Debra Shannon Witthar, BSN, MSN, DNP
Gerontology Nurse Practitioner · Sun City, AZ
Debra Shannon Witthar, BSN, MSN, DNP is a gerontology nurse practitioner with a practice address in Sun City, Arizona, and NPI 1760090427, issued on Jul 20, 2020. Check the license (Arizona 243265, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Debra Shannon Witthar
- Credential
- BSN, MSN, DNP
- Primary taxonomy
- Gerontology Nurse Practitioner 363LG0600X
- License number
- 243265 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 10515 W Santa FE Dr Bldg B, Sun City, AZ 85351
- Phone
- (623) 832-6530
- Enumerated
- Jul 20, 2020
- Record last updated
- Jul 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest gerontology nurse practitioner records → All 156 in Arizona → Look up another NPI →
Also registered at 10515 W Santa FE Dr Bldg B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Shprecher, D.O.Neurology Physician1679692594
- Dayra Valentino, FNP-CFamily Nurse Practitioner1063292365
Verify Debra Shannon Witthar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 243265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average gerontology nurse practitioner in 2024
161 Medicare Part D claims for 77 beneficiaries, against an average of 1,369 among the 6,165 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Carbidopa-Levodopa31 claims
- Nuplazid15 claims
- Rytary12 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 practice group's MIPS final score for 2023 (Medicare payment program): 98.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,620.72
10 payments; by number, the most common kind was travel and lodging; the largest payer was Abbott Laboratories. The 3,903 providers of this specialty with any payment received $742.05 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.
Debra Shannon Witthar among 156 gerontology nurse practitioner records in Arizona
Debra Shannon Witthar, BSN, MSN, DNP is one of 156 gerontology nurse practitioner records with a practice address in Arizona. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 58% of them.
- NPI issued2020 · 58% of these records are older, 35% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2020 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LG0600X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gerontology Nurse Practitioner providers in Arizona
There are 156 gerontology nurse practitioner records in Arizona.
All 156 in Arizona → Every provider in Sun City → Gerontology Nurse Practitioner nationwide →
The 8 gerontology nurse practitioner records with the nearest ZIP codes
- Stephanie De SantiagoSun City, AZ 853511497303028
- Sinclaire SantosSun City, AZ 853511154158186
- Nicole Humphrey, NPLitchfield Park, AZ 853401932611522
- Efoui Abotsi-Kowu, NPYuma, AZ 853641609431220
- Maria Theresa Magat, AGPCNP-BCGoodyear, AZ 853381083350615
- Annalisa McBride, AGNP-CYuma, AZ 853641245037084
- Bosede Ogidan-Obadina, APRNYuma, AZ 853641356833784
- Waheed Olabode, NPGoodyear, AZ 853381184197691
Common questions
What is Debra Shannon Witthar, BSN, MSN, DNP's NPI number?
Debra Shannon Witthar, BSN, MSN, DNP's National Provider Identifier (NPI) is 1760090427, issued on Jul 20, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Debra Shannon Witthar, BSN, MSN, DNP located?
The NPPES record lists a practice address at 10515 W Santa FE Dr Bldg B, Sun City, AZ, 85351. Phone: (623) 832-6530. Providers update this record themselves, so call before visiting.
How can I verify Debra Shannon Witthar, BSN, MSN, DNP's license?
NPPES lists Arizona license number 243265, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Debra Shannon Witthar, BSN, MSN, DNP prescribe under Medicare Part D?
In 2024, Debra Shannon Witthar, BSN, MSN, DNP had 161 Medicare Part D claims for 77 beneficiaries; the average among gerontology nurse practitioner prescribers was 1,369. Part D covers Medicare prescriptions only.
What is Debra Shannon Witthar, BSN, MSN, DNP's MIPS final score?
The 2023 MIPS final score is 98.3 of 100, reported for the practice group. 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.