Dr. Mark A. Simaga, MD
- Medicare services, 2024
- 1,380
- Medicare patients, 2024
- 424
- Part D claims, 2024
- 4,768
- Hospital affiliations
- 4
- Industry payments
- $15,688
- Practice address
- 9660 Wicker Ave, Saint John, IN 46373
- Practice phone
- Call (219) 365-7620
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Powers Health Medical Group
Saint John, Indiana
Find Dr. Simaga'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. Mark A. Simaga is a neurologist in Saint John, Indiana
Dr. Simaga practices at Powers Health Medical Group in Saint John, Indiana.
Dr. Simaga's NPI, 1598818270, was assigned on January 18, 2007. Dr. Simaga graduated from Rush Medical College of Rush University in 1986. Dr. Simaga holds Indiana license 01046578.
- NPI
- 1598818270NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901094069
- NPI enumeration date
- January 18, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (219) 365-7620
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark A. Simaga practices at Powers Health Medical Group in Saint John, Indiana
Dr. Simaga's primary practice is Powers Health Medical Group, at 9660 Wicker Ave, Saint John, IN 46373 in Lake County. The practice phone is (219) 365-7620.
- Powers Health Medical Group9660 Wicker Ave, Saint John, IN 46373 · Lake CountyPhone(219) 365-7620
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark A. Simaga is affiliated with 7 sites of care and 1 medical group
Dr. Simaga's primary practice is Powers Health Medical Group in Saint John, Indiana. Dr. Simaga is also affiliated with Community Hospital. The medical group on file is Powers Health Medical Group. Dmand AI also links Dr. Simaga to 3 more hospitals, 1 group practice or clinic and 1 home health agency, 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. Mark A. Simaga's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simaga practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Powers Health Medical Group | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark A. Simaga is one of 338 neurologists in Indiana
Neurology is Dr. Simaga's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Simaga is licensed in Indiana.
Specialties and state licenses
- Neurology, IndianaPrimary
Neurologists near Dr. Simaga
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. Mark A. Simaga billed Medicare for 1,380 services in 2024
CMS data shows 1,380 Medicare services from Dr. Simaga across 10 procedure codes in 2024, for 424 Medicare patients. Medicare paid $102,892 for them.
Dr. Simaga's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,7142024: 1,34921%
- Tests and treatments
- 2023: 232024: 2013%
- Other services
- 2023: 02024: 11
Where Dr. Simaga's Medicare services took place, 2024
- In an office51137%
- In a facility86963%
Dr. Simaga compared with the Indiana median for neurologists, 2024
- Dr. Simaga
- Indiana median
- Medicare services
- 1,380vs 3923.5 times
- Medicare patients
- 424vs 25566% above
- Part D claims
- 4,241vs 7066.0 times
Medians across 335 neurologists in Indiana with Dmand AI profiles that report each measure.
Dr. Simaga'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. Simaga?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Simaga and other neurologists in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark A. Simaga treated 424 Medicare patients in 2024, average age 75
CMS counts 424 Medicare patients who saw Dr. Simaga in 2024. The largest group is 75 to 84, with 155 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.05, 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. Simaga's median patient age at 73, with 55% women.
Dr. Simaga's Medicare patients by age, 2024
Dr. Simaga's Medicare patients by sex, 2024
- Women23956%
- Men18544%
Chronic conditions among Dr. Simaga's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Stroke or TIA52%
- Ischemic heart disease43%
- Anxiety40%
- Chronic kidney disease40%
- Diabetes40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Simaga's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark A. Simaga wrote 4,768 Medicare Part D claims in 2024
In 2024, Dr. Simaga wrote 4,768 Medicare Part D claims for 447 patients. 87% of them were for generic drugs. CMS names the drug for 4,241 of them, across 84 drugs with 11 or more claims each, at $1,124,281 in total drug cost. In 2023, CMS named 3,728 claims across 82 drugs.
Dr. Simaga's Part D claims by kind of drug, 2024
- Generic4,171 claims87%
- Brand-name578 claims12%
- Other19 claims0%
Dr. Simaga'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. Simaga's Part D claims, 2024
- Opioids9%451 of 4,768 claims
- Antipsychotics, patients 65 and over1%26 of 4,768 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: 3,7282024: 4,24114%
Drugs named by CMS: 84 in 2024, 82 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. Mark A. Simaga takes part in Medicare
Dr. Simaga 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. Mark A. Simaga received $15,688 in industry payments from 2016 to 2025
CMS Open Payments shows 809 general payments to Dr. Simaga from 67 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Novartis Pharmaceuticals Corporation paid the most, $1,835.
General payments to Dr. Simaga by program year, 2016 to 2025
General payments to Dr. Simaga by kind, 2016 to 2025
- Food and beverage$15,21997%
- Education$4443%
- Speaker and faculty fees$250%
Companies that paid Dr. Simaga 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. Mark A. Simaga graduated from Rush Medical College of Rush University
Dr. Simaga graduated from Rush Medical College of Rush University in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark A. Simaga'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) |
| 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. Mark A. Simaga
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. Mark A. Simaga's NPI number?
Dr. Mark A. Simaga's NPI number is 1598818270. It was assigned on January 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark A. Simaga?
Dr. Mark A. Simaga is a neurologist in Saint John, Indiana. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Mark A. Simaga practice?
Dr. Simaga practices at 9660 Wicker Ave, Saint John, IN 46373. Dr. Simaga's primary practice is Powers Health Medical Group in Saint John, Indiana. Dmand AI also links Dr. Simaga to 3 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Mark A. Simaga's office phone number?
The practice phone on file for Dr. Simaga is (219) 365-7620.
What is Dr. Mark A. Simaga's medical license number?
Dr. Simaga holds Indiana license 01046578.
Which hospitals is Dr. Mark A. Simaga affiliated with?
Dr. Simaga is affiliated with Community Hospital. Dmand AI links Dr. Simaga to 3 more hospitals.
What medical group is Dr. Mark A. Simaga part of?
Dr. Simaga is linked to Powers Health Medical Group.
Does Dr. Mark A. Simaga accept Medicare?
Yes. CMS data shows Dr. Simaga billed Medicare for 1,380 services in 2024, and Dr. Simaga accepts Medicare assignment.
How many Medicare patients does Dr. Mark A. Simaga see?
CMS counts 424 Medicare patients who saw Dr. Simaga in 2024, with an average age of 75.
What services does Dr. Mark A. Simaga bill to Medicare?
In 2024, Dr. Simaga's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99233) and hospital inpatient care (99232).
Show 4 more questionsShow fewer questions
Where did Dr. Mark A. Simaga go to medical school?
Dr. Simaga graduated from Rush Medical College of Rush University in 1986.
What drugs does Dr. Mark A. Simaga prescribe most?
In 2024 Medicare Part D data, Dr. Simaga's most prescribed drugs by claims were Gabapentin, Hydrocodone-Acetaminophen and Clopidogrel.
Has Dr. Mark A. Simaga received payments from drug or device companies?
CMS Open Payments shows $15,688 in general payments to Dr. Simaga from 67 companies from 2016 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Mark A. Simaga been practicing?
Dr. Simaga graduated from medical school in 1986, 40 years ago.
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