Dr. Mark E. Johnson, MD
- Medicare services, 2024
- 58
- Medicare patients, 2024
- 60
- Part D claims, 2024
- 100
- Publications
- 3
- Hospital affiliations
- 3
- Practice address
- 7700 Floyd Curl Dr, San Antonio, TX 78229
- Practice phone
- Call (210) 575-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Methodist Hospital (TX)
San Antonio, Texas
Find Dr. Johnson'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.
Dr. Mark E. Johnson is an emergency medicine physician in San Antonio, Texas
Dr. Johnson practices at Methodist Hospital (TX) in San Antonio, Texas.
Dr. Johnson's NPI, 1669578357, was assigned on September 16, 2006. Dr. Johnson graduated from Rush Medical College in 1996. Dr. Johnson's Washington license number on file is MD00044906.
- NPI
- 1669578357NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284523176
- NPI enumeration date
- September 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (210) 575-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark E. Johnson practices at Methodist Hospital (TX) in San Antonio, Texas
Dr. Johnson's primary practice is Methodist Hospital (TX), at 7700 Floyd Curl Dr, San Antonio, TX 78229 in Bexar County. The practice phone is (210) 575-4000.
- Methodist Hospital (TX)7700 Floyd Curl Dr, San Antonio, TX 78229 · Bexar CountyPhone(210) 575-4000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark E. Johnson is affiliated with 4 sites of care and 6 medical groups
Dr. Johnson's primary practice is Methodist Hospital (TX) in San Antonio, Texas. Dr. Johnson is also affiliated with Methodist Hospital. The medical group on file is Concord Medical Group. Dmand AI also links Dr. Johnson to 2 more hospitals and 5 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark E. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Methodist Hospital (TX) | Available with a free account |
| +3 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark E. Johnson is one of 4,831 emergency medicine physicians in Texas
Emergency medicine is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Johnson is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Johnson's licenses on file in 6 states: Washington, Texas, New York, California, Florida and Illinois.
Specialties and state licenses
- Emergency medicine, WashingtonPrimary
- Texas license
- New York license
- California license
- Florida license
- Illinois license
Emergency medicine physicians near Dr. Johnson
Counts of emergency medicine physicians 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. Johnson billed Medicare for 58 services in 2024
CMS data shows 58 Medicare services from Dr. Johnson across 2 procedure codes in 2024, for 60 Medicare patients. Medicare paid $6,219 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Johnson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2222024: 5874%
- Tests and treatments
- 2023: 792024: 0100%
Dr. Johnson compared with the Texas median for emergency medicine physicians, 2024
- Dr. Johnson
- Texas median
- Medicare services
- 58vs 22574% below
- Medicare patients
- 60vs 20671% below
- Part D claims
- 41vs 7445% below
Medians across 4,588 emergency medicine physicians in Texas with Dmand AI profiles that report each measure.
Dr. Johnson's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Johnson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johnson and other emergency medicine physicians in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark E. Johnson treated 60 Medicare patients in 2024, average age 76
CMS counts 60 Medicare patients who saw Dr. Johnson in 2024. The largest group is 75 to 84, with 24 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 1.84, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 39, with 59% women.
Dr. Johnson's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Johnson's Medicare patients by sex, 2024
- Women2948%
- Men3152%
Chronic conditions among Dr. Johnson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Ischemic heart disease50%
- Diabetes47%
- Mood disorders40%
- Atrial fibrillation38%
- Anxiety37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Johnson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 39
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark E. Johnson wrote 100 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 100 Medicare Part D claims for 56 patients. 96% of them were for generic drugs. CMS names the drug for 41 of them, across 3 drugs with 11 or more claims each, at $174 in total drug cost. In 2023, CMS named 278 claims across 12 drugs.
Dr. Johnson's Part D claims by kind of drug, 2024
- Generic96 claims96%
- Brand-name and other4 claims4%
Dr. Johnson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Johnson's Part D claims, 2024
- Opioids15%15 of 100 claims
- Antibiotics34%34 of 100 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2782024: 4185%
Drugs named by CMS: 3 in 2024, 12 in 2023.
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
How Dr. Mark E. Johnson takes part in Medicare
Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark E. Johnson has 3 publications on record
Dmand AI links 3 papers to Dr. Johnson, published from 2014 to 2017.
Recent publications by Dr. Johnson
See who Dr. Johnson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Johnson works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark E. Johnson received $89 in industry payments from 2022 to 2024
CMS Open Payments shows 5 general payments to Dr. Johnson from 4 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $33.
General payments to Dr. Johnson by program year, 2022 to 2024
Companies that paid Dr. Johnson the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark E. Johnson graduated from Rush Medical College
Dr. Johnson graduated from Rush Medical College in 1996.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Mark E. Johnson accepts plans from 15 insurance carriers
Dr. Johnson is in network with 15 carriers, including Elevance, United Healthcare and Aetna. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Elevance
- United Healthcare
- Aetna
- Blue Cross Blue Shield of Michigan
- Alliant Health Plans
- HCSC
- Aspirus Health Plan
- Baylor Scott and White
- +7 more carriersWith a free account
Plan types Dr. Johnson accepts, by number of carriers
- HMO9
- PPO8
- POS6
- EPO3
- Medicare2
Source: Dmand AI Insurance Network Data
Sources for Dr. Mark E. Johnson'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 DataDmand AI Org Hierarchy 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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. Johnson
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. Johnson's NPI number?
Dr. Mark E. Johnson's NPI number is 1669578357. It was assigned on September 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark E. Johnson?
Dr. Mark E. Johnson is an emergency medicine physician in San Antonio, Texas. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Mark E. Johnson practice?
Dr. Johnson practices at 7700 Floyd Curl Dr, San Antonio, TX 78229. Dr. Johnson's primary practice is Methodist Hospital (TX) in San Antonio, Texas. Dmand AI also links Dr. Johnson to 2 hospitals and 5 medical groups.
What is Dr. Mark E. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (210) 575-4000.
What is Dr. Mark E. Johnson's medical license number?
Dr. Johnson's Washington license number on file is MD00044906, one of the licenses on file in 6 states.
Which states has Dr. Mark E. Johnson been licensed in?
Dmand AI has state licenses on file for Dr. Johnson in Washington (2005 to 2017), Texas (2018 to 2026), New York (2021 to 2023), California (2014 to 2021), Florida (2014 to 2018) and Illinois (1996 to 2005).
Which hospitals is Dr. Mark E. Johnson affiliated with?
Dr. Johnson is affiliated with Methodist Hospital. Dmand AI links Dr. Johnson to 2 more hospitals.
What medical group is Dr. Mark E. Johnson part of?
Dr. Johnson is linked to Concord Medical Group. Dmand AI links Dr. Johnson to 5 more medical groups.
Does Dr. Mark E. Johnson accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 58 services in 2024, and Dr. Johnson accepts Medicare assignment.
How many Medicare patients does Dr. Mark E. Johnson see?
CMS counts 60 Medicare patients who saw Dr. Johnson in 2024, with an average age of 76.
Show 8 more questionsShow fewer questions
Is Dr. Mark E. Johnson board certified?
Yes. Dr. Johnson is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. Mark E. Johnson bill to Medicare?
In 2024, Dr. Johnson's most billed Medicare services were emergency department visit (99285) and emergency department visit (99284).
Where did Dr. Mark E. Johnson go to medical school?
Dr. Johnson graduated from Rush Medical College in 1996.
What drugs does Dr. Mark E. Johnson prescribe most?
In 2024 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Azithromycin, Tramadol HCl and Cephalexin.
Has Dr. Mark E. Johnson received payments from drug or device companies?
CMS Open Payments shows $89 in general payments to Dr. Johnson from 4 companies from 2022 to 2024. The largest total came from Abbvie Inc.
How long has Dr. Mark E. Johnson been practicing?
Dr. Johnson graduated from medical school in 1996, 30 years ago.
Does Dr. Mark E. Johnson do research?
Dmand AI links 3 publications to Dr. Johnson, published from 2014 to 2017.
What insurance does Dr. Mark E. Johnson accept?
Dr. Johnson is in network with 15 carriers, including Elevance, United Healthcare and Aetna. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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