Dr. John D. Clark, MD
- Medicare services, 2024
- 15,870
- Medicare patients, 2024
- 551
- Part D claims, 2024
- 4,822
- Publications
- 2
- MIPS score, 2024
- 88
- Practice address
- 1340 S 18th St, Fernandina Beach, FL 32034
- Practice phone
- Call (904) 376-3707
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Baptist Neurology Inc
Fernandina Beach, Florida
Find Dr. Clark'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. John D. Clark is a neurologist in Fernandina Beach, Florida
Dr. Clark practices at Baptist Neurology Inc in Fernandina Beach, Florida.
Dr. Clark's NPI, 1235166943, was assigned on June 27, 2006. Dr. Clark graduated from University of Oklahoma College of Medicine in 1990. Dr. Clark holds Florida license ME169258.
- NPI
- 1235166943NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860468469
- NPI enumeration date
- June 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (904) 376-3707
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John D. Clark practices at Baptist Neurology Inc in Fernandina Beach, Florida
Dr. Clark's primary practice is Baptist Neurology Inc, at 1340 S 18th St, Fernandina Beach, FL 32034 in Nassau County. The practice phone is (904) 376-3707.
- Baptist Neurology Inc1340 S 18th St, Fernandina Beach, FL 32034 · Nassau CountyPhone(904) 376-3707
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John D. Clark is affiliated with 5 sites of care and 1 medical group
Dr. Clark's primary practice is Baptist Neurology Inc in Fernandina Beach, Florida. Dr. Clark is also affiliated with Baptist Medical Center Nassau. The medical group on file is Baptist Neurology. Dmand AI also links Dr. Clark to 2 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John D. Clark's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Baptist Neurology Inc | Available with a free account |
| +4 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.
Dr. John D. Clark is one of 1,297 neurologists in Florida
Neurology is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dmand AI has Dr. Clark's licenses on file in 2 states: Florida and Kansas.
Specialties and state licenses
- Neurology, FloridaPrimary
- Kansas license
Neurologists near Dr. Clark
Counts of neurologists 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. John D. Clark billed Medicare for 15,870 services in 2024
CMS data shows 15,870 Medicare services from Dr. Clark across 14 procedure codes in 2024, for 551 Medicare patients. Medicare paid $150,300 for them.
Dr. Clark's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 27,3052024: 15,00045%
- Office and hospital visits
- 2023: 9822024: 68630%
- Tests and treatments
- 2023: 2522024: 14144%
- Surgery
- 2023: 772024: 4344%
Where Dr. Clark's Medicare services took place, 2024
- In an office15,76899%
- In a facility1021%
Dr. Clark compared with the Florida median for neurologists, 2024
- Dr. Clark
- Florida median
- Medicare services
- 15,870vs 47933.1 times
- Medicare patients
- 551vs 2372.3 times
- Part D claims
- 4,564vs 41511.0 times
Medians across 1,209 neurologists in Florida with Dmand AI profiles that report each measure.
Dr. Clark'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.
Need commercial claims for Dr. Clark?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Clark and other neurologists in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John D. Clark treated 551 Medicare patients in 2024, average age 74
CMS counts 551 Medicare patients who saw Dr. Clark in 2024. The largest group is 75 to 84, with 200 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 7% are also on Medicaid. Their average risk score is 1.33, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Clark's median patient age at 75, with 57% women.
Dr. Clark's Medicare patients by age, 2024
Dr. Clark's Medicare patients by sex, 2024
- Women30455%
- Men24745%
Chronic conditions among Dr. Clark's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis53%
- Mood disorders41%
- Depression37%
- Anxiety32%
- Ischemic heart disease29%
- Diabetes25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Clark's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
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. John D. Clark wrote 4,822 Medicare Part D claims in 2024
In 2024, Dr. Clark wrote 4,822 Medicare Part D claims for 602 patients. 92% of them were for generic drugs. CMS names the drug for 4,564 of them, across 71 drugs with 11 or more claims each, at $595,057 in total drug cost. In 2023, CMS named 5,025 claims across 81 drugs.
Dr. Clark's Part D claims by kind of drug, 2024
- Generic4,454 claims92%
- Brand-name353 claims7%
- Other15 claims0%
Dr. Clark'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. Clark's Part D claims, 2024
- Opioids2%101 of 4,822 claims
- Antipsychotics, patients 65 and over1%40 of 4,822 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: 5,0252024: 4,5649%
Drugs named by CMS: 71 in 2024, 81 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. John D. Clark scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Clark for performance year 2024, reported as part of a group. Dr. Clark accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Clark's MIPS scores, performance year 2024
- 88of 100Final score
- 75.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 80of 100Cost
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
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.
Dr. John D. Clark has 2 publications on record
Dmand AI links 2 papers to Dr. Clark, published from 2020 to 2021.
Recent publications by Dr. Clark
See who Dr. Clark researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Clark works with, so you can find a warm path to the right neurologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John D. Clark received $237,946 in industry payments from 2016 to 2025
CMS Open Payments shows 421 general payments to Dr. Clark from 20 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 82% of the total. Biogen, Inc. paid the most, $65,579.
General payments to Dr. Clark by program year, 2016 to 2025
General payments to Dr. Clark by kind, 2016 to 2025
- Speaker and faculty fees$195,42382%
- Consulting fees$21,3209%
- Travel and lodging$13,7156%
- Food and beverage$7,1783%
- Education$3100%
Companies that paid Dr. Clark the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John D. Clark graduated from University of Oklahoma College of Medicine
Dr. Clark graduated from University of Oklahoma College of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John D. Clark'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 | 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (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
Frequently asked questions about Dr. John D. Clark
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. John D. Clark's NPI number?
Dr. John D. Clark's NPI number is 1235166943. It was assigned on June 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John D. Clark?
Dr. John D. Clark is a neurologist in Fernandina Beach, Florida. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. John D. Clark practice?
Dr. Clark practices at 1340 S 18th St, Fernandina Beach, FL 32034. Dr. Clark's primary practice is Baptist Neurology Inc in Fernandina Beach, Florida. Dmand AI also links Dr. Clark to 2 hospitals and 1 group practice or clinic.
What is Dr. John D. Clark's office phone number?
The practice phone on file for Dr. Clark is (904) 376-3707.
What is Dr. John D. Clark's medical license number?
Dr. Clark holds Florida license ME169258, one of the licenses on file in 2 states.
Which states has Dr. John D. Clark been licensed in?
Dmand AI has state licenses on file for Dr. Clark in Florida and Kansas.
Which hospitals is Dr. John D. Clark affiliated with?
Dr. Clark is affiliated with Baptist Medical Center Nassau. Dmand AI links Dr. Clark to 2 more hospitals.
What medical group is Dr. John D. Clark part of?
Dr. Clark is linked to Baptist Neurology.
Does Dr. John D. Clark accept Medicare?
Yes. CMS data shows Dr. Clark billed Medicare for 15,870 services in 2024, and Dr. Clark accepts Medicare assignment.
What is Dr. John D. Clark's MIPS score?
Dr. Clark's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. John D. Clark see?
CMS counts 551 Medicare patients who saw Dr. Clark in 2024, with an average age of 74.
What services does Dr. John D. Clark bill to Medicare?
In 2024, Dr. Clark's most billed Medicare services were injected or infused drug (J0585), office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. John D. Clark go to medical school?
Dr. Clark graduated from University of Oklahoma College of Medicine in 1990.
What drugs does Dr. John D. Clark prescribe most?
In 2024 Medicare Part D data, Dr. Clark's most prescribed drugs by claims were Levetiracetam, Gabapentin and Carbidopa-Levodopa.
Has Dr. John D. Clark received payments from drug or device companies?
CMS Open Payments shows $237,946 in general payments to Dr. Clark from 20 companies from 2016 to 2025. The largest total came from Biogen, Inc.
How long has Dr. John D. Clark been practicing?
Dr. Clark graduated from medical school in 1990, 36 years ago.
Does Dr. John D. Clark do research?
Dmand AI links 2 publications to Dr. Clark, published from 2020 to 2021.
Selling to neurology practices?
See neurologists in Florida by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card