Dr. David Gellis, MD
- Part D claims, 2024
- 16
- Industry payments
- $39
- Affiliated sites
- 2
- Medical groups
- 2
- State licenses
- 6
- Practice address
- 1692 Wadsworth Blvd Unit 101 Unit 101, Lakewood, CO 80214-5233
- Practice phone
- Call (303) 557-9747
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
One Medical
Primary care practice · Lakewood, Colorado
Find Dr. Gellis' 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.
Dr. David Gellis is an internist in Lakewood, Colorado
Dr. Gellis practices at One Medical in Lakewood, Colorado.
Dr. Gellis' NPI, 1548580368, was assigned on June 3, 2010. Dr. Gellis holds Massachusetts license 270640.
- NPI
- 1548580368NPI Registry (opens in a new tab)
- NPI enumeration date
- June 3, 2010
- NPI status
- Active
- Practice phone
- (303) 557-9747
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Gellis practices at One Medical in Lakewood, Colorado
Dr. Gellis' primary practice is One Medical, at 1692 Wadsworth Blvd Unit 101 Unit 101, Lakewood, CO 80214-5233. The practice phone is (303) 557-9747.
- One Medical1692 Wadsworth Blvd Unit 101 Unit 101, Lakewood, CO 80214-5233Phone(303) 557-9747
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Gellis is affiliated with 2 sites of care and 2 medical groups
Dr. Gellis' primary practice is One Medical in Lakewood, Colorado. The medical group on file is One Medical. Dmand AI also links Dr. Gellis to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. David Gellis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gellis practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| One Medical | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Gellis is one of 1,668 internists in Colorado
Internal medicine is Dr. Gellis' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Gellis' licenses on file in 6 states: Massachusetts, Arizona, Colorado, Georgia, New Hampshire and Washington.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
- Arizona license
- Colorado license
- Georgia license
- New Hampshire license
- Washington license
Internists near Dr. Gellis
Counts of internists 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
Dr. David Gellis' patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Dr. Gellis' median patient age at 74, with 75% women.
Dr. Gellis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women75%
- Men25%
Source: Dmand AI Patient Panel Data
Dr. David Gellis wrote 16 Medicare Part D claims in 2024
In 2024, Dr. Gellis wrote 16 Medicare Part D claims. 75% of them were for generic drugs. They cover 2 drugs, with $467 in total drug cost.
Dr. Gellis' Part D claims by kind of drug, 2024
- Generic12 claims75%
- Brand-name and other4 claims25%
Dr. Gellis' most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. David Gellis received $39 in industry payments from 2017 to 2025
CMS Open Payments shows 2 general payments to Dr. Gellis from 2 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $23.
General payments to Dr. Gellis by program year, 2017 to 2025
Companies that paid Dr. Gellis the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. David Gellis'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 and Drug (CMS) (opens in a new tab)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 Dr. David Gellis
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. David Gellis' NPI number?
Dr. David Gellis' NPI number is 1548580368. It was assigned on June 3, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. David Gellis?
Dr. David Gellis is an internist in Lakewood, Colorado. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. David Gellis practice?
Dr. Gellis practices at 1692 Wadsworth Blvd Unit 101 Unit 101, Lakewood, CO 80214-5233. Dr. Gellis' primary practice is One Medical in Lakewood, Colorado. Dmand AI also links Dr. Gellis to 1 group practice or clinic and 1 medical group.
What is Dr. David Gellis' office phone number?
The practice phone on file for Dr. Gellis is (303) 557-9747.
What is Dr. David Gellis' medical license number?
Dr. Gellis holds Massachusetts license 270640, one of the licenses on file in 6 states.
Which states has Dr. David Gellis been licensed in?
Dmand AI has state licenses on file for Dr. Gellis in Massachusetts, Arizona, Colorado, Georgia, New Hampshire and Washington.
What medical group is Dr. David Gellis part of?
Dr. Gellis is linked to One Medical. Dmand AI links Dr. Gellis to 1 more medical group.
What drugs does Dr. David Gellis prescribe most?
In 2018 Medicare Part D data, Dr. Gellis' most prescribed drugs by claims were Levothyroxine Sodium and Lisinopril.
Has Dr. David Gellis received payments from drug or device companies?
CMS Open Payments shows $39 in general payments to Dr. Gellis from 2 companies from 2017 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. David Gellis been practicing?
Dr. Gellis' NPI was assigned in 2010.
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