Dr. Nathan Roesner , DO
Surgery • Boulder, CO
2595 Canyon Blvd Ste 360
Boulder, CO 803026745
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 April 2, 2007; this date does not establish years in practice.
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Published CMS data list 26 Original Medicare Part B services in 2019.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019. Published rows only; this is not a quality measure.
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Published Part B service records, 2019:
- 99204 — New patient outpatient office visit: 13 service units.
- 99214 — Established patient outpatient office visit: 13 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2018 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2019). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 30 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:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 15 prescription fills, including refills.
- Cephalexin — 15 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 the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 65% of clinicians listed under Surgery in Colorado (2024, 264 clinicians with data). Median for this group: 42. Middle half: 26 to 80.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 13 in 2018 to 26 in 2019.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018–2019.
Practice Location & Contact Primary Location
2595 Canyon Blvd Ste 360
Boulder, CO 803026745
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2005
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $3,580 in 2019
The total amount Medicare approved for these services in 2019. 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, 2019.
Paid by Medicare
About $2,850 in 2019
The part of the Medicare-allowed amount that Medicare itself paid in 2019, 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, 2019.
30-day fills
30 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
$181 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: $342.26 across 8 records.
By nature of payment
- Food and Beverage: $342.26 across 8 records.
Reporting-company totals (3 largest of 4)
- DePuy Synthes Sales Inc.: $167.14 across 3 records.
- Stryker Corporation: $104.26 across 2 records.
- ABBVIE INC.: $41.46 across 2 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
21 years (graduated 2005)
CMS Doctors and Clinicians data list 2005 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
2007
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. Roesner 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. Roesner 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 Boulder and Colorado
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 65% of clinicians listed under Surgery in Colorado (2024, 264 clinicians with data). Median for this group: 42. Middle half: 26 to 80.
Too few clinicians listed under Surgery in Boulder have Medicare Part D data for 2024 to compare.
Part D drug cost
Close to the middle for clinicians listed under Surgery in Colorado (2024, 264 clinicians with data). Median for this group: $230. Middle half: $92 to $633.
Too few clinicians listed under Surgery in Boulder have Medicare Part D data for 2024 to compare.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Roesner are from 2019.
10 active clinicians are listed under Surgery with a practice address in Boulder, CO (608 in Colorado).
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 went from 13 in 2018 to 26 in 2019.
- 2018: 13
- 2019: 26
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Medicare-allowed amount
Medicare-allowed amount increased 76% from $2,039 in 2018 to $3,580 in 2019.
- 2018: $2,039
- 2019: $3,580
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Paid by Medicare
Paid by Medicare increased 76% from $1,621 in 2018 to $2,850 in 2019.
- 2018: $1,621
- 2019: $2,850
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 44% from 54 in 2020 to 30 in 2024.
- 2020: 54
- 2021: 58
- 2022: 45
- 2023: 38
- 2024: 30
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30-day fills
30-day fills decreased 44% from 54 in 2020 to 30 in 2024.
- 2020: 54
- 2021: 58
- 2022: 45
- 2023: 38
- 2024: 30
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Part D drug cost
Part D drug cost went from $464 in 2020 to $181 in 2024.
- 2020: $464
- 2021: $461
- 2022: $381
- 2023: $292
- 2024: $181
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $170.85 in 2021 to $342.26 in 2025.
- 2021: $170.85
- 2022: $85.91
- 2023: $642.09
- 2024: $320.79
- 2025: $342.26
Sources: CMS Medicare Physician & Other Practitioners (2019), 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 $342.26.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| DePuy Synthes Sales Inc. |
Food and Beverage
In-kind items and services
|
NA | General | $100.97 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
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NA | General | $80.53 |
| DePuy Synthes Sales Inc. |
Food and Beverage
In-kind items and services
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TRUMATCH | General | $43.95 |
| Integra LifeSciences Corporation |
Food and Beverage
In-kind items and services
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OMNIGRAFT | General | $29.40 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
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NA | General | $23.73 |
| DePuy Synthes Sales Inc. |
Food and Beverage
In-kind items and services
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NA | General | $22.22 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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BOTOX | General | $21.37 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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NATRELLE SALINE-FILLED BREAST IMPLANTS | General | $20.09 |
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 2017–2018 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, 2018–2019; 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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13 | 13 | $256.00 | $165.77 |
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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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13 | 12 | $166.00 | $109.60 |
Source: CMS Part B by Provider and Service, 2019; 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 |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 15 | 96 | $120.89 | 13 |
| Cephalexin | Cephalexin | 15 | 99 | $59.90 | 13 |
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
Self-certified to NPPES: 2021-10-20NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PLASTIC AND RECONSTRUCTIVE SURGERY
I20120830000454
CO
4385891100
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2595 CANYON BLVD STE 360, BOULDER, CO 803026745 (Tel: 3034407546)
NPI status registered as active in NPPES database
Registered at 11700 W 2ND PL, MEDICAL PLAZA 2 STE 210, LAKEWOOD, CO 802281704 (Tel: 3039096977)
Registered at 11700 W 2ND PL, MEDICAL PLAZA 2 STE 210, LAKEWOOD, CO 802281704 (Tel: 3039096977)
Recorded as NATHAN ROESNER, D.O.
Surgery (license number reported to NPPES: CO 50492)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Boulder
- Dr. Kyle Marthaller, MD
- Dr. Charles Jones, MD
- Dr. Akinlolu Beckley, MD
- Dr. Ibrahim Cetindag, MD
- Dr. Susan Hagen, MD
- Dr. Stephen Johs, MD
Mailing Address
11700 W 2nd Pl, Medical Plaza 2 Ste 210
Lakewood, CO 802281704
Phone: 3039096977