Dr. Preston F. Ashby, DO
- Medicare services, 2024
- 803
- Medicare patients, 2024
- 295
- Part D claims, 2024
- 133
- MIPS score, 2024
- 89
- Hospital affiliations
- 6
- Practice address
- 1301 South Crismon Road, Mesa, AZ 85209
- Practice phone
- Call (480) 358-6100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ashby's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Preston F. Ashby is an internist in Mesa, Arizona
Dr. Ashby practices at HonorHealth Four Peaks Medical Center in Mesa, Arizona, part of HonorHealth.
Dr. Ashby's NPI, 1992183198, was assigned on May 8, 2015. Dr. Ashby holds Arizona license 007541.
- NPI
- 1992183198NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355698572
- NPI enumeration date
- May 8, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (480) 358-6100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Preston F. Ashby practices at HonorHealth Four Peaks Medical Center in Mesa, Arizona
Dr. Ashby's primary practice is HonorHealth Four Peaks Medical Center, at 1301 South Crismon Road, Mesa, AZ 85209 in Maricopa County. The practice phone is (480) 358-6100.
- HonorHealth Four Peaks Medical Center1301 South Crismon Road, Mesa, AZ 85209 · Maricopa CountyPhone(480) 358-6100
Source: Dmand AI Affiliation Data
Dr. Preston F. Ashby is affiliated with 11 sites of care and 3 medical groups
Dr. Ashby's primary practice is HonorHealth Four Peaks Medical Center in Mesa, Arizona, part of HonorHealth. Dr. Ashby is also affiliated with Banner Baywood Medical Center. The medical group on file is Pulmonary Consultants of Arizona. Dmand AI also links Dr. Ashby to 4 more hospitals, 5 home health agencies and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Preston F. Ashby's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ashby practices, 11 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HonorHealth Four Peaks Medical Center | Available with a free account |
| +10 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Preston F. Ashby is one of 2,420 internists in Arizona
Internal medicine is Dr. Ashby's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ashby is licensed in Arizona.
Specialties and state licenses
- Internal medicine, ArizonaPrimary
Internists near Dr. Ashby
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Preston F. Ashby billed Medicare for 803 services in 2024
CMS data shows 803 Medicare services from Dr. Ashby across 7 procedure codes in 2024, for 295 Medicare patients. Medicare paid $74,497 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Ashby compared with the Arizona median for internists, 2024
- Dr. Ashby
- Arizona median
- Medicare services
- 803vs 47669% above
- Medicare patients
- 295vs 20544% above
- Part D claims
- 25vs 26090% below
Medians across 2,300 internists in Arizona with Dmand AI profiles that report each measure.
Dr. Ashby's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ashby and other internists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Preston F. Ashby treated 295 Medicare patients in 2024, average age 76
CMS counts 295 Medicare patients who saw Dr. Ashby in 2024. The largest group is 75 to 84, with 114 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.06, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ashby's median patient age at 75, with 54% women.
Dr. Ashby's Medicare patients by age, 2024
Dr. Ashby's Medicare patients by sex, 2024
- Women16757%
- Men12843%
Chronic conditions among Dr. Ashby's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Ischemic heart disease49%
- Diabetes47%
- Chronic kidney disease43%
- Heart failure39%
- Atrial fibrillation37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ashby's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Preston F. Ashby wrote 133 Medicare Part D claims in 2024
In 2024, Dr. Ashby wrote 133 Medicare Part D claims for 64 patients. 86% of them were for generic drugs. CMS names the drug for 25 of them, across 2 drugs with 11 or more claims each, at $146 in total drug cost.
Dr. Ashby's Part D claims by kind of drug, 2024
- Generic114 claims86%
- Brand-name and other19 claims14%
Dr. Ashby's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ashby's Part D claims, 2024
- Antibiotics23%30 of 133 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Preston F. Ashby scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Ashby for performance year 2024, reported as part of a group. Dr. Ashby accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ashby as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Ashby's MIPS scores, performance year 2024
- 89of 100Final score
- 63.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 90of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Preston F. Ashby received $95 in industry payments from 2024 to 2025
CMS Open Payments shows 5 general payments to Dr. Ashby from 3 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $35.
General payments to Dr. Ashby by program year, 2024 to 2025
Companies that paid Dr. Ashby the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Preston F. Ashby's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Preston F. Ashby
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Preston F. Ashby's NPI number?
Dr. Preston F. Ashby's NPI number is 1992183198. It was assigned on May 8, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Preston F. Ashby?
Dr. Preston F. Ashby is an internist in Mesa, Arizona. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Preston F. Ashby practice?
Dr. Ashby practices at 1301 South Crismon Road, Mesa, AZ 85209. Dr. Ashby's primary practice is HonorHealth Four Peaks Medical Center in Mesa, Arizona, part of HonorHealth. Dmand AI also links Dr. Ashby to 4 hospitals, 5 home health agencies and 2 medical groups.
What is Dr. Preston F. Ashby's office phone number?
The practice phone on file for Dr. Ashby is (480) 358-6100.
What is Dr. Preston F. Ashby's medical license number?
Dr. Ashby holds Arizona license 007541.
Which hospitals is Dr. Preston F. Ashby affiliated with?
Dr. Ashby practices at HonorHealth Four Peaks Medical Center in Mesa, Arizona. Dr. Ashby is also affiliated with Banner Baywood Medical Center. Dmand AI links Dr. Ashby to 4 more hospitals.
What medical group is Dr. Preston F. Ashby part of?
Dr. Ashby is linked to Pulmonary Consultants of Arizona. Dmand AI links Dr. Ashby to 2 more medical groups.
Does Dr. Preston F. Ashby accept Medicare?
Yes. CMS data shows Dr. Ashby billed Medicare for 803 services in 2024, and Dr. Ashby accepts Medicare assignment.
Does Dr. Preston F. Ashby offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ashby as offering telehealth services.
What is Dr. Preston F. Ashby's MIPS score?
Dr. Ashby's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Preston F. Ashby see?
CMS counts 295 Medicare patients who saw Dr. Ashby in 2024, with an average age of 76.
What services does Dr. Preston F. Ashby bill to Medicare?
In 2024, Dr. Ashby's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).
What drugs does Dr. Preston F. Ashby prescribe most?
In 2024 Medicare Part D data, Dr. Ashby's most prescribed drugs by claims were Atorvastatin Calcium and Clopidogrel.
Has Dr. Preston F. Ashby received payments from drug or device companies?
CMS Open Payments shows $95 in general payments to Dr. Ashby from 3 companies from 2024 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Preston F. Ashby been practicing?
Dr. Ashby graduated from medical school in 2015, 11 years ago.
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