Dr. Ann Thomas, MD
- Medicare services, 2024
- 5,287
- Medicare patients, 2024
- 833
- Part D claims, 2024
- 1,464
- MIPS score, 2024
- 88
- Hospital affiliations
- 4
- Practice address
- 2149 E Warner Rd, Tempe, AZ 85284
- Practice phone
- Call (480) 391-2241
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Desert Mountain Dialysis Center
Tempe, Arizona
Find Dr. Thomas' 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. Ann Thomas is a nephrologist in Tempe, Arizona
Dr. Thomas practices at Desert Mountain Dialysis Center in Tempe, Arizona.
Dr. Thomas' NPI, 1821061607, was assigned on February 10, 2006. Dr. Thomas holds Arizona license 27537.
- NPI
- 1821061607NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183630098
- NPI enumeration date
- February 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (480) 391-2241
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ann Thomas practices at Desert Mountain Dialysis Center in Tempe, Arizona
Dr. Thomas' primary practice is Desert Mountain Dialysis Center, at 2149 E Warner Rd, Tempe, AZ 85284 in Maricopa County. The practice phone is (480) 391-2241.
- Desert Mountain Dialysis Center2149 E Warner Rd, Tempe, AZ 85284 · Maricopa CountyPhone(480) 391-2241
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ann Thomas is affiliated with 8 sites of care and 1 medical group
Dr. Thomas' primary practice is Desert Mountain Dialysis Center in Tempe, Arizona. Dr. Thomas is also affiliated with Mayo Clinic Hospital - Phoenix. The medical group on file is Arizona Kidney Disease & Hypertension Centers (AKDHC). Dmand AI also links Dr. Thomas to 3 more hospitals, 2 dialysis centers and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ann Thomas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomas practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Desert Mountain Dialysis Center | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ann Thomas is one of 268 nephrologists in Arizona
Nephrology is Dr. Thomas' primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Thomas is licensed in Arizona.
Specialties and state licenses
- Nephrology, ArizonaPrimary
Nephrologists near Dr. Thomas
Counts of nephrologists 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. Ann Thomas billed Medicare for 5,287 services in 2024
CMS data shows 5,287 Medicare services from Dr. Thomas across 11 procedure codes in 2024, for 833 Medicare patients. Medicare paid $282,698 for them.
Dr. Thomas' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 3,5102024: 2,88018%
- Office and hospital visits
- 2023: 2,1192024: 2,0931%
- Tests and treatments
- 2023: 6192024: 24660%
- Other services
- 2023: 112024: 68518%
Where Dr. Thomas' Medicare services took place, 2024
- In an office4,14878%
- In a facility1,13922%
Dr. Thomas compared with the Arizona median for nephrologists, 2024
- Dr. Thomas
- Arizona median
- Medicare services
- 5,287vs 1,4593.6 times
- Medicare patients
- 833vs 4012.1 times
- Part D claims
- 1,270vs 84051% above
Medians across 272 nephrologists in Arizona with Dmand AI profiles that report each measure.
Dr. Thomas' 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. Thomas and other nephrologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ann Thomas treated 833 Medicare patients in 2024, average age 78
CMS counts 833 Medicare patients who saw Dr. Thomas in 2024. The largest group is 75 to 84, with 405 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 5% are also on Medicaid. Their average risk score is 2.57, 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. Thomas' median patient age at 72, with 49% women.
Dr. Thomas' Medicare patients by age, 2024
Dr. Thomas' Medicare patients by sex, 2024
- Women41650%
- Men41750%
Chronic conditions among Dr. Thomas' Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Heart failure53%
- Ischemic heart disease51%
- Atrial fibrillation41%
- Diabetes39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Thomas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women49%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ann Thomas wrote 1,464 Medicare Part D claims in 2024
In 2024, Dr. Thomas wrote 1,464 Medicare Part D claims for 299 patients. 92% of them were for generic drugs. CMS names the drug for 1,270 of them, across 28 drugs with 11 or more claims each, at $96,495 in total drug cost. In 2023, CMS named 1,240 claims across 29 drugs.
Dr. Thomas' Part D claims by kind of drug, 2024
- Generic1,345 claims92%
- Brand-name and other119 claims8%
Dr. Thomas' 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. Thomas' Part D claims, 2024
- Antibiotics3%45 of 1,464 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,2402024: 1,2702%
Drugs named by CMS: 28 in 2024, 29 in 2023.
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. Ann Thomas scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Thomas for performance year 2024, reported as part of a group. Dr. Thomas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Thomas as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Thomas' MIPS scores, performance year 2024
- 88of 100Final score
- 67.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Ann Thomas received $6,283 in industry payments from 2016 to 2025
CMS Open Payments shows 324 general payments to Dr. Thomas from 44 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $671.
General payments to Dr. Thomas by program year, 2016 to 2025
General payments to Dr. Thomas by kind, 2016 to 2025
- Food and beverage$6,03096%
- Education$2534%
Companies that paid Dr. Thomas the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ann Thomas'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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. Ann Thomas
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. Ann Thomas' NPI number?
Dr. Ann Thomas' NPI number is 1821061607. It was assigned on February 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ann Thomas?
Dr. Ann Thomas is a nephrologist in Tempe, Arizona. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Ann Thomas practice?
Dr. Thomas practices at 2149 E Warner Rd, Tempe, AZ 85284. Dr. Thomas' primary practice is Desert Mountain Dialysis Center in Tempe, Arizona. Dmand AI also links Dr. Thomas to 3 hospitals, 2 dialysis centers and 1 group practice or clinic.
What is Dr. Ann Thomas' office phone number?
The practice phone on file for Dr. Thomas is (480) 391-2241.
What is Dr. Ann Thomas' medical license number?
Dr. Thomas holds Arizona license 27537.
Which hospitals is Dr. Ann Thomas affiliated with?
Dr. Thomas is affiliated with Mayo Clinic Hospital - Phoenix. Dmand AI links Dr. Thomas to 3 more hospitals.
What medical group is Dr. Ann Thomas part of?
Dr. Thomas is linked to Arizona Kidney Disease & Hypertension Centers (AKDHC).
Does Dr. Ann Thomas accept Medicare?
Yes. CMS data shows Dr. Thomas billed Medicare for 5,287 services in 2024, and Dr. Thomas accepts Medicare assignment.
Does Dr. Ann Thomas offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Thomas as offering telehealth services.
What is Dr. Ann Thomas' MIPS score?
Dr. Thomas' MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Ann Thomas see?
CMS counts 833 Medicare patients who saw Dr. Thomas in 2024, with an average age of 78.
What services does Dr. Ann Thomas bill to Medicare?
In 2024, Dr. Thomas' most billed Medicare services were injected or infused drug (J0885), hospital inpatient care (99233) and office visit, established patient (99214).
What drugs does Dr. Ann Thomas prescribe most?
In 2024 Medicare Part D data, Dr. Thomas' most prescribed drugs by claims were Allopurinol, Calcitriol and Furosemide.
Has Dr. Ann Thomas received payments from drug or device companies?
CMS Open Payments shows $6,283 in general payments to Dr. Thomas from 44 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Ann Thomas been practicing?
Dr. Thomas graduated from medical school in 1989, 37 years ago.
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