Dr. Jonathan David Gardner, MD
- Medicare services, 2024
- 5,653
- Medicare patients, 2024
- 2,336
- Part D claims, 2024
- 2,339
- Hospital affiliations
- 3
- Industry payments
- $5,147
- Practice address
- 9000 Franklin Square Drive, Rosedale, MD 21237
- Practice phone
- Call (443) 777-7850
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gardner's professional email, personal email and mobile number
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Dr. Jonathan David Gardner is a cardiologist in Rosedale, Maryland
Dr. Gardner practices at MedStar Franklin Square Medical Center in Rosedale, Maryland, part of MedStar Health.
Dr. Gardner's NPI, 1639490840, was assigned on June 22, 2010. Dr. Gardner holds Maryland license D0088104.
- NPI
- 1639490840NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678713260
- NPI enumeration date
- June 22, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (443) 777-7850
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan David Gardner practices at MedStar Franklin Square Medical Center in Rosedale, Maryland
Dr. Gardner's primary practice is MedStar Franklin Square Medical Center, at 9000 Franklin Square Drive, Rosedale, MD 21237 in Baltimore County. The practice phone is (443) 777-7850.
- MedStar Franklin Square Medical Center9000 Franklin Square Drive, Rosedale, MD 21237 · Baltimore CountyPhone(443) 777-7850
Source: Dmand AI Affiliation Data
Dr. Jonathan David Gardner is affiliated with 4 sites of care and 6 medical groups
Dr. Gardner's primary practice is MedStar Franklin Square Medical Center in Rosedale, Maryland, part of MedStar Health. Dr. Gardner is also affiliated with MedStar Good Samaritan Hospital. The medical group on file is MedStar Medical Group. Dmand AI also links Dr. Gardner to 1 more hospital, 5 medical groups and 1 group practice or 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. Jonathan David Gardner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gardner practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MedStar Franklin Square Medical Center | 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. Jonathan David Gardner is one of 503 cardiologists in Maryland
Cardiovascular disease is Dr. Gardner's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Gardner is licensed in Maryland.
Specialties and state licenses
- Cardiovascular disease, MarylandPrimary
Cardiologists near Dr. Gardner
Counts of cardiologists 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. Jonathan David Gardner billed Medicare for 5,653 services in 2024
CMS data shows 5,653 Medicare services from Dr. Gardner across 34 procedure codes in 2024, for 2,336 Medicare patients. Medicare paid $264,383 for them.
Dr. Gardner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 2,1252024: 3,51866%
- Office and hospital visits
- 2023: 1,1982024: 1,2444%
- Other services
- 2023: 1072024: 517383%
- Drugs given in the office
- 2023: 3252024: 27615%
- Imaging
- 2023: 952024: 983%
Where Dr. Gardner's Medicare services took place, 2024
- In an office2,40943%
- In a facility3,24457%
Dr. Gardner compared with the Maryland median for cardiologists, 2024
- Dr. Gardner
- Maryland median
- Medicare services
- 5,653vs 2,5872.2 times
- Medicare patients
- 2,336vs 1,1522.0 times
- Part D claims
- 2,149vs 1,19879% above
Medians across 496 cardiologists in Maryland with Dmand AI profiles that report each measure.
Dr. Gardner'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. Jonathan David Gardner treated 2,336 Medicare patients in 2024, average age 74
CMS counts 2,336 Medicare patients who saw Dr. Gardner in 2024. The largest group is 65 to 74, with 882 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 2.09, 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. Gardner's median patient age at 65, with 52% women.
Dr. Gardner's Medicare patients by age, 2024
Dr. Gardner's Medicare patients by sex, 2024
- Women1,29756%
- Men1,03944%
Chronic conditions among Dr. Gardner's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease58%
- Arthritis54%
- Diabetes46%
- Heart failure44%
- Mood disorders44%
- Chronic kidney disease43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gardner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan David Gardner wrote 2,339 Medicare Part D claims in 2024
In 2024, Dr. Gardner wrote 2,339 Medicare Part D claims for 651 patients. 82% of them were for generic drugs. CMS names the drug for 2,149 of them, across 28 drugs with 11 or more claims each, at $468,443 in total drug cost. In 2023, CMS named 3,060 claims across 37 drugs.
Dr. Gardner's Part D claims by kind of drug, 2024
- Generic1,912 claims82%
- Brand-name427 claims18%
Dr. Gardner'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,0602024: 2,14930%
Drugs named by CMS: 28 in 2024, 37 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. Jonathan David Gardner takes part in Medicare
Dr. Gardner 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. Jonathan David Gardner received $5,147 in industry payments from 2016 to 2025
CMS Open Payments shows 92 general payments to Dr. Gardner from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 49% of the total. Abbott Laboratories paid the most, $3,951.
General payments to Dr. Gardner by program year, 2016 to 2025
General payments to Dr. Gardner by kind, 2016 to 2025
- Food and beverage$2,54649%
- Travel and lodging$2,43147%
- Education$1713%
Companies that paid Dr. Gardner the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jonathan David Gardner'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) |
| Industry payments | Open Payments (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. Jonathan David Gardner
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. Jonathan David Gardner's NPI number?
Dr. Jonathan David Gardner's NPI number is 1639490840. It was assigned on June 22, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan David Gardner?
Dr. Jonathan David Gardner is a cardiologist in Rosedale, Maryland. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Jonathan David Gardner practice?
Dr. Gardner practices at 9000 Franklin Square Drive, Rosedale, MD 21237. Dr. Gardner's primary practice is MedStar Franklin Square Medical Center in Rosedale, Maryland, part of MedStar Health. Dmand AI also links Dr. Gardner to 1 hospital, 5 medical groups and 1 group practice or clinic.
What is Dr. Jonathan David Gardner's office phone number?
The practice phone on file for Dr. Gardner is (443) 777-7850.
What is Dr. Jonathan David Gardner's medical license number?
Dr. Gardner holds Maryland license D0088104.
Which hospitals is Dr. Jonathan David Gardner affiliated with?
Dr. Gardner practices at MedStar Franklin Square Medical Center in Rosedale, Maryland. Dr. Gardner is also affiliated with MedStar Good Samaritan Hospital. Dmand AI links Dr. Gardner to 1 more hospital.
What medical group is Dr. Jonathan David Gardner part of?
Dr. Gardner is linked to MedStar Medical Group. Dmand AI links Dr. Gardner to 5 more medical groups.
Does Dr. Jonathan David Gardner accept Medicare?
Yes. CMS data shows Dr. Gardner billed Medicare for 5,653 services in 2024, and Dr. Gardner accepts Medicare assignment.
How many Medicare patients does Dr. Jonathan David Gardner see?
CMS counts 2,336 Medicare patients who saw Dr. Gardner in 2024, with an average age of 74.
What services does Dr. Jonathan David Gardner bill to Medicare?
In 2024, Dr. Gardner's most billed Medicare services were heart test or procedure (93010), heart test or procedure (93000) and heart test or procedure (93306).
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What drugs does Dr. Jonathan David Gardner prescribe most?
In 2024 Medicare Part D data, Dr. Gardner's most prescribed drugs by claims were Atorvastatin Calcium, Metoprolol Succinate and Eliquis.
Has Dr. Jonathan David Gardner received payments from drug or device companies?
CMS Open Payments shows $5,147 in general payments to Dr. Gardner from 16 companies from 2016 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Jonathan David Gardner been practicing?
Dr. Gardner graduated from medical school in 2010, 16 years ago.
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