Dr. James Cooper Johnston, MD
- Medicare services, 2024
- 8,662
- Medicare patients, 2024
- 628
- Part D claims, 2024
- 83
- Hospital affiliations
- 1
- Industry payments
- $810
- Practice address
- 6701 North Charles Street, Baltimore, MD 21204
- Practice phone
- Call (443) 849-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Johnston's professional email, personal email and mobile number
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Dr. James Cooper Johnston is an orthopedic surgeon in Towson, Maryland
Dr. Johnston practices at Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
Dr. Johnston's NPI, 1508902024, was assigned on January 30, 2007. Dr. Johnston graduated from University of Maryland School of Medicine in 2002. Dr. Johnston holds Minnesota license 54459.
- NPI
- 1508902024NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486825049
- NPI enumeration date
- January 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (443) 849-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Cooper Johnston practices at Greater Baltimore Medical Center in Baltimore, Maryland
Dr. Johnston's primary practice is Greater Baltimore Medical Center, at 6701 North Charles Street, Baltimore, MD 21204 in Baltimore County. The practice phone is (443) 849-2000.
- Greater Baltimore Medical Center6701 North Charles Street, Baltimore, MD 21204 · Baltimore CountyPhone(443) 849-2000
Source: Dmand AI Affiliation Data
Dr. James Cooper Johnston is affiliated with 5 sites of care and 3 medical groups
Dr. Johnston's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. The medical group on file is Agape Physical Therapy. Dmand AI also links Dr. Johnston to 3 more home health agencies, 2 medical groups and 1 therapy and rehab clinic, 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. James Cooper Johnston's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnston practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Baltimore Medical Center | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Cooper Johnston is one of 404 orthopedic surgeons in Maryland
Orthopaedic surgery is Dr. Johnston's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Johnston's licenses on file in 2 states: Minnesota and Maryland.
Specialties and state licenses
- Orthopaedic surgery, MinnesotaPrimary
- Maryland license
Orthopedic surgeons near Dr. Johnston
Counts of orthopedic surgeons 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. James Cooper Johnston billed Medicare for 8,662 services in 2024
CMS data shows 8,662 Medicare services from Dr. Johnston across 18 procedure codes in 2024, for 628 Medicare patients. Medicare paid $176,366 for them.
Dr. Johnston's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1902024: 7,0213595%
- Office and hospital visits
- 2023: 6342024: 69710%
- Imaging
- 2023: 5652024: 63212%
- Surgery
- 2023: 2962024: 3125%
Where Dr. Johnston's Medicare services took place, 2024
- In an office8,53799%
- In a facility1251%
Dr. Johnston compared with the Maryland median for orthopedic surgeons, 2024
- Dr. Johnston
- Maryland median
- Medicare services
- 8,662vs 1,3436.4 times
- Medicare patients
- 628vs 34383% above
- Part D claims
- 61vs 9032% below
Medians across 368 orthopedic surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Johnston'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johnston and other orthopedic surgeons in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Cooper Johnston treated 628 Medicare patients in 2024, average age 76
CMS counts 628 Medicare patients who saw Dr. Johnston in 2024. The largest group is 75 to 84, with 264 patients. 75% of them have arthritis, and 75% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.03, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Johnston's median patient age at 72, with 66% women.
Dr. Johnston's Medicare patients by age, 2024
Dr. Johnston's Medicare patients by sex, 2024
- Women43569%
- Men19331%
Chronic conditions among Dr. Johnston's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders29%
- Anxiety27%
- Depression25%
- Osteoporosis24%
- Ischemic heart disease23%
Share of Medicare patients with each condition. A patient can have several.
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 72
Patient panel by sex, all payers
- Women66%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Cooper Johnston wrote 83 Medicare Part D claims in 2024
In 2024, Dr. Johnston wrote 83 Medicare Part D claims for 48 patients. 99% of them were for generic drugs. CMS names the drug for 61 of them, across 4 drugs with 11 or more claims each, at $630 in total drug cost. In 2023, CMS named 66 claims across 3 drugs.
Dr. Johnston's Part D claims by kind of drug, 2024
- Generic82 claims99%
- Brand-name and other1 claims1%
Dr. Johnston'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. Johnston's Part D claims, 2024
- Antibiotics25%21 of 83 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: 662024: 618%
Drugs named by CMS: 4 in 2024, 3 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. James Cooper Johnston ranks in the 91st percentile for hip replacement in Medicare
Dr. Johnston accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 63 procedures of hip replacement by Dr. Johnston, more than 91% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Johnston ranks in Medicare procedure volume
- Hip replacement
- 91st percentile63 procedures
- Knee replacement
- 84th percentile62 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. James Cooper Johnston received $810 in industry payments from 2017 to 2023
CMS Open Payments shows 17 general payments to Dr. Johnston from 8 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $235.
General payments to Dr. Johnston by program year, 2017 to 2023
Companies that paid Dr. Johnston the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Cooper Johnston graduated from University of Maryland School of Medicine
Dr. Johnston graduated from University of Maryland School of Medicine in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James Cooper 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 | 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| 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
Frequently asked questions about Dr. James Cooper 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. James Cooper Johnston's NPI number?
Dr. James Cooper Johnston's NPI number is 1508902024. It was assigned on January 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. James Cooper Johnston?
Dr. James Cooper Johnston is an orthopedic surgeon in Towson, Maryland. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. James Cooper Johnston practice?
Dr. Johnston practices at 6701 North Charles Street, Baltimore, MD 21204. Dr. Johnston's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. Dmand AI also links Dr. Johnston to 3 home health agencies, 2 medical groups and 1 therapy and rehab clinic.
What is Dr. James Cooper Johnston's office phone number?
The practice phone on file for Dr. Johnston is (443) 849-2000.
What is Dr. James Cooper Johnston's medical license number?
Dr. Johnston holds Minnesota license 54459, one of the licenses on file in 2 states.
Which states has Dr. James Cooper Johnston been licensed in?
Dmand AI has state licenses on file for Dr. Johnston in Minnesota and Maryland.
Which hospitals is Dr. James Cooper Johnston affiliated with?
Dr. Johnston practices at Greater Baltimore Medical Center in Baltimore, Maryland.
What medical group is Dr. James Cooper Johnston part of?
Dr. Johnston is linked to Agape Physical Therapy. Dmand AI links Dr. Johnston to 2 more medical groups.
Does Dr. James Cooper Johnston accept Medicare?
Yes. CMS data shows Dr. Johnston billed Medicare for 8,662 services in 2024, and Dr. Johnston accepts Medicare assignment.
How many Medicare patients does Dr. James Cooper Johnston see?
CMS counts 628 Medicare patients who saw Dr. Johnston in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. James Cooper Johnston bill to Medicare?
In 2024, Dr. Johnston's most billed Medicare services were injected or infused drug (J1010), diagnostic imaging (73502) and office visit, established patient (99213).
Where did Dr. James Cooper Johnston go to medical school?
Dr. Johnston graduated from University of Maryland School of Medicine in 2002.
What drugs does Dr. James Cooper Johnston prescribe most?
In 2024 Medicare Part D data, Dr. Johnston's most prescribed drugs by claims were Meloxicam, Amoxicillin and Celecoxib.
Has Dr. James Cooper Johnston received payments from drug or device companies?
CMS Open Payments shows $810 in general payments to Dr. Johnston from 8 companies from 2017 to 2023. The largest total came from Stryker Corporation.
How long has Dr. James Cooper Johnston been practicing?
Dr. Johnston graduated from medical school in 2002, 24 years ago.
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