Dr. Mark E. Elles, MD
- Medicare services, 2016
- 257
- Part D claims, 2016
- 320
- Affiliated sites
- 2
- Medical groups
- 2
- State license
- 1
- Practice address
- 1301 Wonder World Dr, San Marcos, TX 78666
- Practice phone
- Call (512) 353-8979
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Christus Santa Rosa Hospital - San Marcos
San Marcos, Texas
Find Dr. Elles' 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. Mark E. Elles is an internist in San Marcos, Texas
Dr. Elles practices at Christus Santa Rosa Hospital - San Marcos in San Marcos, Texas.
Dr. Elles' NPI, 1013928092, was assigned on August 11, 2006. Dr. Elles holds Colorado license 22074.
- NPI
- 1013928092NPI Registry (opens in a new tab)
- NPI enumeration date
- August 11, 2006
- NPI status
- Active
- Practice phone
- (512) 353-8979
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Mark E. Elles practices at Christus Santa Rosa Hospital - San Marcos in San Marcos, Texas
Dr. Elles' primary practice is Christus Santa Rosa Hospital - San Marcos, at 1301 Wonder World Dr, San Marcos, TX 78666 in Hays County. The practice phone is (512) 353-8979.
- Christus Santa Rosa Hospital - San Marcos1301 Wonder World Dr, San Marcos, TX 78666 · Hays CountyPhone(512) 353-8979
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark E. Elles is affiliated with 3 sites of care and 2 medical groups
Dr. Elles' primary practice is Christus Santa Rosa Hospital - San Marcos in San Marcos, Texas. Dmand AI also links Dr. Elles to 2 group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark E. Elles' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Elles practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Christus Santa Rosa Hospital - San Marcos | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark E. Elles is one of 8,437 internists in Texas
Internal medicine is Dr. Elles' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Elles is licensed in Colorado.
Specialties and state licenses
- Internal medicine, ColoradoPrimary
Internists near Dr. Elles
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. Mark E. Elles billed Medicare for 257 services in 2016
CMS data shows 257 Medicare services from Dr. Elles across 2 procedure codes in 2016. Medicare paid $16,046 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Elles compared with the Texas median for internists, 2016
- Dr. Elles
- Texas median
- Medicare services
- 257vs 53952% below
- Part D claims
- 320vs 28911% above
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Elles' most billed Medicare procedure codes, 2016
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Elles and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark E. Elles' patients have a median age of 79
Across all payers, Dmand AI patient panel data puts Dr. Elles' median patient age at 79, with 80% women.
Dr. Elles' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women80%
- Men20%
Source: Dmand AI Patient Panel Data
Dr. Mark E. Elles wrote 320 Medicare Part D claims in 2016
In 2016, Dr. Elles wrote 320 Medicare Part D claims. They cover 18 drugs, with $20,763 in total drug cost.
Dr. Elles' most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Sources for Dr. Mark E. Elles'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| 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. Mark E. Elles
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. Mark E. Elles' NPI number?
Dr. Mark E. Elles' NPI number is 1013928092. It was assigned on August 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark E. Elles?
Dr. Mark E. Elles is an internist in San Marcos, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mark E. Elles practice?
Dr. Elles practices at 1301 Wonder World Dr, San Marcos, TX 78666. Dr. Elles' primary practice is Christus Santa Rosa Hospital - San Marcos in San Marcos, Texas. Dmand AI also links Dr. Elles to 2 group practices and clinics and 2 medical groups.
What is Dr. Mark E. Elles' office phone number?
The practice phone on file for Dr. Elles is (512) 353-8979.
What is Dr. Mark E. Elles' medical license number?
Dr. Elles holds Colorado license 22074.
Does Dr. Mark E. Elles accept Medicare?
Yes. CMS data shows Dr. Elles billed Medicare for 257 services in 2016.
What services does Dr. Mark E. Elles bill to Medicare?
In 2016, Dr. Elles' most billed Medicare services were hospital inpatient care (99232) and hospital inpatient care (99233).
What drugs does Dr. Mark E. Elles prescribe most?
In 2016 Medicare Part D data, Dr. Elles' most prescribed drugs by claims were Lisinopril, Levothyroxine Sodium and Atorvastatin Calcium.
How long has Dr. Mark E. Elles been practicing?
Dr. Elles' NPI was assigned in 2006.
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