Dr. John Terrill Main, DO
- Medicare services, 2024
- 512
- Medicare patients, 2024
- 192
- Part D claims, 2024
- 300
- MIPS score, 2024
- 100
- Hospital affiliations
- 2
- Practice address
- 1431 SW 1st Ave, Ocala, FL 34471
- Practice phone
- Call (352) 401-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Main'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. John Terrill Main is a neurosurgeon in Ocala, Florida
Dr. Main practices at HCA Florida Ocala Hospital in Ocala, Florida, part of HCA Healthcare.
Dr. Main's NPI, 1467405233, was assigned on May 19, 2006. Dr. Main graduated from Oklahoma State University College Of Osteopathic Medicine in 1998. Dr. Main holds Florida license OS14853.
- NPI
- 1467405233NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305825324
- NPI enumeration date
- May 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (352) 401-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Terrill Main practices at HCA Florida Ocala Hospital in Ocala, Florida
Dr. Main's primary practice is HCA Florida Ocala Hospital, at 1431 SW 1st Ave, Ocala, FL 34471 in Marion County. The practice phone is (352) 401-1000.
- HCA Florida Ocala Hospital1431 SW 1st Ave, Ocala, FL 34471 · Marion CountyPhone(352) 401-1000
Source: Dmand AI Affiliation Data
Dr. John Terrill Main is affiliated with 6 sites of care and 2 medical groups
Dr. Main's primary practice is HCA Florida Ocala Hospital in Ocala, Florida, part of HCA Healthcare. Dr. Main is also affiliated with UF Health Spanish Plaines Hospital. The medical group on file is CORA Physical Therapy, Spanish Springs. Dmand AI also links Dr. Main to 2 more group practices and clinics, 2 home health agencies and 1 medical group, 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 Terrill Main's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Main practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HCA Florida Ocala Hospital | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Terrill Main is one of 577 neurosurgeons in Florida
Neurological surgery is Dr. Main's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Main is board certified in neurological surgery by the AOA Board of Surgery. Dmand AI has Dr. Main's licenses on file in 2 states: Florida and Oklahoma.
Specialties and state licenses
- Neurological surgery, FloridaPrimary
- Oklahoma license
Clinical focus
Dmand AI lists back and neck pain treatment without fusion, craniotomy, lower back pain, neck pain and spine problems, spinal fusion and thoracic spine disorders among the conditions Dr. Main treats.
Neurosurgeons near Dr. Main
Counts of neurosurgeons 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 Terrill Main billed Medicare for 512 services in 2024
CMS data shows 512 Medicare services from Dr. Main across 16 procedure codes in 2024, for 192 Medicare patients. Medicare paid $178,014 for them.
Dr. Main's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2972024: 3249%
- Office and hospital visits
- 2023: 2062024: 1889%
Where Dr. Main's Medicare services took place, 2024
- In an office14629%
- In a facility36671%
Dr. Main compared with the Florida median for neurosurgeons, 2024
- Dr. Main
- Florida median
- Medicare services
- 512vs 2292.2 times
- Medicare patients
- 192vs 17013% above
- Part D claims
- 224vs 356.4 times
Medians across 503 neurosurgeons in Florida with Dmand AI profiles that report each measure.
Dr. Main'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. Main and other neurosurgeons in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Terrill Main treated 192 Medicare patients in 2024, average age 75
CMS counts 192 Medicare patients who saw Dr. Main in 2024. The largest group is 75 to 84, with 83 patients. 75% of them have arthritis, and 75% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Main's median patient age at 72, with 50% women.
Dr. Main's Medicare patients by age, 2024
Dr. Main's Medicare patients by sex, 2024
- Women9650%
- Men9650%
Chronic conditions among Dr. Main's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease45%
- Mood disorders34%
- Anxiety33%
- Chronic kidney disease33%
- Depression32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Main's 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
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Terrill Main wrote 300 Medicare Part D claims in 2024
In 2024, Dr. Main wrote 300 Medicare Part D claims for 153 patients. 99% of them were for generic drugs. CMS names the drug for 224 of them, across 7 drugs with 11 or more claims each, at $2,523 in total drug cost. In 2023, CMS named 110 claims across 5 drugs.
Dr. Main's Part D claims by kind of drug, 2024
- Generic297 claims99%
- Brand-name and other3 claims1%
Dr. Main'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. Main's Part D claims, 2024
- Opioids34%102 of 300 claims
- Antibiotics13%40 of 300 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: 1102024: 224104%
Drugs named by CMS: 7 in 2024, 5 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. John Terrill Main scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Main for performance year 2024, reported individually. Dr. Main accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 335 procedures of spinal fusion by Dr. Main, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Main's MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Main ranks in Medicare procedure volume
- Spinal fusion
- 97th percentile335 procedures
- Laminectomy or laminotomy (partial removal of spine bones)
- 94th percentile99 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
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. John Terrill Main received $2,783,416 in industry payments from 2016 to 2025
CMS Open Payments shows 57 general payments to Dr. Main from 24 drug and device companies from 2016 to 2025. Acquisitions make up the largest share, 68% of the total. Omnia Medical, LLC paid the most, $2,780,000.
General payments to Dr. Main by program year, 2016 to 2025
General payments to Dr. Main by kind, 2016 to 2025
- Acquisitions$1,890,00068%
- Royalties and licenses$890,00032%
- Food and beverage$3,4160%
Companies that paid Dr. Main the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Terrill Main graduated from Oklahoma State University College Of Osteopathic Medicine
Dr. Main graduated from Oklahoma State University College Of Osteopathic Medicine in 1998. Dr. Main is a member of AOA.
- Medical school
- Board certified in neurological surgery
- Board certified in 2017 - 2026
- Board certified in 1999 - 2002
- Board certified in 2004 - 2025
Source: Dmand AI Professional Profile Data
Dr. John Terrill Main accepts plans from 17 insurance carriers
Dr. Main is in network with 17 carriers, including Elevance, Aetna and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- HCSC
- Humana
- +9 more carriersWith a free account
Plan types Dr. Main accepts, by number of carriers
- PPO12
- Medicare11
- HMO10
- POS6
- EPO5
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Terrill Main'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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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 Terrill Main
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 Terrill Main's NPI number?
Dr. John Terrill Main's NPI number is 1467405233. It was assigned on May 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Terrill Main?
Dr. John Terrill Main is a neurosurgeon in Ocala, Florida. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. John Terrill Main practice?
Dr. Main practices at 1431 SW 1st Ave, Ocala, FL 34471. Dr. Main's primary practice is HCA Florida Ocala Hospital in Ocala, Florida, part of HCA Healthcare. Dmand AI also links Dr. Main to 2 group practices and clinics, 2 home health agencies and 1 medical group.
What is Dr. John Terrill Main's office phone number?
The practice phone on file for Dr. Main is (352) 401-1000.
What is Dr. John Terrill Main's medical license number?
Dr. Main holds Florida license OS14853, one of the licenses on file in 2 states.
Which states has Dr. John Terrill Main been licensed in?
Dmand AI has state licenses on file for Dr. Main in Florida and Oklahoma.
Which hospitals is Dr. John Terrill Main affiliated with?
Dr. Main practices at HCA Florida Ocala Hospital in Ocala, Florida. Dr. Main is also affiliated with UF Health Spanish Plaines Hospital.
What medical group is Dr. John Terrill Main part of?
Dr. Main is linked to CORA Physical Therapy, Spanish Springs. Dmand AI links Dr. Main to 1 more medical group.
Does Dr. John Terrill Main accept Medicare?
Yes. CMS data shows Dr. Main billed Medicare for 512 services in 2024, and Dr. Main accepts Medicare assignment.
What is Dr. John Terrill Main's MIPS score?
Dr. Main's MIPS final score for performance year 2024 is 100 out of 100, reported individually.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. John Terrill Main see?
CMS counts 192 Medicare patients who saw Dr. Main in 2024, with an average age of 75.
Is Dr. John Terrill Main board certified?
Yes. Dr. Main is board certified in neurological surgery by the AOA Board of Surgery.
What services does Dr. John Terrill Main bill to Medicare?
In 2024, Dr. Main's most billed Medicare services were office visit, new patient (99204), office visit, established patient (99214) and surgery: bones and joints (22853).
Where did Dr. John Terrill Main go to medical school?
Dr. Main graduated from Oklahoma State University College Of Osteopathic Medicine in 1998.
What drugs does Dr. John Terrill Main prescribe most?
In 2024 Medicare Part D data, Dr. Main's most prescribed drugs by claims were Methocarbamol, Oxycodone-Acetaminophen and Tramadol HCl.
Has Dr. John Terrill Main received payments from drug or device companies?
CMS Open Payments shows $2,783,416 in general payments to Dr. Main from 24 companies from 2016 to 2025. The largest total came from Omnia Medical, LLC.
How long has Dr. John Terrill Main been practicing?
Dr. Main graduated from medical school in 1998, 28 years ago.
What insurance does Dr. John Terrill Main accept?
Dr. Main is in network with 17 carriers, including Elevance, Aetna and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
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