Dr. John Joseph Oconnor , MD
General Practice • Prescott, AZ
3109 Clearwater Drive, Ste A
Prescott, AZ 86305
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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NPI assigned on July 14, 2005; this date does not establish years in practice.
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Published CMS data list 1,485 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:
- 95886 — Needle measurement of electrical activity in arm or leg muscles, complete study: 769 service units.
- 95910 — Nerve conduction, 7-8 studies: 260 service units.
- 95908 — Nerve conduction, 3-4 studies: 108 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 9 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 190 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:
- Carbidopa-Levodopa (Carbidopa/Levodopa) — 36 prescription fills, including refills.
- Carbamazepine Er (Carbamazepine) — 26 prescription fills, including refills.
- Levetiracetam — 23 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 10 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 80% of clinicians listed under General Practice in Arizona (2024, 42 clinicians with data). Median for this group: 296. Middle half: 98 to 1,125.
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 1,666 in 2020 to 1,485 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
3109 Clearwater Drive
Ste A
Prescott, AZ 86305
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Chicago, Pritzker School Of Medicine
1986
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
572 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 $161,032 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 $119,000 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
399 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
$74,345 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 2022
All general payments: $65.37 across 3 records.
By nature of payment
- Food and Beverage: $65.37 across 3 records.
Reporting-company totals
- ABBVIE INC.: $65.37 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 2022 (published June 30, 2026).
Years since graduation
40 years (graduated 1986)
CMS Doctors and Clinicians data list 1986 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
2005
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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. Oconnor 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. Oconnor 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 Prescott and Arizona
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 80% of clinicians listed under General Practice in Arizona (2024, 42 clinicians with data). Median for this group: 296. Middle half: 98 to 1,125.
Too few clinicians listed under General Practice in Prescott have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under General Practice in Arizona (2024, 42 clinicians with data). Median for this group: $28,517. Middle half: $7,437 to $79,116.
Too few clinicians listed under General Practice in Prescott have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under General Practice in Arizona (2024, 42 clinicians with data). Median for this group: $20,687. Middle half: $5,470 to $61,475.
Too few clinicians listed under General Practice in Prescott have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Close to the middle for clinicians listed under General Practice in Arizona (2024, 64 clinicians with data). Median for this group: 311. Middle half: 37 to 1,020.
Too few clinicians listed under General Practice in Prescott 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 General Practice in Arizona (2024, 64 clinicians with data). Median for this group: $7,630. Middle half: $325 to $63,651.
Too few clinicians listed under General Practice in Prescott have Medicare Part D data for 2024 to compare.
5 active clinicians are listed under General Practice with a practice address in Prescott, AZ (228 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
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 decreased 11% from 1,666 in 2020 to 1,485 in 2024.
- 2020: 1,666
- 2021: 1,447
- 2022: 1,440
- 2023: 1,391
- 2024: 1,485
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Medicare-allowed amount
Medicare-allowed amount decreased 18% from $196,747 in 2020 to $161,032 in 2024.
- 2020: $196,747
- 2021: $165,272
- 2022: $171,544
- 2023: $151,181
- 2024: $161,032
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Paid by Medicare
Paid by Medicare decreased 19% from $146,045 in 2020 to $119,000 in 2024.
- 2020: $146,045
- 2021: $123,688
- 2022: $126,550
- 2023: $111,095
- 2024: $119,000
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 58% from 451 in 2020 to 190 in 2024.
- 2020: 451
- 2021: 433
- 2022: 305
- 2023: 228
- 2024: 190
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30-day fills
30-day fills decreased 53% from 843 in 2020 to 399 in 2024.
- 2020: 843
- 2021: 733
- 2022: 558
- 2023: 421
- 2024: 399
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Part D drug cost
Part D drug cost decreased 67% from $222,202 in 2020 to $74,345 in 2024.
- 2020: $222,202
- 2021: $299,171
- 2022: $257,405
- 2023: $131,539
- 2024: $74,345
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $21.10 in 2021 to $65.37 in 2022.
- 2021: $21.10
- 2022: $65.37
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2022), 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 2022 (payments made January 1 – December 31, 2022): fewer than 11 records totaling $65.37.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
UBRELVY | General | $30.00 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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UBRELVY | General | $18.99 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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QULIPTA | General | $16.38 |
Source: CMS Open Payments, program year 2022, 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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95886
Needle measurement of electrical activity in arm or leg muscles, complete study
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769 | 466 | $92.43 | $87.76 |
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95910
Nerve conduction, 7-8 studies
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260 | 258 | $168.63 | $159.99 |
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95908
Nerve conduction, 3-4 studies
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108 | 107 | $107.53 | $102.14 |
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95885
Needle measurement of electrical activity in arm or leg muscles, limited study
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87 | 52 | $59.27 | $56.30 |
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95909
Nerve conduction, 5-6 studies
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82 | 82 | $129.10 | $122.60 |
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95911
Nerve conduction, 9-10 studies
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74 | 74 | $203.49 | $192.97 |
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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 | 41 | $123.61 | $117.64 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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35 | 28 | $87.68 | $83.55 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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11 | 11 | $173.99 | $165.46 |
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 |
|---|---|---|---|---|---|
| Carbidopa-Levodopa | Carbidopa/Levodopa | 36 | 2,358 | $2,124.41 | — |
| Carbamazepine Er | Carbamazepine | 26 | 780 | $793.65 | — |
| Levetiracetam | Levetiracetam | 23 | 2,070 | $1,920.42 | — |
| Lamotrigine | Lamotrigine | 23 | 2,130 | $1,090.46 | — |
| Clopidogrel | Clopidogrel Bisulfate | 19 | 1,780 | $269.74 | — |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 15 | 907 | $653.28 | — |
| Divalproex Sodium Er | Divalproex Sodium | 14 | 900 | $565.17 | — |
| Fluoxetine Hcl | Fluoxetine Hcl | 12 | 360 | $111.96 | — |
| Valproic Acid | Valproic Acid (As Sodium Salt) | 11 | 330 | $421.42 | — |
| Copaxone | Glatiramer Acetate | 11 | 308 | $66,394.50 | — |
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: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NEUROLOGY
I20050524001234
AZ
4486696028
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History
NPI enumerated July 14, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other General Practices in Prescott
Healthcare providers in PrescottMailing Address
3109 Clearwater Drive, Ste A
Prescott, AZ 86305
Phone: 9287781066