Gregory Ryan Tollefsen, ATC, PA-C
- Part D claims, 2024
- 105
- Industry payments
- $472
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 3503 Samson Way Suite 108 Suite 108, Bellevue, NE 68123-4303
- Practice phone
- Call (402) 592-2055
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
The Asthma & Allergy Center
Medical specialty practice · Bellevue, Nebraska
Find Gregory Tollefsen'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.
Gregory Ryan Tollefsen is a physician assistant in Bellevue, Nebraska
Gregory Tollefsen practices at The Asthma & Allergy Center in Bellevue, Nebraska.
Gregory Tollefsen's NPI, 1801080734, was assigned on September 4, 2007. Gregory Tollefsen holds Nebraska license 1644.
- NPI
- 1801080734NPI Registry (opens in a new tab)
- NPI enumeration date
- September 4, 2007
- NPI status
- Active
- Practice phone
- (402) 592-2055
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory Ryan Tollefsen practices at The Asthma & Allergy Center in Bellevue, Nebraska
Gregory Tollefsen's primary practice is The Asthma & Allergy Center, at 3503 Samson Way Suite 108 Suite 108, Bellevue, NE 68123-4303. The practice phone is (402) 592-2055.
- The Asthma & Allergy Center3503 Samson Way Suite 108 Suite 108, Bellevue, NE 68123-4303Phone(402) 592-2055
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory Ryan Tollefsen is affiliated with 1 site of care and 1 medical group
Gregory Tollefsen's primary practice is The Asthma & Allergy Center in Bellevue, Nebraska. The medical group on file is The Asthma & Allergy Center.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Gregory Ryan Tollefsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Tollefsen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Asthma & Allergy Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Gregory Ryan Tollefsen is one of 1,154 physician assistants in Nebraska
Physician assistant is Gregory Tollefsen's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Gregory Tollefsen is licensed in Nebraska.
Specialties and state licenses
- Physician assistant, NebraskaPrimary
Physician assistants near Gregory Tollefsen
Counts of physician assistants 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
Gregory Ryan Tollefsen's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Gregory Tollefsen's median patient age at 71, with 100% women.
Gregory Tollefsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Gregory Ryan Tollefsen wrote 105 Medicare Part D claims in 2024
In 2024, Gregory Tollefsen wrote 105 Medicare Part D claims for 48 patients. 60% of them were for generic drugs.
Gregory Tollefsen's Part D claims by kind of drug, 2024
- Generic63 claims60%
- Brand-name42 claims40%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Gregory Ryan Tollefsen received $472 in industry payments in 2025
CMS Open Payments shows 21 general payments to Gregory Tollefsen from 10 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $161.
Companies that paid Gregory Tollefsen the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Gregory Ryan Tollefsen'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Gregory Ryan Tollefsen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gregory Ryan Tollefsen's NPI number?
Gregory Ryan Tollefsen's NPI number is 1801080734. It was assigned on September 4, 2007, and it is active in the NPI Registry.
What does Gregory Ryan Tollefsen specialize in?
Gregory Ryan Tollefsen is a physician assistant in Bellevue, Nebraska. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Gregory Ryan Tollefsen practice?
Gregory Tollefsen practices at 3503 Samson Way Suite 108 Suite 108, Bellevue, NE 68123-4303. Gregory Tollefsen's primary practice is The Asthma & Allergy Center in Bellevue, Nebraska.
What is Gregory Ryan Tollefsen's office phone number?
The practice phone on file for Gregory Tollefsen is (402) 592-2055.
What is Gregory Ryan Tollefsen's medical license number?
Gregory Tollefsen holds Nebraska license 1644.
What medical group is Gregory Ryan Tollefsen part of?
Gregory Tollefsen is linked to The Asthma & Allergy Center.
Has Gregory Ryan Tollefsen received payments from drug or device companies?
CMS Open Payments shows $472 in general payments to Gregory Tollefsen from 10 companies from 2025 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Gregory Ryan Tollefsen been practicing?
Gregory Tollefsen graduated from medical school in 2011, 15 years ago.
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