Primary practice
Cei Physicians PSC, LLC
Cincinnati, Ohio
Find Dr. Johns' 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. Johns practices at Cei Physicians PSC, LLC in Cincinnati, Ohio.
Dr. Johns' NPI, 1407040884, was assigned on August 29, 2007. Dr. Johns graduated from Ohio State University College of Medicine in 2001. Dr. Johns holds Ohio license 35.125806.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Johns' primary practice is Cei Physicians PSC, LLC, at 604 Ivy Gtwy, Cincinnati, OH 45245 in Clermont County. The practice phone is (513) 984-5133.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Johns' primary practice is Cei Physicians PSC, LLC in Cincinnati, Ohio. Dr. Johns is also affiliated with Bethesda North Hospital. The medical group on file is OHC - Oncology Hematology Care. Dmand AI also links Dr. Johns to 3 more hospitals, 2 home health agencies, 1 group practice or clinic and 1 hospice, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johns practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cei Physicians PSC, LLC | Available with a free account |
| +8 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Hematology and oncology is Dr. Johns' primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dmand AI has Dr. Johns' licenses on file in 2 states: Ohio and Minnesota.
Counts of hematologists and oncologists 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
CMS data shows 63,788 Medicare services from Dr. Johns across 53 procedure codes in 2024, for 660 Medicare patients. Medicare paid $721,435 for them.
Medians across 452 hematologists and oncologists in Ohio with Dmand AI profiles that report each measure.
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. Johns?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johns and other hematologists and oncologists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
CMS counts 660 Medicare patients who saw Dr. Johns in 2024. The largest group is 65 to 74, with 331 patients. 74% of them have high cholesterol, and 72% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.86, 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. Johns' median patient age at 70, with 61% women.
Share of Medicare patients with each condition. A patient can have several.
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Median age 70
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
In 2024, Dr. Johns wrote 3,264 Medicare Part D claims for 508 patients. 84% of them were for generic drugs. CMS names the drug for 2,891 of them, across 60 drugs with 11 or more claims each, at $4,003,029 in total drug cost. In 2023, CMS named 2,342 claims across 48 drugs.
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Drugs named by CMS: 60 in 2024, 48 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
Dr. Johns accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
Source: Doctors and Clinicians National Downloadable File (CMS)
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.
Dmand AI links Dr. Johns to 2 clinical trials. Conditions studied include Pancreatic Neoplasms, Neoplasm Metastasis and Pancreatic Diseases.
Conditions in Dr. Johns' trials
Sources: ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
CMS Open Payments shows 68 general payments to Dr. Johns from 23 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 56% of the total. Novartis Pharmaceuticals Corporation paid the most, $1,467.
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Johns graduated from Ohio State University College of Medicine in 2001.
Source: Dmand AI Professional 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 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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (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 |
| 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
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
Dr. Mark E. Johns' NPI number is 1407040884. It was assigned on August 29, 2007, and it is active in the NPI Registry.
Dr. Mark E. Johns is a hematologist and oncologist in Cincinnati, Ohio. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Dr. Johns practices at 604 Ivy Gtwy, Cincinnati, OH 45245. Dr. Johns' primary practice is Cei Physicians PSC, LLC in Cincinnati, Ohio. Dmand AI also links Dr. Johns to 3 hospitals, 2 home health agencies, 1 group practice or clinic and 1 hospice.
The practice phone on file for Dr. Johns is (513) 984-5133.
Dr. Johns holds Ohio license 35.125806, one of the licenses on file in 2 states.
Dmand AI has state licenses on file for Dr. Johns in Ohio and Minnesota.
Dr. Johns is affiliated with Bethesda North Hospital. Dmand AI links Dr. Johns to 3 more hospitals.
Dr. Johns is linked to OHC - Oncology Hematology Care.
Yes. CMS data shows Dr. Johns billed Medicare for 63,788 services in 2024, and Dr. Johns accepts Medicare assignment.
CMS counts 660 Medicare patients who saw Dr. Johns in 2024, with an average age of 73.
In 2024, Dr. Johns' most billed Medicare services were medicare temporary code (Q0138), injected or infused drug (J9267) and injected or infused drug (J9271).
Dr. Johns graduated from Ohio State University College of Medicine in 2001.
In 2024 Medicare Part D data, Dr. Johns' most prescribed drugs by claims were Anastrozole, Eliquis and Alendronate Sodium.
CMS Open Payments shows $3,305 in general payments to Dr. Johns from 23 companies from 2017 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
Dr. Johns graduated from medical school in 2001, 25 years ago.
Dr. Johns has worked on 2 clinical trials.
Selling to hematology and oncology practices?
See hematologists and oncologists in Ohio by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.