Urinary Tract InfectionsUrologic DiseasesGepotidacinNitrofurantoin
Dr. James Matthew Diener, DO
NPI1588004915PAC ID6002135720
- Part D claims, 2024
- 10,860
- Clinical trials
- 1
- Hospital affiliations
- 5
- Industry payments
- $717
- Medical group
- 1
- Practice address
- 7985 Mackinaw Trail, Cadillac, MI 49601
- Practice phone
- Call (231) 876-6100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cadillac OB/GYN
Rural Health Clinic - Hospital-Owned · Cadillac, Michigan
Find Dr. Diener'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. James Matthew Diener is an internist in Cadillac, Michigan
Dr. Diener practices at Cadillac OB/GYN in Cadillac, Michigan.
Dr. Diener's NPI, 1588004915, was assigned on June 29, 2013. Dr. Diener graduated from Michigan State University College of Osteopathic Medicine in 2013. Dr. Diener holds Michigan license 5101020738.
NPI and contact details
- NPI
- 1588004915NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002135720
- NPI enumeration date
- June 29, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (231) 876-6100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Matthew Diener practices at Cadillac OB/GYN in Cadillac, Michigan
Dr. Diener's primary practice is Cadillac OB/GYN, at 7985 Mackinaw Trail, Cadillac, MI 49601. The practice phone is (231) 876-6100.
- Cadillac OB/GYN7985 Mackinaw Trail, Cadillac, MI 49601Phone(231) 876-6100
Source: Dmand AI Affiliation Data
Dr. James Matthew Diener is affiliated with 7 sites of care and 1 medical group
Dr. Diener's primary practice is Cadillac OB/GYN in Cadillac, Michigan. Dr. Diener is also affiliated with Munson Healthcare Cadillac Hospital. The medical group on file is Munson Healthcare Cadillac Hospital. Dmand AI also links Dr. Diener to 4 more hospitals and 1 home health agency, each named with a free account. Dr. Diener's employer is on file too: a rural health clinic (rhc).
Cadillac OB/GYNPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James Matthew Diener's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diener practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cadillac OB/GYN | 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. James Matthew Diener is one of 4,804 internists in Michigan
Internal medicine is Dr. Diener's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Diener is licensed in Michigan.
Specialties and state licenses
- Internal medicine, MichiganPrimary
Internists near Dr. Diener
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
4,804internists in Michigan
6internists in Cadillac
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. James Matthew Diener's patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Dr. Diener's median patient age at 74, with 52% women.
Dr. Diener's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women52%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. James Matthew Diener wrote 10,860 Medicare Part D claims in 2024
In 2024, Dr. Diener wrote 10,860 Medicare Part D claims for 569 patients. 85% of them were for generic drugs. CMS names the drug for 10,121 of them, across 160 drugs with 11 or more claims each, at $1,100,759 in total drug cost. In 2023, CMS named 9,920 claims across 169 drugs.
Part D claims, 202410,860
Drugs named by CMS160
Total drug cost$1.1M
Part D patients569
Dr. Diener's Part D claims by kind of drug, 2024
- Generic9,231 claims85%
- Brand-name1,529 claims14%
- Other100 claims1%
Dr. Diener'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. Diener's Part D claims, 2024
- Opioids3%314 of 10,860 claims
- Antibiotics2%232 of 10,860 claims
- Antipsychotics, patients 65 and over1%56 of 10,860 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: 9,9202024: 10,1212%
Drugs named by CMS: 160 in 2024, 169 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. James Matthew Diener takes part in Medicare
Dr. Diener 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. James Matthew Diener has worked on 1 clinical trial
Dmand AI links Dr. Diener to 1 clinical trial. Conditions studied include Urinary Tract Infections and Urologic Diseases.
Conditions in Dr. Diener's trials
- Urinary Tract Infections
- Urologic Diseases
Investigators on the most trials with Dr. Diener
Recent clinical trials with Dr. Diener
Sources: ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. James Matthew Diener received $717 in industry payments from 2016 to 2024
CMS Open Payments shows 24 general payments to Dr. Diener from 14 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $182.
General payments to Dr. Diener by program year, 2016 to 2024
Companies that paid Dr. Diener the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Matthew Diener graduated from Michigan State University College of Osteopathic Medicine
Dr. Diener graduated from Michigan State University College of Osteopathic Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James Matthew Diener'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 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)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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (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. James Matthew Diener
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. James Matthew Diener's NPI number?
Dr. James Matthew Diener's NPI number is 1588004915. It was assigned on June 29, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. James Matthew Diener?
Dr. James Matthew Diener is an internist in Cadillac, Michigan. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James Matthew Diener practice?
Dr. Diener practices at 7985 Mackinaw Trail, Cadillac, MI 49601. Dr. Diener's primary practice is Cadillac OB/GYN in Cadillac, Michigan. Dmand AI also links Dr. Diener to 4 hospitals and 1 home health agency.
What is Dr. James Matthew Diener's office phone number?
The practice phone on file for Dr. Diener is (231) 876-6100.
What is Dr. James Matthew Diener's medical license number?
Dr. Diener holds Michigan license 5101020738.
Which hospitals is Dr. James Matthew Diener affiliated with?
Dr. Diener is affiliated with Munson Healthcare Cadillac Hospital. Dmand AI links Dr. Diener to 4 more hospitals.
What medical group is Dr. James Matthew Diener part of?
Dr. Diener is linked to Munson Healthcare Cadillac Hospital.
Does Dr. James Matthew Diener accept Medicare?
Yes. CMS lists Dr. Diener as accepting Medicare assignment.
Where did Dr. James Matthew Diener go to medical school?
Dr. Diener graduated from Michigan State University College of Osteopathic Medicine in 2013.
What drugs does Dr. James Matthew Diener prescribe most?
In 2024 Medicare Part D data, Dr. Diener's most prescribed drugs by claims were Atorvastatin Calcium, Gabapentin and Lisinopril.
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Has Dr. James Matthew Diener received payments from drug or device companies?
CMS Open Payments shows $717 in general payments to Dr. Diener from 14 companies from 2016 to 2024. The largest total came from Amgen Inc.
How long has Dr. James Matthew Diener been practicing?
Dr. Diener graduated from medical school in 2013, 13 years ago.
Does Dr. James Matthew Diener do research?
Dr. Diener has worked on 1 clinical trial.
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