Dr. Zachary Philip Johannesson, MD
- Medicare services, 2024
- 190
- Medicare patients, 2024
- 127
- Part D claims, 2024
- 104
- MIPS score, 2024
- 99
- Hospital affiliations
- 3
- Practice address
- 410 West 10th Avenue, Columbus, OH 43210
- Practice phone
- Call (614) 293-9700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Johannesson'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. Zachary Philip Johannesson is an emergency medicine physician in Columbus, Ohio
Dr. Johannesson practices at Ohio State University Hospital in Columbus, Ohio, part of The Ohio State University Wexner Medical Center.
Dr. Johannesson's NPI, 1184203663, was assigned on April 3, 2021. Dr. Johannesson graduated from Harvard Medical School in 2021. Dr. Johannesson holds New York license 328336.
- NPI
- 1184203663NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2163831082
- NPI enumeration date
- April 3, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (614) 293-9700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 28
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Zachary Philip Johannesson practices at Ohio State University Hospital in Columbus, Ohio
Dr. Johannesson's primary practice is Ohio State University Hospital, at 410 West 10th Avenue, Columbus, OH 43210 in Franklin County. The practice phone is (614) 293-9700.
- Ohio State University Hospital410 West 10th Avenue, Columbus, OH 43210 · Franklin CountyPhone(614) 293-9700
Source: Dmand AI Affiliation Data
Dr. Zachary Philip Johannesson is affiliated with 5 sites of care and 3 medical groups
Dr. Johannesson's primary practice is Ohio State University Hospital in Columbus, Ohio, part of The Ohio State University Wexner Medical Center. Dr. Johannesson is also affiliated with Gouverneur Hospital. The medical group on file is Gouverneur Hospital. Dmand AI also links Dr. Johannesson to 1 more hospital, 2 hospital outpatient departments and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Zachary Philip Johannesson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johannesson practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ohio State University Hospital | Available with a free account |
| +4 more sites and 2 medical groups | 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 The Ohio State University Wexner Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Zachary Philip Johannesson is one of 2,401 emergency medicine physicians in Ohio
Emergency medicine is Dr. Johannesson's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Johannesson is licensed in New York.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
Emergency medicine physicians near Dr. Johannesson
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. Zachary Philip Johannesson billed Medicare for 190 services in 2024
CMS data shows 190 Medicare services from Dr. Johannesson across 3 procedure codes in 2024, for 127 Medicare patients. Medicare paid $12,669 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Johannesson's Medicare services by type, 2024
- Office and hospital visits99
- Tests and treatments91
Dr. Johannesson compared with the Ohio median for emergency medicine physicians, 2024
- Dr. Johannesson
- Ohio median
- Medicare services
- 190vs 26629% below
- Medicare patients
- 127vs 24849% below
- Part D claims
- 12vs 6582% below
Medians across 2,448 emergency medicine physicians in Ohio with Dmand AI profiles that report each measure.
Dr. Johannesson'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Zachary Philip Johannesson treated 127 Medicare patients in 2024, average age 75
CMS counts 127 Medicare patients who saw Dr. Johannesson in 2024. The largest group is 65 to 74, with 41 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 30% are also on Medicaid. Their average risk score is 1.60, 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. Johannesson's median patient age at 59, with 57% women.
Dr. Johannesson's Medicare patients by age, 2024
Dr. Johannesson's Medicare patients by sex, 2024
- Women6148%
- Men6652%
Chronic conditions among Dr. Johannesson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Ischemic heart disease43%
- Diabetes42%
- Heart failure35%
- Anxiety32%
- Chronic kidney disease32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Johannesson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Zachary Philip Johannesson wrote 104 Medicare Part D claims in 2024
In 2024, Dr. Johannesson wrote 104 Medicare Part D claims for 80 patients. 94% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $10 in total drug cost.
Dr. Johannesson's Part D claims by kind of drug, 2024
- Generic98 claims94%
- Brand-name and other6 claims6%
Dr. Johannesson'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. Johannesson's Part D claims, 2024
- Antibiotics50%52 of 104 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Zachary Philip Johannesson scored 99 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 99 out of 100 for Dr. Johannesson for performance year 2024, reported through an alternative payment model (APM). Dr. Johannesson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Johannesson's MIPS scores, performance year 2024
- 99of 100Final score
- 87.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Zachary Philip Johannesson graduated from Harvard Medical School
Dr. Johannesson graduated from Harvard Medical School in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Zachary Philip Johannesson'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 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)Clinician Public Reporting: Overall MIPS Performance (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
Frequently asked questions about Dr. Zachary Philip Johannesson
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. Zachary Philip Johannesson's NPI number?
Dr. Zachary Philip Johannesson's NPI number is 1184203663. It was assigned on April 3, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Zachary Philip Johannesson?
Dr. Zachary Philip Johannesson is an emergency medicine physician in Columbus, Ohio. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Zachary Philip Johannesson practice?
Dr. Johannesson practices at 410 West 10th Avenue, Columbus, OH 43210. Dr. Johannesson's primary practice is Ohio State University Hospital in Columbus, Ohio, part of The Ohio State University Wexner Medical Center. Dmand AI also links Dr. Johannesson to 1 hospital, 2 hospital outpatient departments and 2 medical groups.
What is Dr. Zachary Philip Johannesson's office phone number?
The practice phone on file for Dr. Johannesson is (614) 293-9700.
What is Dr. Zachary Philip Johannesson's medical license number?
Dr. Johannesson holds New York license 328336.
Which hospitals is Dr. Zachary Philip Johannesson affiliated with?
Dr. Johannesson practices at Ohio State University Hospital in Columbus, Ohio. Dr. Johannesson is also affiliated with Gouverneur Hospital. Dmand AI links Dr. Johannesson to 1 more hospital.
What medical group is Dr. Zachary Philip Johannesson part of?
Dr. Johannesson is linked to Gouverneur Hospital. Dmand AI links Dr. Johannesson to 2 more medical groups.
Does Dr. Zachary Philip Johannesson accept Medicare?
Yes. CMS data shows Dr. Johannesson billed Medicare for 190 services in 2024, and Dr. Johannesson accepts Medicare assignment.
What is Dr. Zachary Philip Johannesson's MIPS score?
Dr. Johannesson's MIPS final score for performance year 2024 is 99 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Zachary Philip Johannesson see?
CMS counts 127 Medicare patients who saw Dr. Johannesson in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Dr. Zachary Philip Johannesson bill to Medicare?
In 2024, Dr. Johannesson's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and emergency department visit (99284).
Where did Dr. Zachary Philip Johannesson go to medical school?
Dr. Johannesson graduated from Harvard Medical School in 2021.
What drugs does Dr. Zachary Philip Johannesson prescribe most?
In 2024 Medicare Part D data, Dr. Johannesson's most prescribed drugs by claims were Prednisone.
How long has Dr. Zachary Philip Johannesson been practicing?
Dr. Johannesson graduated from medical school in 2021, 5 years ago.
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