Dr. John Terrill Main , DO
Neurological Surgery • Ocala, FL
1725 Se 28th Loop Ste 102
Ocala, FL 344715328
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. John Main is listed in NPPES under Neurological Surgery.
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NPI assigned on May 19, 2006; this date does not establish years in practice.
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Published CMS data list 512 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99204 — New patient outpatient office visit: 76 service units.
- 99214 — Established patient outpatient office visit: 59 service units.
- 22853 — Insertion of cage or mesh device to spine bone and disc space during spine fusion: 57 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 16 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 224 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Methocarbamol — 53 prescription fills, including refills.
- Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) — 51 prescription fills, including refills.
- Tramadol Hcl — 33 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 7 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 70% of clinicians listed under Neurological Surgery in Florida (2024, 375 clinicians with data). Median for this group: 299. Middle half: 142 to 585.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 445 in 2020 to 512 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
1725 Se 28th Loop Ste 102
Ocala, FL 344715328
CMS Doctors and Clinicians lists 2 distinct group names: Cora Health Services Inc; Ocala Health Surgical Group Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1998
What Public CMS Data Show
Neurological Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
192 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $221,033 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $178,014 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
227 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$2,523 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $530,788.71 across 8 records.
By nature of payment
- Royalty or License: $530,000.00 across 1 record.
- Food and Beverage: $788.71 across 7 records.
Reporting-company totals (3 largest of 4)
- Omnia Medical, LLC: $530,000.00 across 1 record.
- Spinal Elements, Inc.: $344.78 across 2 records.
- Orthofix Medical, Inc.: $272.64 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
28 years (graduated 1998)
CMS Doctors and Clinicians data list 1998 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Main has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Main as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Ocala and Florida
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 70% of clinicians listed under Neurological Surgery in Florida (2024, 375 clinicians with data). Median for this group: 299. Middle half: 142 to 585.
Too few clinicians listed under Neurological Surgery in Ocala have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under Neurological Surgery in Florida (2024, 375 clinicians with data). Median for this group: $54,127. Middle half: $18,036 to $131,519.
Too few clinicians listed under Neurological Surgery in Ocala have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under Neurological Surgery in Florida (2024, 375 clinicians with data). Median for this group: $41,760. Middle half: $13,993 to $102,734.
Too few clinicians listed under Neurological Surgery in Ocala have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 75% of clinicians listed under Neurological Surgery in Florida (2024, 234 clinicians with data). Median for this group: 76. Middle half: 29 to 223.
Too few clinicians listed under Neurological Surgery in Ocala have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 75% of clinicians listed under Neurological Surgery in Florida (2024, 234 clinicians with data). Median for this group: $763. Middle half: $253 to $2,389.
Too few clinicians listed under Neurological Surgery in Ocala have Medicare Part D data for 2024 to compare.
15 active clinicians are listed under Neurological Surgery with a practice address in Ocala, FL (645 in Florida).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Ocala
13.3% of these 15 clinicians have the CMS telehealth indicator.
66.7% of these 15 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 15% from 445 in 2020 to 512 in 2024.
- 2020: 445
- 2021: 464
- 2022: 358
- 2023: 503
- 2024: 512
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Medicare-allowed amount
Medicare-allowed amount increased 13% from $195,942 in 2020 to $221,033 in 2024.
- 2020: $195,942
- 2021: $178,928
- 2022: $140,695
- 2023: $212,788
- 2024: $221,033
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Paid by Medicare
Paid by Medicare increased 13% from $157,075 in 2020 to $178,014 in 2024.
- 2020: $157,075
- 2021: $143,339
- 2022: $111,747
- 2023: $170,013
- 2024: $178,014
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 54% from 145 in 2020 to 224 in 2024.
- 2020: 145
- 2021: 193
- 2022: 124
- 2023: 110
- 2024: 224
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30-day fills
30-day fills increased 56% from 145 in 2020 to 227 in 2024.
- 2020: 145
- 2021: 199
- 2022: 125
- 2023: 112
- 2024: 227
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Part D drug cost
Part D drug cost went from $993 in 2020 to $2,523 in 2024.
- 2020: $993
- 2021: $1,746
- 2022: $923
- 2023: $1,059
- 2024: $2,523
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 17% from $636,174.39 in 2021 to $530,788.71 in 2025.
- 2021: $636,174.39
- 2022: $636,381.16
- 2023: $618,278.97
- 2024: $360,649.15
- 2025: $530,788.71
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $530,788.71.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Omnia Medical, LLC |
Royalty or License
Cash or cash equivalent
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— | General | $530,000.00 |
| Spinal Elements, Inc. |
Food and Beverage
Cash or cash equivalent
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Medical Device | General | $174.56 |
| Spinal Elements, Inc. |
Food and Beverage
Cash or cash equivalent
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Medical Device | General | $170.22 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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MAZOR X SYSTEM | General | $158.11 |
| Orthofix Medical, Inc. |
Food and Beverage
Cash or cash equivalent
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Spinal-Stim | General | $129.86 |
| Orthofix Medical, Inc. |
Food and Beverage
Cash or cash equivalent
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NorthStar | General | $86.93 |
| Orthofix Medical, Inc. |
Food and Beverage
Cash or cash equivalent
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Explorer TO | General | $55.85 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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MAZOR X SYSTEM | General | $13.18 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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76 | 76 | $366.29 | $169.61 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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59 | 53 | $242.32 | $130.42 |
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22853
Insertion of cage or mesh device to spine bone and disc space during spine fusion
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57 | 41 | $1004.00 | $281.40 |
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22614
Fusion of additional segment of spine
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52 | 17 | $1554.33 | $422.13 |
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63048
Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment
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42 | 12 | $852.52 | $230.01 |
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63052
Partial removal of bone of single segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back
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37 | 36 | $889.95 | $282.49 |
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22633
Fusion of spine in lower back with partial removal of spine bone and disc
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32 | 31 | $6884.00 | $1849.72 |
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22842
Placement of stabilizing device to back, 3-6 spine bone segments
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30 | 29 | $2989.63 | $832.05 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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30 | 15 | $154.87 | $80.01 |
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22840
Placement of stabilizing device to back of 1 spine bone in neck
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24 | 24 | $2892.00 | $824.91 |
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22634
Fusion of additional segment of spine with partial removal of spine bone and disc
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14 | 13 | $1872.43 | $530.51 |
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63053
Partial removal of bone of additional segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back
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14 | 13 | $663.43 | $250.98 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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12 | 12 | $300.75 | $133.37 |
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22600
Fusion of spine in neck by posterior approach
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11 | 11 | $4907.00 | $1344.80 |
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63045
Partial removal of spine bone with release of upper spinal cord and/or nerves, 1 segment
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11 | 11 | $4936.55 | $772.09 |
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99406
Smoking and tobacco use intensive counseling, 4-10 minutes
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11 | 11 | $31.64 | $15.17 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Methocarbamol | Methocarbamol | 53 | 658 | $389.68 | 41 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 51 | 357 | $874.69 | 48 |
| Tramadol Hcl | Tramadol Hcl | 33 | 432 | $134.21 | 23 |
| Gabapentin | Gabapentin | 31 | 989 | $422.13 | 17 |
| Pregabalin | Pregabalin | 23 | 690 | $554.86 | — |
| Methylprednisolone | Methylprednisolone | 19 | 114 | $81.00 | 14 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 14 | 56 | $66.82 | 14 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207T00000X
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
NUCC Taxonomy Code: 207T00000X
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NEUROSURGERY
I20180801003637
FL
6305825324
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Cora Health Services Inc
5036 Se 110th St, Belleview, FL 344203759
Phone: 3526933378
Ocala Health Surgical Group Llc
4600 Sw 46th Ct, Ocala, FL 344745754
Phone: 3522912400
Cora Health Services Inc
3845 Se Lake Weir Ave, Ocala, FL 344809153
Phone: 3526933378
Cora Health Services Inc
8768 Se 165th Mulberry Ln, The Villages, FL 321625861
Phone: 3523295237
Ocala Health Surgical Group Llc
1431 Sw 1st Ave, Ocala, FL 344716500
Phone: 3524011000
Cora Health Services Inc
3845 Se Lake Weir Ave, Ocala, FL 344809153
Phone: 3526933378
Cora Health Services Inc
8768 Se 165th Mulberry Ln, The Villages, FL 321625861
Phone: 3523295237
Cora Health Services Inc
5036 Se 110th St, Belleview, FL 344203759
Phone: 3526933378
Cora Health Services Inc
2953 Traverse Trl, The Villages, FL 321632017
Phone: 3526933378
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Neurological Surgery
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Radiology - Neuroradiology
Doctor of Medicine (M.D.)
Neurological Surgery
Doctor of Medicine (M.D.)
Nurse Practitioner - Acute Care
Bachelor of Science in Nursing
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1725 SE 28TH LOOP STE 102, OCALA, FL 344715328 (Tel: 3526291743)
Registered at 2405 SE 17TH ST STE 201, OCALA, FL 344719190 (Tel: 3526902171)
NPI status registered as active in NPPES database
Registered at 7702 E 91ST ST, SUITE 220, TULSA, OK 741336054 (Tel: 9187649999)
Registered at 7702 E 91ST ST, SUITE 220, TULSA, OK 741336054 (Tel: 9187649999)
Recorded as JOHN MAIN, DO
Neurological Surgery (license number reported to NPPES: OK 4163)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Neurological Surgery Specialists in Ocala
- Dr. Thomas Oliver, MD
- Dr. Silvia Baxter, MD
- Dr. Daniel Robertson, MD
- Dr. Saravanan Karuppiah, MD
- Dr. Racheal Peterson, MD
- Dr. Shawn Rai, MD
Mailing Address
2405 Se 17th St Ste 201
Ocala, FL 344719190
Phone: 3526902171