Dr. Harold Mars, MD
- Medicare services, 2020
- 108
- Part D claims, 2020
- 1,509
- Industry payments
- $8,385
- Affiliated sites
- 2
- State license
- 1
- Practice address
- 3609 Park East Dr Suite 517 Suite 517, Beachwood, OH 44122
- Practice phone
- Call (216) 831-6085
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Harold Mars, MD
Physician office · Beachwood, Ohio
Find Dr. Mars' 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. Harold Mars is a neurologist in Warren, Ohio
Dr. Mars practices at Harold Mars, MD in Beachwood, Ohio.
Dr. Mars' NPI, 1003900812, was assigned on October 3, 2006. Dr. Mars holds Ohio license 35 032974.
- NPI
- 1003900812NPI Registry (opens in a new tab)
- NPI enumeration date
- October 3, 2006
- NPI status
- Active
- Practice phone
- (216) 831-6085
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Harold Mars practices in Beachwood and Warren
Dr. Mars' primary practice is Harold Mars, MD, at 3609 Park East Dr Suite 517 Suite 517, Beachwood, OH 44122. The practice phone is (216) 831-6085. The NPI Registry lists Dr. Mars' practice address as 1350 E Market St, Warren, OH 44483.
- Harold Mars, MDPrimary3609 Park East Dr Suite 517 Suite 517, Beachwood, OH 44122Phone(216) 831-6085
- NPI Registry address1350 E Market St, Warren, OH 44483 · Trumbull CountyPhone(216) 831-6085
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Harold Mars is affiliated with 2 sites of care
Dr. Mars' primary practice is Harold Mars, MD in Beachwood, Ohio. Dmand AI also links Dr. Mars to 1 physician office, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Harold Mars' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mars practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Harold Mars, MD | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Harold Mars is one of 738 neurologists in Ohio
Neurology is Dr. Mars' primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Mars is licensed in Ohio.
Specialties and state licenses
- Neurology, OhioPrimary
Neurologists near Dr. Mars
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. Harold Mars billed Medicare for 108 services in 2020
CMS data shows 108 Medicare services from Dr. Mars across 4 procedure codes in 2020. Medicare paid $5,324 for them.
Dr. Mars' Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 1,0672020: 9591%
- Tests and treatments
- 2019: 2052020: 1394%
Where Dr. Mars' Medicare services took place, 2020
- In an office4441%
- In a facility6459%
Dr. Mars compared with the Ohio median for neurologists, 2020
- Dr. Mars
- Ohio median
- Medicare services
- 108vs 31566% below
- Part D claims
- 1,509vs 4093.7 times
Medians across 700 neurologists in Ohio with Dmand AI profiles that report each measure.
Dr. Mars' most billed Medicare procedure codes, 2020
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. Mars and other neurologists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Harold Mars' patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Mars' median patient age at 63, with 63% women.
Dr. Mars' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women63%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Harold Mars wrote 1,509 Medicare Part D claims in 2020
In 2020, Dr. Mars wrote 1,509 Medicare Part D claims. They cover 47 drugs, with $537,545 in total drug cost. In 2019, CMS named 2,564 claims across 62 drugs.
Dr. Mars' most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 2,5642020: 1,50941%
Drugs named by CMS: 47 in 2020, 62 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Harold Mars received $8,385 in industry payments from 2016 to 2020
CMS Open Payments shows 433 general payments to Dr. Mars from 32 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 74% of the total. Eisai Inc. paid the most, $2,025.
General payments to Dr. Mars by program year, 2016 to 2020
General payments to Dr. Mars by kind, 2016 to 2020
- Food and beverage$6,17074%
- Speaker and faculty fees$2,15326%
- Gifts$421%
- Education$190%
Companies that paid Dr. Mars the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Harold Mars'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 Affiliation DataDmand 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) |
| 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. Harold Mars
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. Harold Mars' NPI number?
Dr. Harold Mars' NPI number is 1003900812. It was assigned on October 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Harold Mars?
Dr. Harold Mars is a neurologist in Warren, Ohio. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Harold Mars practice?
Dr. Mars practices at 3609 Park East Dr Suite 517 Suite 517, Beachwood, OH 44122. Dr. Mars also practices at 1350 E Market St, Warren, OH 44483. Dr. Mars' primary practice is Harold Mars, MD in Beachwood, Ohio. Dmand AI also links Dr. Mars to 1 physician office.
What is Dr. Harold Mars' office phone number?
The practice phone on file for Dr. Mars is (216) 831-6085.
What is Dr. Harold Mars' medical license number?
Dr. Mars holds Ohio license 35 032974.
Does Dr. Harold Mars accept Medicare?
Yes. CMS data shows Dr. Mars billed Medicare for 108 services in 2020.
What services does Dr. Harold Mars bill to Medicare?
In 2020, Dr. Mars' most billed Medicare services were office visit, established patient (99213), hospital inpatient care (99232) and hospital inpatient care (99221).
What drugs does Dr. Harold Mars prescribe most?
In 2020 Medicare Part D data, Dr. Mars' most prescribed drugs by claims were Butalbital-Acetaminophen-Caffe, Memantine HCl and Gabapentin.
Has Dr. Harold Mars received payments from drug or device companies?
CMS Open Payments shows $8,385 in general payments to Dr. Mars from 32 companies from 2016 to 2020. The largest total came from Eisai Inc.
How long has Dr. Harold Mars been practicing?
Dr. Mars' NPI was assigned in 2006.
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