Dr. Zachary R. Mills, MD
- Medicare services, 2024
- 50
- Medicare patients, 2024
- 66
- Part D claims, 2024
- 59
- MIPS score, 2024
- 94
- Hospital affiliations
- 1
- Practice address
- 979 E 3rd St, Chattanooga, TN 37403
- Practice phone
- Call (423) 757-0860
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Surgical Associates
Chattanooga, Tennessee
Find Dr. Mills' professional email, personal email and mobile number
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Dr. Zachary R. Mills is an epilepsy physician in Chattanooga, Tennessee
Dr. Mills practices at University Surgical Associates in Chattanooga, Tennessee.
Dr. Mills' NPI, 1639632854, was assigned on April 14, 2019. Dr. Mills holds Tennessee license 70839.
- NPI
- 1639632854NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052644135
- NPI enumeration date
- April 14, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (423) 757-0860
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Zachary R. Mills practices at University Surgical Associates in Chattanooga, Tennessee
Dr. Mills' primary practice is University Surgical Associates, at 979 E 3rd St, Chattanooga, TN 37403 in Hamilton County. The practice phone is (423) 757-0860.
- University Surgical Associates979 E 3rd St, Chattanooga, TN 37403 · Hamilton CountyPhone(423) 757-0860
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Zachary R. Mills is affiliated with 3 sites of care and 1 medical group
Dr. Mills' primary practice is University Surgical Associates in Chattanooga, Tennessee. Dr. Mills is also affiliated with Erlanger Baroness Hospital. The medical group on file is Erlanger. Dmand AI also links Dr. Mills to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Zachary R. Mills' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mills practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Surgical Associates | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Zachary R. Mills is one of 9 epilepsy physicians in Tennessee
Epilepsy is Dr. Mills' primary specialty in the NPI Registry, under taxonomy code 2084E0001X. Dr. Mills is licensed in Tennessee.
Specialties and state licenses
- Epilepsy, TennesseePrimary
Epilepsy physicians near Dr. Mills
Counts of epilepsy physicians 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. Zachary R. Mills billed Medicare for 50 services in 2024
CMS data shows 50 Medicare services from Dr. Mills across 3 procedure codes in 2024, for 66 Medicare patients. Medicare paid $3,049 for them.
Dr. Mills' Medicare services by type, 2024
- Tests and treatments39
- Office and hospital visits11
Where Dr. Mills' Medicare services took place, 2024
- In an office1122%
- In a facility3978%
Dr. Mills' 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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Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Zachary R. Mills treated 66 Medicare patients in 2024, average age 71
CMS counts 66 Medicare patients who saw Dr. Mills in 2024. The largest group is 65 to 74, with 27 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 30% are also on Medicaid. Their average risk score is 2.34, 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. Mills' median patient age at 53, with 56% women.
Dr. Mills' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mills' Medicare patients by sex, 2024
- Women3553%
- Men3147%
Chronic conditions among Dr. Mills' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Stroke or TIA58%
- Arthritis55%
- Diabetes52%
- Mood disorders50%
- Chronic kidney disease47%
- Ischemic heart disease42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mills' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Zachary R. Mills wrote 59 Medicare Part D claims in 2024
In 2024, Dr. Mills wrote 59 Medicare Part D claims for 28 patients. 78% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $609 in total drug cost.
Dr. Mills' Part D claims by kind of drug, 2024
- Generic46 claims78%
- Brand-name and other13 claims22%
Dr. Mills' 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.
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. Zachary R. Mills scored 94 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Dr. Mills for performance year 2024, reported through an alternative payment model (APM). Dr. Mills accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mills' MIPS scores, performance year 2024
- 94of 100Final score
- 80.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
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. Zachary R. Mills received $1,557 in industry payments from 2022 to 2025
CMS Open Payments shows 15 general payments to Dr. Mills from 8 drug and device companies from 2022 to 2025. Education make up the largest share, 77% of the total. Summit Surgical Corp. paid the most, $1,200.
General payments to Dr. Mills by program year, 2022 to 2025
General payments to Dr. Mills by kind, 2022 to 2025
- Education$1,20077%
- Food and beverage$35723%
Companies that paid Dr. Mills the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Zachary R. Mills's profile data
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Zachary R. Mills
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What is Dr. Zachary R. Mills' NPI number?
Dr. Zachary R. Mills' NPI number is 1639632854. It was assigned on April 14, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Zachary R. Mills?
Dr. Zachary R. Mills is an epilepsy physician in Chattanooga, Tennessee. The primary specialty in the NPI Registry is Epilepsy Physician (taxonomy code 2084E0001X).
Where does Dr. Zachary R. Mills practice?
Dr. Mills practices at 979 E 3rd St, Chattanooga, TN 37403. Dr. Mills' primary practice is University Surgical Associates in Chattanooga, Tennessee. Dmand AI also links Dr. Mills to 1 group practice or clinic.
What is Dr. Zachary R. Mills' office phone number?
The practice phone on file for Dr. Mills is (423) 757-0860.
What is Dr. Zachary R. Mills' medical license number?
Dr. Mills holds Tennessee license 70839.
Which hospitals is Dr. Zachary R. Mills affiliated with?
Dr. Mills is affiliated with Erlanger Baroness Hospital.
What medical group is Dr. Zachary R. Mills part of?
Dr. Mills is linked to Erlanger.
Does Dr. Zachary R. Mills accept Medicare?
Yes. CMS data shows Dr. Mills billed Medicare for 50 services in 2024, and Dr. Mills accepts Medicare assignment.
What is Dr. Zachary R. Mills' MIPS score?
Dr. Mills' MIPS final score for performance year 2024 is 94 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Zachary R. Mills see?
CMS counts 66 Medicare patients who saw Dr. Mills in 2024, with an average age of 71.
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What services does Dr. Zachary R. Mills bill to Medicare?
In 2024, Dr. Mills' most billed Medicare services were nerve and brain test (95816), nerve and brain test (95819) and office visit, established patient (99215).
What drugs does Dr. Zachary R. Mills prescribe most?
In 2024 Medicare Part D data, Dr. Mills' most prescribed drugs by claims were Levetiracetam.
Has Dr. Zachary R. Mills received payments from drug or device companies?
CMS Open Payments shows $1,557 in general payments to Dr. Mills from 8 companies from 2022 to 2025. The largest total came from Summit Surgical Corp.
How long has Dr. Zachary R. Mills been practicing?
Dr. Mills graduated from medical school in 2019, 7 years ago.
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