Dennis Michael Marien, PA
- Medicare patients, 2024
- 50
- Part D claims, 2024
- 1,403
- Industry payments
- $199
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 5445 Ali Dr, Grand Blanc, MI 48439
- Practice phone
- Call (810) 428-1181
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cognosis Health Hillside
Grand Blanc, Michigan
Find Dennis Marien'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.
Dennis Michael Marien is a physician assistant in Grand Blanc, Michigan
Dennis Marien practices at Cognosis Health Hillside in Grand Blanc, Michigan.
Dennis Marien's NPI, 1710029079, was assigned on February 13, 2007. Dennis Marien holds Michigan license 5601004895.
- NPI
- 1710029079NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224132493
- NPI enumeration date
- February 13, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (810) 428-1181
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dennis Michael Marien practices at Cognosis Health Hillside in Grand Blanc, Michigan
Dennis Marien's primary practice is Cognosis Health Hillside, at 5445 Ali Dr, Grand Blanc, MI 48439 in Genesee County. The practice phone is (810) 428-1181.
- Cognosis Health Hillside5445 Ali Dr, Grand Blanc, MI 48439 · Genesee CountyPhone(810) 428-1181
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dennis Michael Marien is affiliated with 2 sites of care and 1 medical group
Dennis Marien's primary practice is Cognosis Health Hillside in Grand Blanc, Michigan. The medical group on file is Cognosis Health. Dmand AI also links Dennis Marien to 1 more group practice or clinic, 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 Dennis Michael Marien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dennis Marien practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cognosis Health Hillside | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dennis Michael Marien is one of 5,857 physician assistants in Michigan
Physician assistant is Dennis Marien's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Dennis Marien is licensed in Michigan.
Specialties and state licenses
- Physician assistant, MichiganPrimary
Physician assistants near Dennis Marien
Counts of physician assistants 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
Dennis Michael Marien treated 50 Medicare patients in 2024, average age 67
CMS counts 50 Medicare patients who saw Dennis Marien in 2024. The largest group is 65 to 74, with 21 patients. 75% of them have anxiety, and 75% have mood disorders. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dennis Marien's median patient age at 46, with 66% women.
Dennis Marien's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dennis Marien's Medicare patients by sex, 2024
- Women3162%
- Men1938%
Chronic conditions among Dennis Marien's Medicare patients, 2024
- Anxiety75%
- Mood disorders75%
- High blood pressure72%
- Depression70%
- High cholesterol70%
- Arthritis48%
- Bipolar disorder40%
- Diabetes36%
Share of Medicare patients with each condition. A patient can have several.
Dennis Marien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women66%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dennis Michael Marien wrote 1,403 Medicare Part D claims in 2024
In 2024, Dennis Marien wrote 1,403 Medicare Part D claims for 206 patients. 99% of them were for generic drugs.
Dennis Marien's Part D claims by kind of drug, 2024
- Generic1,387 claims99%
- Brand-name16 claims1%
Drug classes CMS tracks in Dennis Marien's Part D claims, 2024
- Antipsychotics, patients 65 and over10%136 of 1,403 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dennis Michael Marien offers telehealth to Medicare patients
Dennis Marien accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dennis Marien as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dennis Michael Marien received $199 in industry payments in 2025
CMS Open Payments shows 4 general payments to Dennis Marien from 4 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $121.
Companies that paid Dennis Marien the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dennis Michael Marien'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 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 (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 Dennis Michael Marien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dennis Michael Marien's NPI number?
Dennis Michael Marien's NPI number is 1710029079. It was assigned on February 13, 2007, and it is active in the NPI Registry.
What does Dennis Michael Marien specialize in?
Dennis Michael Marien is a physician assistant in Grand Blanc, Michigan. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Dennis Michael Marien practice?
Dennis Marien practices at 5445 Ali Dr, Grand Blanc, MI 48439. Dennis Marien's primary practice is Cognosis Health Hillside in Grand Blanc, Michigan. Dmand AI also links Dennis Marien to 1 group practice or clinic.
What is Dennis Michael Marien's office phone number?
The practice phone on file for Dennis Marien is (810) 428-1181.
What is Dennis Michael Marien's medical license number?
Dennis Marien holds Michigan license 5601004895.
What medical group is Dennis Michael Marien part of?
Dennis Marien is linked to Cognosis Health.
Does Dennis Michael Marien accept Medicare?
Yes. CMS lists Dennis Marien as accepting Medicare assignment.
Does Dennis Michael Marien offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dennis Marien as offering telehealth services.
How many Medicare patients does Dennis Michael Marien see?
CMS counts 50 Medicare patients who saw Dennis Marien in 2024, with an average age of 67.
Has Dennis Michael Marien received payments from drug or device companies?
CMS Open Payments shows $199 in general payments to Dennis Marien from 4 companies from 2025 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dennis Michael Marien been practicing?
Dennis Marien graduated from medical school in 2006, 20 years ago.
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