Jonathan Ellis Welker, PA-C
- Medicare patients, 2024
- 234
- Part D claims, 2024
- 1,872
- Hospital affiliations
- 1
- Industry payments
- $27
- Medical group
- 1
- Practice address
- 1755 48th St, Boulder, CO 80301
- Practice phone
- Call (303) 604-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Endoscopy Center of the Rockies
Surgery Center - Medicare-Certified · Boulder, Colorado
Find Jonathan Welker'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.
Jonathan Ellis Welker is a physician assistant in Boulder, Colorado
Jonathan Welker practices at Endoscopy Center of the Rockies in Boulder, Colorado.
Jonathan Welker's NPI, 1770812588, was assigned on December 8, 2009. Jonathan Welker holds Colorado license PA.0002934.
- NPI
- 1770812588NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244374924
- NPI enumeration date
- December 8, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (303) 604-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Jonathan Ellis Welker practices at Endoscopy Center of the Rockies in Boulder, Colorado
Jonathan Welker's primary practice is Endoscopy Center of the Rockies, at 1755 48th St, Boulder, CO 80301. The practice phone is (303) 604-5000.
- Endoscopy Center of the Rockies1755 48th St, Boulder, CO 80301Phone(303) 604-5000
Source: Dmand AI Affiliation Data
Jonathan Ellis Welker is affiliated with 2 sites of care and 1 medical group
Jonathan Welker's primary practice is Endoscopy Center of the Rockies in Boulder, Colorado. Jonathan Welker is also affiliated with Foothills Hospital. The medical group on file is Boulder Community Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Jonathan Ellis Welker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Jonathan Welker practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Endoscopy Center of the Rockies | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Jonathan Ellis Welker is one of 1,042 physician assistants in Colorado
Medical is Jonathan Welker's primary specialty in the NPI Registry, under taxonomy code 363AM0700X. Jonathan Welker is licensed in Colorado.
Specialties and state licenses
- Medical physician assistant, ColoradoPrimary
Physician assistants near Jonathan Welker
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
Jonathan Ellis Welker treated 234 Medicare patients in 2024, average age 72
CMS counts 234 Medicare patients who saw Jonathan Welker in 2024. The largest group is 65 to 74, with 96 patients. 69% of them have high cholesterol, and 47% have arthritis. 18% are also on Medicaid. Their average risk score is 1.13, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Jonathan Welker's median patient age at 68, with 62% women.
Jonathan Welker's Medicare patients by age, 2024
Jonathan Welker's Medicare patients by sex, 2024
- Women12955%
- Men10545%
Chronic conditions among Jonathan Welker's Medicare patients, 2024
- High cholesterol69%
- Arthritis47%
- High blood pressure47%
- Mood disorders37%
- Depression32%
- Anxiety29%
- Ischemic heart disease27%
- Osteoporosis26%
Share of Medicare patients with each condition. A patient can have several.
Jonathan Welker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Jonathan Ellis Welker wrote 1,872 Medicare Part D claims in 2024
In 2024, Jonathan Welker wrote 1,872 Medicare Part D claims for 311 patients. 87% of them were for generic drugs.
Jonathan Welker's Part D claims by kind of drug, 2024
- Generic1,631 claims87%
- Brand-name and other241 claims13%
Drug classes CMS tracks in Jonathan Welker's Part D claims, 2024
- Antipsychotics, patients 65 and over1%26 of 1,872 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Jonathan Ellis Welker offers telehealth to Medicare patients
Jonathan Welker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Jonathan Welker as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Jonathan Ellis Welker received $27 in industry payments in 2025
CMS Open Payments shows 1 general payment to Jonathan Welker from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $27.
Companies that paid Jonathan Welker 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 Jonathan Ellis Welker'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 Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 Jonathan Ellis Welker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Jonathan Ellis Welker's NPI number?
Jonathan Ellis Welker's NPI number is 1770812588. It was assigned on December 8, 2009, and it is active in the NPI Registry.
What does Jonathan Ellis Welker specialize in?
Jonathan Ellis Welker is a physician assistant in Boulder, Colorado. The primary specialty in the NPI Registry is Medical Physician Assistant (taxonomy code 363AM0700X).
Where does Jonathan Ellis Welker practice?
Jonathan Welker practices at 1755 48th St, Boulder, CO 80301. Jonathan Welker's primary practice is Endoscopy Center of the Rockies in Boulder, Colorado.
What is Jonathan Ellis Welker's office phone number?
The practice phone on file for Jonathan Welker is (303) 604-5000.
What is Jonathan Ellis Welker's medical license number?
Jonathan Welker holds Colorado license PA.0002934.
Which hospitals is Jonathan Ellis Welker affiliated with?
Jonathan Welker is affiliated with Foothills Hospital.
What medical group is Jonathan Ellis Welker part of?
Jonathan Welker is linked to Boulder Community Health.
Does Jonathan Ellis Welker accept Medicare?
Yes. CMS lists Jonathan Welker as accepting Medicare assignment.
Does Jonathan Ellis Welker offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Jonathan Welker as offering telehealth services.
How many Medicare patients does Jonathan Ellis Welker see?
CMS counts 234 Medicare patients who saw Jonathan Welker in 2024, with an average age of 72.
Has Jonathan Ellis Welker received payments from drug or device companies?
CMS Open Payments shows $27 in general payments to Jonathan Welker from 1 company from 2025 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Jonathan Ellis Welker been practicing?
Jonathan Welker graduated from medical school in 2009, 17 years ago.
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