Karl Matthew Stempel, FNP
Family Nurse Practitioner · Tucson, AZ
Karl Matthew Stempel, FNP is a family nurse practitioner with a practice address in Tucson, Arizona, and NPI 1861419566, issued on Jul 17, 2006. Check the license (Arizona AP2226, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karl Matthew Stempel
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- AP2226 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 4685 E Grant RD, Tucson, AZ 85712
- Phone
- (855) 925-4733
- Enumerated
- Jul 17, 2006
- Record last updated
- Mar 30, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicaid ID
- 964917 AZ
- Medicare enrollment
- Enrolled (PECOS I20051006001030); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 5,933 in Arizona → Look up another NPI →
Also registered at 4685 E Grant RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Curtis BerryPharmacist1396990651
- Kristian Bunyi, RPHPharmacist1952631160
- Scott Cheatle, RPHPharmacist1548590755
- Gerald KooriPharmacist1831420330
- Kathleen Kulesa, DNP, FNP-CFamily Nurse Practitioner1275934432
Verify Karl Matthew Stempel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license AP2226Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average family nurse practitioner in 2024
642 Medicare Part D claims for 385 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Doxycycline Monohydrate90 claims
- Prednisone80 claims
- Cephalexin66 claims
- Amoxicillin-Clavulanate Potass54 claims
- Albuterol Sulfate Hfa38 claims
- Cefdinir28 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.
Bills Medicare through one group practice
- Nextcare Arizona I JV LLCGreen Valley, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karl Matthew Stempel among 5,933 family nurse practitioner records in Arizona
Karl Matthew Stempel, FNP is one of 5,933 family nurse practitioner records with a practice address in Arizona. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 91% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2005 · median 2019 among the 3,510 with a school on file
- Record last updated2018 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
907 family nurse practitioner records list a practice address in Tucson
They are 907 of the 18,788 NPPES records with a practice address in Tucson, and 5,933 family nurse practitioner records in Arizona.
All 5,933 in Arizona → Every provider in Tucson → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Bridget Doherty, NPTucson, AZ 857121952382715
- Elyse Hammett, FNPTucson, AZ 857121831103159
- Marguerite Havlis, FNPTucson, AZ 857121568497055
- Kathryn Kennel, NPTucson, AZ 857121144252164
- Suzanne Macdonald, NPTucson, AZ 857121588612402
- Kathleen McLeod, FNP-BCTucson, AZ 857121720054992
- Laurie McManus, FNPTucson, AZ 857121548246614
- Cynthia Mick, FNPTucson, AZ 857121043240591
Common questions
What is Karl Matthew Stempel, FNP's NPI number?
Karl Matthew Stempel, FNP's National Provider Identifier (NPI) is 1861419566, issued on Jul 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karl Matthew Stempel, FNP located?
The NPPES record lists a practice address at 4685 E Grant RD, Tucson, AZ, 85712. Phone: (855) 925-4733. Providers update this record themselves, so call before visiting.
How can I verify Karl Matthew Stempel, FNP's license?
NPPES lists Arizona license number AP2226, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Karl Matthew Stempel, FNP prescribe under Medicare Part D?
In 2024, Karl Matthew Stempel, FNP had 642 Medicare Part D claims for 385 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.