Heather Ruth Cassell, MD
Allergy & Immunology Physician · Tucson, AZ
Heather Ruth Cassell, MD is an allergy & immunology physician with a practice address in Tucson, Arizona, and NPI 1093700684, issued on Sep 20, 2005. Check the license (Arizona 30265, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Heather Ruth Cassell
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 30265 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 2902 East Grant Road, Tucson, AZ 85716
- Phone
- (520) 322-8361
- Enumerated
- Sep 20, 2005
- Record last updated
- Oct 29, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (520) 322-8462
- Medicaid ID
- 431374 AZ
- Medicare enrollment
- Enrolled (PECOS I20090821000192); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 1999
- Entity
- Type 1 · individual
Verify Heather Ruth Cassell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 30265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
76% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
178 Medicare Part D claims for 22 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Montelukast Sodium24 claims
- Symbicort23 claims
- Azithromycin12 claims
- Ipratropium Bromide12 claims
- Albuterol Sulfate Hfa11 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.
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $83.39
1 payment: food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 2,496 providers of this specialty with any payment received $8,321.81 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.
Bills Medicare through one group practice
- Banner-University Medical GroupTucson, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allergy & Immunology Physician providers in Arizona
There are 88 allergy & immunology physician records in Arizona.
Other allergy & immunology physician records in Arizona
- Housam Alasaly, M.D.Phoenix, AZ1679541957
- Miriam Anand, M.D.Tempe, AZ1407824790
- Natarajan Asokan, M.D.Kingman, AZ1649248725
- Martin Bartels, MDTucson, AZ1417949710
- Cindy Bauer, M.D.Phoenix, AZ1639367964
- Joseph Baxter, DOLuke Afb, AZ1225274368
- Kevin Boesel, MDPeoria, AZ1154312858
- Tara Carr, M.D.Tucson, AZ1669634853
- Ryan Casper, MDPeoria, AZ1306898846
- Eiza Ching, MDPeoria, AZ1740236298
Common questions
What is Heather Ruth Cassell, MD's NPI number?
Heather Ruth Cassell, MD's National Provider Identifier (NPI) is 1093700684, issued on Sep 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Heather Ruth Cassell, MD located?
The NPPES record lists a practice address at 2902 East Grant Road, Tucson, AZ, 85716. Phone: (520) 322-8361. Providers update this record themselves, so call before visiting.
How can I verify Heather Ruth Cassell, MD's license?
NPPES lists Arizona license number 30265, 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 Heather Ruth Cassell, MD prescribe under Medicare Part D?
In 2024, Heather Ruth Cassell, MD had 178 Medicare Part D claims for 22 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Heather Ruth Cassell, MD's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.