Dr. Gregory Michael Johnston, MD
- Medicare services, 2016
- 666
- Part D claims, 2016
- 62
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 2213 Cherry St, Toledo, OH 43608
- Practice phone
- Call (253) 968-1390
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Medical group
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Dr. Gregory Michael Johnston is a general practice physician in Toledo, Ohio
Dr. Johnston practices with Williamsburg Emergency Physicians, a medical group.
Dr. Johnston's NPI, 1043282023, was assigned on February 3, 2006. Dr. Johnston holds Virginia license 0101235436.
- NPI
- 1043282023NPI Registry (opens in a new tab)
- NPI enumeration date
- February 3, 2006
- NPI status
- Active
- Practice phone
- (253) 968-1390
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Gregory Michael Johnston's practice address is in Toledo, Ohio
Dr. Johnston's practice address in the NPI Registry is 2213 Cherry St, Toledo, OH 43608, in Lucas County. The practice phone is (253) 968-1390.
- NPI Registry address2213 Cherry St, Toledo, OH 43608 · Lucas CountyPhone(253) 968-1390
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory Michael Johnston is affiliated with 1 medical group
Dr. Johnston is part of Williamsburg Emergency Physicians, a medical group in Williamsburg, Virginia.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory Michael Johnston's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnston practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Williamsburg Emergency Physicians | 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 Williamsburg Emergency Physicians and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gregory Michael Johnston is one of 193 general practice physicians in Ohio
General practice is Dr. Johnston's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Johnston is licensed in Virginia.
Specialties and state licenses
- General practice, VirginiaPrimary
General practice physicians near Dr. Johnston
Counts of general practice 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. Gregory Michael Johnston billed Medicare for 666 services in 2016
CMS data shows 666 Medicare services from Dr. Johnston across 5 procedure codes in 2016. Medicare paid $56,768 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Johnston's Medicare services by type, 2016
- Office and hospital visits440
- Tests and treatments226
Dr. Johnston compared with the Ohio median for general practice physicians, 2016
- Dr. Johnston
- Ohio median
- Medicare services
- 666vs 1664.0 times
- Part D claims
- 62vs 11847% below
Medians across 172 general practice physicians in Ohio with Dmand AI profiles that report each measure.
Dr. Johnston's 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.
Need commercial claims for Dr. Johnston?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johnston and other general practice physicians in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Michael Johnston's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Johnston's median patient age at 56, with 43% women.
Dr. Johnston's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women43%
- Men57%
Source: Dmand AI Patient Panel Data
Dr. Gregory Michael Johnston wrote 62 Medicare Part D claims in 2016
In 2016, Dr. Johnston wrote 62 Medicare Part D claims. They cover 3 drugs, with $319 in total drug cost.
Dr. Johnston's 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
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.
Sources for Dr. Gregory Michael Johnston'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 | Dmand 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. Gregory Michael Johnston
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. Gregory Michael Johnston's NPI number?
Dr. Gregory Michael Johnston's NPI number is 1043282023. It was assigned on February 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Michael Johnston?
Dr. Gregory Michael Johnston is a general practice physician in Toledo, Ohio. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Gregory Michael Johnston practice?
Dr. Johnston practices at 2213 Cherry St, Toledo, OH 43608. Dr. Johnston's primary practice is Williamsburg Emergency Physicians, a medical group.
What is Dr. Gregory Michael Johnston's office phone number?
The practice phone on file for Dr. Johnston is (253) 968-1390.
What is Dr. Gregory Michael Johnston's medical license number?
Dr. Johnston holds Virginia license 0101235436.
What medical group is Dr. Gregory Michael Johnston part of?
Dr. Johnston is part of Williamsburg Emergency Physicians in Williamsburg, Virginia.
Does Dr. Gregory Michael Johnston accept Medicare?
Yes. CMS data shows Dr. Johnston billed Medicare for 666 services in 2016.
What services does Dr. Gregory Michael Johnston bill to Medicare?
In 2016, Dr. Johnston's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
What drugs does Dr. Gregory Michael Johnston prescribe most?
In 2016 Medicare Part D data, Dr. Johnston's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Prednisone and Cephalexin.
How long has Dr. Gregory Michael Johnston been practicing?
Dr. Johnston's NPI was assigned in 2006.
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