Preston F. Ashby, DO
Internal Medicine Physician · Chandler, AZ
Preston F. Ashby, DO is an internal medicine physician with a practice address in Chandler, Arizona, and NPI 1992183198, issued on May 8, 2015. Check the license (Arizona 007541, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Preston F. Ashby
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 007541 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1955 W Frye RD, Chandler, AZ 85224
- Phone
- (480) 728-7161
- Enumerated
- May 8, 2015
- Record last updated
- Dec 16, 2025
- Medicaid ID
- 397833 AZ
- Medicare enrollment
- Enrolled (PECOS I20180719001123); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 1955 W Frye RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Preston F. Ashby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 007541Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
133 Medicare Part D claims for 64 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium14 claims
- Clopidogrel11 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.
Industry payments in 2024: $25.03
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 2 group practices
- Mulberry Medical LLCTempe, AZ
- Pulmonary Consultants P.C.Mesa, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Preston F. Ashby among 2,853 internal medicine physician records in Arizona
Preston F. Ashby, DO 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 2015, is newer than 70% of them.
- NPI issued2015 · 70% of these records are older, 27% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2015 · median 2003 among the 1,643 with a school on file
- Record last updated2025 · 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).
93 internal medicine physician records list a practice address in Chandler
They are 93 of the 5,497 NPPES records with a practice address in Chandler, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Chandler → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ammar Alsheikh, M.D.Chandler, AZ 852241083609515
- Rudolph Cane, MDChandler, AZ 852241700865144
- Susan Carter, M.D.Chandler, AZ 852241922060433
- Melanie Cloonan Schulte, MDChandler, AZ 852241376521914
- Ralph D'Silva, M.D.Chandler, AZ 852241871594259
- Ravi Gupta, MDChandler, AZ 852241790751949
- Amita Gupta, MDChandler, AZ 852241962462630
- James Lieber, MDChandler, AZ 852241083690283
Common questions
What is Preston F. Ashby, DO's NPI number?
Preston F. Ashby, DO's National Provider Identifier (NPI) is 1992183198, issued on May 8, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Preston F. Ashby, DO located?
The NPPES record lists a practice address at 1955 W Frye RD, Chandler, AZ, 85224. Phone: (480) 728-7161. Providers update this record themselves, so call before visiting.
How can I verify Preston F. Ashby, DO's license?
NPPES lists Arizona license number 007541, 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 Preston F. Ashby, DO prescribe under Medicare Part D?
In 2024, Preston F. Ashby, DO had 133 Medicare Part D claims for 64 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.