Helen E. Callahan, CRNP
Nurse Practitioner · Tucson, AZ
Helen E. Callahan, CRNP is a nurse practitioner with a practice address in Tucson, Arizona, and NPI 1215937883, issued on Jul 26, 2005. Check the license (Arizona AP3324, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Helen E. Callahan
- Credential
- CRNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- AP3324 AZ
SP008353 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4892 N Stone Ave Ste 100, Tucson, AZ 85704
- Phone
- (520) 396-1360
- Enumerated
- Jul 26, 2005
- Record last updated
- Oct 25, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (520) 795-9043
- Medicare enrollment
- Enrolled (PECOS I20100521000385); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 4892 N Stone Ave Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kerina Mariana, FNP-CFamily Nurse Practitioner1578294559
- Amy Matchett, DNP-FNPNurse Practitioner1225637184
- Rachel Sliger, LACCounselor1508660366
- Loan Whitmore, NPFamily Nurse Practitioner1033561519
Verify Helen E. Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license AP3324Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% more Medicare Part D claims than the average nurse practitioner in 2024
2,135 Medicare Part D claims for 830 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Atorvastatin Calcium129 claims
- Levothyroxine Sodium115 claims
- Amlodipine Besylate110 claims
- Lisinopril93 claims
- Metformin Hcl85 claims
- Omeprazole63 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
- Tucson Physician Group Holdings LLCTucson, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nurse Practitioner providers in Arizona
There are 1,423 nurse practitioner records in Arizona.
Other nurse practitioner records in Arizona
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- Belinda Acosta, FNPTucson, AZ1386622660
- Caitlin Adamowicz, NPScottsdale, AZ1104583152
- Jamie AdamsFort Defiance, AZ1144007097
- Kalekia Adams, DNPScottsdale, AZ1619555034
- Rachael Adger, NPTucson, AZ1306806443
- Jacqueline Agenbroad, NPPhoenix, AZ1447222328
Common questions
What is Helen E. Callahan, CRNP's NPI number?
Helen E. Callahan, CRNP's National Provider Identifier (NPI) is 1215937883, issued on Jul 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Helen E. Callahan, CRNP located?
The NPPES record lists a practice address at 4892 N Stone Ave Ste 100, Tucson, AZ, 85704. Phone: (520) 396-1360. Providers update this record themselves, so call before visiting.
How can I verify Helen E. Callahan, CRNP's license?
NPPES lists Arizona license number AP3324, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Helen E. Callahan, CRNP prescribe under Medicare Part D?
In 2024, Helen E. Callahan, CRNP had 2,135 Medicare Part D claims for 830 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.