Provider Profile
Helen E. Callahan, CRNP
Unclaimed ProfileAbout Helen Callahan
Listed in the NPI registry as a nurse practitioner, Helen E. Callahan, CRNP practices in Tucson, AZ. Helen is also listed as specializing in registered nurse. According to Medicare claims data, the services billed most often include insertion of needle into vein for collection of blood sample.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (520) 396-1360
- Email not available
Practice Locations
4892 N STONE AVE STE 100 SUITE 504 THE CENTER FOR DIABETES & ENDOCRINE HEALTH
Tucson, AZ 85704
Procedures Most Often Billed to Medicare
16 services · 16 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
16 | Less often than most peers in Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other nurse practitioners in Tucson 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2004 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in AZ who bill this service to Medicare most often.
Common questions
What kind of doctor is Helen E. Callahan?
Helen E. Callahan is a nurse practitioner in Tucson, AZ. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Helen E. Callahan's address?
Helen E. Callahan is listed at 4892 N Stone Ave Ste 100 Suite 504 the Center for Diabetes & Endocrine Health, Tucson, AZ 85704. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Helen E. Callahan?
The number on file is (520) 396-1360. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Helen E. Callahan?
Helen E. Callahan's National Provider Identifier is 1215937883. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Helen E. Callahan train?
Helen E. Callahan attended Other, graduating in 2004. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Helen E. Callahan have?
Helen E. Callahan has 22 years experience. Calculated from a graduation year of 2004, reported in the CMS National Downloadable File.
CMS public data
What procedures does Helen E. Callahan perform?
According to Medicare billing data, Helen E. Callahan performs procedures including insertion of needle into vein for collection of blood sample. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Helen E. Callahan's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Helen E. Callahan. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.