Dr. John Aaron, MD
- Medicare services, 2024
- 196
- Medicare patients, 2024
- 210
- Part D claims, 2018
- 11
- MIPS score, 2024
- 94
- Hospital affiliations
- 3
- Practice address
- 975 E 3rd St, Chattanooga, TN 37403
- Practice phone
- Call (423) 778-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Aaron's professional email, personal email and mobile number
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Dr. John Aaron is an internist in Chattanooga, Tennessee
Dr. Aaron practices at Erlanger Baroness Hospital in Chattanooga, Tennessee, part of Erlanger Health.
Dr. Aaron's NPI, 1629019922, was assigned on June 9, 2006. Dr. Aaron holds Tennessee license 42101.
- NPI
- 1629019922NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941269021
- NPI enumeration date
- June 9, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (423) 778-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Aaron practices at Erlanger Baroness Hospital in Chattanooga, Tennessee
Dr. Aaron's primary practice is Erlanger Baroness Hospital, at 975 E 3rd St, Chattanooga, TN 37403 in Hamilton County. The practice phone is (423) 778-7000.
- Erlanger Baroness Hospital975 E 3rd St, Chattanooga, TN 37403 · Hamilton CountyPhone(423) 778-7000
Source: Dmand AI Affiliation Data
Dr. John Aaron is affiliated with 4 sites of care and 3 medical groups
Dr. Aaron's primary practice is Erlanger Baroness Hospital in Chattanooga, Tennessee, part of Erlanger Health. Dr. Aaron is also affiliated with Parkridge Medical Center. The medical group on file is Erlanger. Dmand AI also links Dr. Aaron to 1 more hospital, 2 medical groups and 1 community health center, 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. John Aaron's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Aaron practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Erlanger Baroness Hospital | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Erlanger Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Aaron is one of 2,427 internists in Tennessee
Internal medicine is Dr. Aaron's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Aaron's licenses on file in 2 states: Tennessee and Mississippi.
Specialties and state licenses
- Internal medicine, TennesseePrimary
- Family medicine, Mississippi
Internists near Dr. Aaron
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. John Aaron billed Medicare for 196 services in 2024
CMS data shows 196 Medicare services from Dr. Aaron across 1 procedure code in 2024, for 210 Medicare patients. Medicare paid $24,999 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Aaron's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1282024: 19653%
Dr. Aaron compared with the Tennessee median for internists, 2024
- Dr. Aaron
- Tennessee median
- Medicare services
- 196vs 67171% below
- Medicare patients
- 210vs 2225% below
- Part D claims
- 11vs 33497% below
Medians across 2,462 internists in Tennessee with Dmand AI profiles that report each measure.
Dr. Aaron'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. Aaron and other internists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Aaron treated 210 Medicare patients in 2024, average age 74
CMS counts 210 Medicare patients who saw Dr. Aaron in 2024. The largest group is 75 to 84, with 82 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 2.30, 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. Aaron's median patient age at 66, with 54% women.
Dr. Aaron's Medicare patients by age, 2024
Dr. Aaron's Medicare patients by sex, 2024
- Women9746%
- Men11354%
Chronic conditions among Dr. Aaron's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis69%
- Mood disorders57%
- Anxiety55%
- Depression51%
- Chronic kidney disease44%
- Ischemic heart disease43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Aaron's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Aaron wrote 11 Medicare Part D claims in 2018
In 2018, Dr. Aaron wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $13,630 in total drug cost.
Dr. Aaron's most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. John Aaron 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. Aaron for performance year 2024, reported through an alternative payment model (APM). Dr. Aaron accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Aaron's 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. John Aaron received $387 in industry payments from 2016 to 2024
CMS Open Payments shows 16 general payments to Dr. Aaron from 6 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $308.
General payments to Dr. Aaron by program year, 2016 to 2024
Companies that paid Dr. Aaron the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Aaron'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) |
| 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. John Aaron
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. John Aaron's NPI number?
Dr. John Aaron's NPI number is 1629019922. It was assigned on June 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Aaron?
Dr. John Aaron is an internist in Chattanooga, Tennessee. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Aaron practice?
Dr. Aaron practices at 975 E 3rd St, Chattanooga, TN 37403. Dr. Aaron's primary practice is Erlanger Baroness Hospital in Chattanooga, Tennessee, part of Erlanger Health. Dmand AI also links Dr. Aaron to 1 hospital, 2 medical groups and 1 community health center.
What is Dr. John Aaron's office phone number?
The practice phone on file for Dr. Aaron is (423) 778-7000.
What is Dr. John Aaron's medical license number?
Dr. Aaron holds Tennessee license 42101, one of the licenses on file in 2 states.
Which states has Dr. John Aaron been licensed in?
Dmand AI has state licenses on file for Dr. Aaron in Tennessee and Mississippi.
Which hospitals is Dr. John Aaron affiliated with?
Dr. Aaron practices at Erlanger Baroness Hospital in Chattanooga, Tennessee. Dr. Aaron is also affiliated with Parkridge Medical Center. Dmand AI links Dr. Aaron to 1 more hospital.
What medical group is Dr. John Aaron part of?
Dr. Aaron is linked to Erlanger. Dmand AI links Dr. Aaron to 2 more medical groups.
Does Dr. John Aaron accept Medicare?
Yes. CMS data shows Dr. Aaron billed Medicare for 196 services in 2024, and Dr. Aaron accepts Medicare assignment.
What is Dr. John Aaron's MIPS score?
Dr. Aaron's MIPS final score for performance year 2024 is 94 out of 100, reported through an alternative payment model (APM).
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. John Aaron see?
CMS counts 210 Medicare patients who saw Dr. Aaron in 2024, with an average age of 74.
What services does Dr. John Aaron bill to Medicare?
In 2024, Dr. Aaron's most billed Medicare services were hospital inpatient care (99223).
What drugs does Dr. John Aaron prescribe most?
In 2018 Medicare Part D data, Dr. Aaron's most prescribed drugs by claims were Mycamine.
Has Dr. John Aaron received payments from drug or device companies?
CMS Open Payments shows $387 in general payments to Dr. Aaron from 6 companies from 2016 to 2024. The largest total came from Allergan Inc.
How long has Dr. John Aaron been practicing?
Dr. Aaron graduated from medical school in 1986, 40 years ago.
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