Nathan Thomas Walton, MD
Internal Medicine Physician · Tucson, AZ
Nathan Thomas Walton, MD is an internal medicine physician with a practice address in Tucson, Arizona, and NPI 1992498588, issued on May 30, 2023. Check the license (Arizona R80259, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Nathan Thomas Walton
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R80259 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 7901 E 22ND St, Tucson, AZ 85710
- Phone
- (520) 694-8888
- Enumerated
- May 30, 2023
- Record last updated
- Sep 6, 2023
- Fax
- (520) 694-8466
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 7901 E 22ND St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Nathan Thomas Walton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license R80259Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average internal medicine physician in 2024
655 Medicare Part D claims for 121 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Atorvastatin Calcium42 claims
- Metformin Hcl34 claims
- Levothyroxine Sodium29 claims
- Amlodipine Besylate27 claims
- Losartan Potassium25 claims
- Rosuvastatin Calcium25 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.
Nathan Thomas Walton among 2,853 internal medicine physician records in Arizona
Nathan Thomas Walton, MD is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 91% of them.
- NPI issued2023 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2023 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
651 internal medicine physician records list a practice address in Tucson
They are 651 of the 18,788 NPPES records with a practice address in Tucson, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Tucson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Peter Amene, MDTucson, AZ 857101902841158
- Michael Birgel, MDTucson, AZ 857101619935939
- Joy Bulger BeckTucson, AZ 857101801039177
- Jae Choi, M.D.Tucson, AZ 857101689660672
- Miki Crane, MDTucson, AZ 857101326037094
- Leonard Fieber, MDTucson, AZ 857101083653596
- Jennifer Flynn, MDTucson, AZ 857101386618957
- Berneet Grewal, M.D.Tucson, AZ 857101770802159
Common questions
What is Nathan Thomas Walton, MD's NPI number?
Nathan Thomas Walton, MD's National Provider Identifier (NPI) is 1992498588, issued on May 30, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Thomas Walton, MD located?
The NPPES record lists a practice address at 7901 E 22ND St, Tucson, AZ, 85710. Phone: (520) 694-8888. Providers update this record themselves, so call before visiting.
How can I verify Nathan Thomas Walton, MD's license?
NPPES lists Arizona license number R80259, 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 Nathan Thomas Walton, MD prescribe under Medicare Part D?
In 2024, Nathan Thomas Walton, MD had 655 Medicare Part D claims for 121 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.