Dr. Peter J Lennarson , MD
Neurological Surgery โข Aurora, CO
12605 E 16th Ave
Aurora, CO 800452545
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. Peter Lennarson is listed in NPPES under Neurological Surgery.
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NPI assigned on May 8, 2006; this date does not establish years in practice.
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Published CMS data list 252 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ 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 โ New patient outpatient office visit: 53 service units.
- 22614 โ Fusion of additional segment of spine: 38 service units.
- 99205 โ New patient outpatient office visit: 28 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ 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 11 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 13 Medicare Part D prescriptions, including refills, in 2018.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2018. Published rows only; this is not a quality measure.
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Published Part D records, 2018:
- Oxycodone Hcl โ 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2018. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Neurological Surgery in Aurora, CO (2024, 22 clinicians with data). Median for this group: 158. Middle half: 98 to 273.
More Medicare Part B services than 60% of clinicians listed under Neurological Surgery in Colorado (2024, 90 clinicians with data). Median for this group: 179. Middle half: 94 to 366.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 206 in 2020 to 252 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
12605 E 16th Ave
Aurora, CO 800452545
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Denver, CO. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: University Physicians Incorporated. 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
University Of Wisconsin School Of Medicine
1995
What Public CMS Data Show
Neurological Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
179 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 โ by Provider, 2024.
Medicare-allowed amount
About $70,546 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 โ by Provider and Service, 2024.
Paid by Medicare
About $55,542 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 โ by Provider and Service, 2024.
30-day fills
13 standardized 30-day fills in 2018
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
$195 in 2018
The total cost of these prescriptions in 2018, 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 โ by Provider and Drug, 2018.
Open Payments general payments, program year 2025
All general payments: $41.71 across 2 records.
By nature of payment
- Food and Beverage: $41.71 across 2 records.
Reporting-company totals
- Solventum Corporation: $22.37 across 1 record.
- Medtronic, Inc.: $19.34 across 1 record.
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
31 years (graduated 1995)
CMS Doctors and Clinicians data list 1995 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, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Lennarson 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. Lennarson 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 Aurora and Colorado
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Neurological Surgery in Aurora, CO (2024, 22 clinicians with data). Median for this group: 158. Middle half: 98 to 273.
More Medicare Part B services than 60% of clinicians listed under Neurological Surgery in Colorado (2024, 90 clinicians with data). Median for this group: 179. Middle half: 94 to 366.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Neurological Surgery in Aurora, CO (2024, 22 clinicians with data). Median for this group: $26,512. Middle half: $14,874 to $53,412.
A higher Medicare-allowed amount than 70% of clinicians listed under Neurological Surgery in Colorado (2024, 90 clinicians with data). Median for this group: $31,391. Middle half: $14,507 to $79,100.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Neurological Surgery in Aurora, CO (2024, 22 clinicians with data). Median for this group: $21,040. Middle half: $11,353 to $41,572.
A higher Medicare payment amount than 70% of clinicians listed under Neurological Surgery in Colorado (2024, 90 clinicians with data). Median for this group: $24,036. Middle half: $11,015 to $62,524.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Lennarson are from 2018.
50 active clinicians are listed under Neurological Surgery with a practice address in Aurora, CO (175 in Colorado).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Aurora
30% of these 50 clinicians have the CMS telehealth indicator.
58% of these 50 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 22% from 206 in 2020 to 252 in 2024.
- 2020: 206
- 2021: 297
- 2022: 261
- 2023: 219
- 2024: 252
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Medicare-allowed amount
Medicare-allowed amount increased 34% from $52,545 in 2020 to $70,546 in 2024.
- 2020: $52,545
- 2021: $91,202
- 2022: $71,113
- 2023: $70,277
- 2024: $70,546
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Paid by Medicare
Paid by Medicare increased 34% from $41,514 in 2020 to $55,542 in 2024.
- 2020: $41,514
- 2021: $72,758
- 2022: $56,037
- 2023: $55,598
- 2024: $55,542
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 69% from 42 in 2014 to 13 in 2018.
- 2014: 42
- 2015: 44
- 2016: 42
- 2017: 64
- 2018: 13
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30-day fills
30-day fills decreased 85% from 86 in 2014 to 13 in 2018.
- 2014: 86
- 2015: 75
- 2016: 64
- 2017: 70
- 2018: 13
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Part D drug cost
Part D drug cost went from $444 in 2014 to $195 in 2018.
- 2014: $444
- 2015: $872
- 2016: $693
- 2017: $1,197
- 2018: $195
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $152.20 in 2021 to $41.71 in 2025.
- 2021: $152.20
- 2022: $412.85
- 2023: $211.30
- 2024: $955.20
- 2025: $41.71
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2018), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท 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 โ December 31, 2025): fewer than 11 records totaling $41.71.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Solventum Corporation |
Food and Beverage
Cash or cash equivalent
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PREVENA | General | $22.37 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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OSTEOCOOL RF ABLATION SYSTEM | General | $19.34 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2018โ2023 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 โ by Provider and Service data, 2019โ2024; 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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53 | 53 | $530.00 | $129.16 |
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22614
Fusion of additional segment of spine
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38 | 16 | $4711.00 | $378.94 |
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99205
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
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28 | 28 | $720.00 | $176.33 |
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61783
Computer-assisted spinal procedure
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24 | 22 | $1224.00 | $223.94 |
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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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19 | 19 | $572.00 | $142.75 |
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22853
Insertion of cage or mesh device to spine bone and disc space during spine fusion
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18 | 14 | $1351.00 | $250.63 |
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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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18 | 18 | $388.00 | $96.25 |
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22842
Placement of stabilizing device to back, 3-6 spine bone segments
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17 | 16 | $6951.00 | $739.26 |
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63047
Partial removal of spine bone with release of lower spinal cord and/or nerves, 1 segment
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15 | 15 | $9531.25 | $885.50 |
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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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11 | 11 | $1246.00 | $251.26 |
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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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11 | 11 | $512.00 | $129.05 |
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 2018.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 13 | 117 | $195.11 | โ |
Source: CMS Part D by Provider and Drug, 2018; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-04-14NUCC 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
I20130904000291
CO
4183669898
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
University Physicians Incorporated
12605 E 16th Ave, Aurora, CO 800452545
Phone: 7208480000
Secondary Practice Locations
2045 N Franklin St
Denver, CO 802055437
Phone: 3033384545
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine - Advanced Heart Failure and Transplant Cardiology
Doctor of Medicine (M.D.)
Physical Medicine & Rehabilitation
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Obstetrics & Gynecology - Gynecologic Oncology
Doctor of Medicine (M.D.)
Internal Medicine - Hospice and Palliative Medicine
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 12605 E 16TH AVE, AURORA, CO 800452545 (Tel: 7208480000)
Registered at PO BOX 110429, AURORA, CO 800420429
Neurological Surgery (license number reported to NPPES: NE 23280)
NPI status registered as active in NPPES database
Registered at 2045 N FRANKLIN ST, DENVER, CO 802055437 (Tel: (303) 338-4545)
Registered at 2045 N FRANKLIN ST, DENVER, CO 802055437 (Tel: (303) 338-4545)
Recorded as PETER LENNARSON, MD
Neurological Surgery (license number reported to NPPES: NE 23280)
NPI status registered as active in NPPES database
Registered at 2045 FRANKLIN ST, DENVER, CO 802055437 (Tel: 3033384545)
Registered at 2045 FRANKLIN ST, DENVER, CO 802055437 (Tel: 3033384545)
Recorded as PETER LENNARSON, MD
Neurological Surgery (license number reported to NPPES: CO 52461)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Neurological Surgery Specialists in Aurora
- Dr. Michael Yang, MD
- Dr. Peter Fecci, MD, PhD
- Dr. Vadim Tsvankin, MD
- Dr. Joshua Seinfeld, MD
- Dr. Zach Folzenlogen, MD
- Dr. Colin Buchanan, MD
More public profiles in Colorado
Directory navigation, in NPI number order.
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- Candice Sobanski, MD Emergency Medicine ยท Denver
- Jason Knudtson, MD Surgery ยท Parker
- Paul Miller, MD Anesthesiology ยท Greenwood Village
- Martin Strand, MD Emergency Medicine ยท Englewood
- Dale Bowen, PhD Clinical Neuropsychologist ยท Grand Junction
- Jack Drew, MD Radiology - Diagnostic Radiology ยท Colorado Springs
- Paige Neifert, MD Dermatology ยท Colorado Springs
- Thomas Donnelly, MD Internal Medicine - Pulmonary Disease ยท Aurora
- Ronald Kramer, MD Specialist ยท Golden
- Steven Archer, MD Family Medicine ยท Wheat Ridge
- Patrick Barry, MD Family Medicine ยท Fraser
Mailing Address
Po Box 110429
Aurora, CO 800420429