201992788095
- Neal Faux, MDPhoenix, AZ 850201902832413
- Garth Gemar, M.D.Phoenix, AZ 850201295767457
- Charles Goldstein, MDPhoenix, AZ 850201386671089
- David Homer, DOPhoenix, AZ 850201225065436
- Caesar Ines, M.DPhoenix, AZ 850201407893027
- Jonathan Maitem, DOPhoenix, AZ 850201265456149
Common questions
What is Katherine Anne Loewen, M.D.'s NPI number?
Katherine Anne Loewen, M.D.'s National Provider Identifier (NPI) is 1639353451, issued on Dec 28, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Anne Loewen, M.D. located?
The NPPES record lists a practice address at 250 E Dunlap Ave, Phoenix, AZ, 85020. Phone: (602) 870-6316. Providers update this record themselves, so call before visiting.
How can I verify Katherine Anne Loewen, M.D.'s license?
NPPES lists Arizona license number 37615, 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 Anne Loewen, M.D. prescribe under Medicare Part D?
In 2024, Katherine Anne Loewen, M.D. had 188 Medicare Part D claims for 126 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.