Dr. Gregory Alan Flermoen, MD
- Medicare services, 2024
- 89
- Medicare patients, 2024
- 111
- Part D claims, 2024
- 164
- Hospital affiliations
- 2
- Industry payments
- $7,409
- Practice address
- 1234 Napier Avenue, Saint Joseph, MI 49085
- Practice phone
- Call (269) 983-8300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Flermoen'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. Gregory Alan Flermoen is a general surgeon in Saint Joseph, Michigan
Dr. Flermoen practices at Corewell Health Lakeland Hospitals - Saint Joseph Hospital in Saint Joseph, Michigan, part of Corewell Health.
Dr. Flermoen's NPI, 1508178682, was assigned on July 6, 2010. Dr. Flermoen graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2010. Dr. Flermoen holds Michigan license 4301096517.
- NPI
- 1508178682NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810126372
- NPI enumeration date
- July 6, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (269) 983-8300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Alan Flermoen practices at Corewell Health Lakeland Hospitals - Saint Joseph Hospital in Saint Joseph, Michigan
Dr. Flermoen's primary practice is Corewell Health Lakeland Hospitals - Saint Joseph Hospital, at 1234 Napier Avenue, Saint Joseph, MI 49085 in Berrien County. The practice phone is (269) 983-8300.
- Corewell Health Lakeland Hospitals - Saint Joseph Hospital1234 Napier Avenue, Saint Joseph, MI 49085 · Berrien CountyPhone(269) 983-8300
Source: Dmand AI Affiliation Data
Dr. Gregory Alan Flermoen is affiliated with 2 sites of care and 4 medical groups
Dr. Flermoen's primary practice is Corewell Health Lakeland Hospitals - Saint Joseph Hospital in Saint Joseph, Michigan, part of Corewell Health. Dr. Flermoen is also affiliated with Memorial Healthcare. The medical group on file is Corewell Health Lakeland Hospitals. Dmand AI also links Dr. Flermoen to 3 more medical groups, each named with a free account. Dr. Flermoen's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory Alan Flermoen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flermoen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Corewell Health Lakeland Hospitals - Saint Joseph Hospital | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Alan Flermoen is one of 1,095 general surgeons in Michigan
Surgery is Dr. Flermoen's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Flermoen is licensed in Michigan.
Specialties and state licenses
- Surgery, MichiganPrimary
General surgeons near Dr. Flermoen
Counts of general surgeons 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. Gregory Alan Flermoen billed Medicare for 89 services in 2024
CMS data shows 89 Medicare services from Dr. Flermoen across 4 procedure codes in 2024, all of them office visits, for 111 Medicare patients. Medicare paid $5,627 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Flermoen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1102024: 8919%
Dr. Flermoen compared with the Michigan median for general surgeons, 2024
- Dr. Flermoen
- Michigan median
- Medicare services
- 89vs 12629% below
- Medicare patients
- 111vs 107Close to median
- Part D claims
- 96vs 303.2 times
Medians across 1,046 general surgeons in Michigan with Dmand AI profiles that report each measure.
Dr. Flermoen'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Flermoen and other general surgeons in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Alan Flermoen treated 111 Medicare patients in 2024, average age 71
CMS counts 111 Medicare patients who saw Dr. Flermoen in 2024. The largest group is 65 to 74, with 43 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.85, 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. Flermoen's median patient age at 64, with 44% women.
Dr. Flermoen's Medicare patients by age, 2024
Dr. Flermoen's Medicare patients by sex, 2024
- Women5146%
- Men6054%
Chronic conditions among Dr. Flermoen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Mood disorders41%
- Diabetes40%
- Anxiety35%
- Depression35%
- COPD33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Flermoen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Alan Flermoen wrote 164 Medicare Part D claims in 2024
In 2024, Dr. Flermoen wrote 164 Medicare Part D claims for 87 patients. 98% of them were for generic drugs. CMS names the drug for 96 of them, across 3 drugs with 11 or more claims each, at $172 in total drug cost. In 2023, CMS named 75 claims across 4 drugs.
Dr. Flermoen's Part D claims by kind of drug, 2024
- Generic160 claims98%
- Brand-name and other4 claims2%
Dr. Flermoen'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. Flermoen's Part D claims, 2024
- Opioids40%66 of 164 claims
- Antibiotics17%28 of 164 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: 752024: 9628%
Drugs named by CMS: 3 in 2024, 4 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. Gregory Alan Flermoen takes part in Medicare
Dr. Flermoen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory Alan Flermoen received $7,409 in industry payments from 2018 to 2025
CMS Open Payments shows 73 general payments to Dr. Flermoen from 20 drug and device companies from 2018 to 2025. Travel and lodging make up the largest share, 45% of the total. Intuitive Surgical, Inc. paid the most, $6,353.
General payments to Dr. Flermoen by program year, 2018 to 2025
General payments to Dr. Flermoen by kind, 2018 to 2025
- Travel and lodging$3,34345%
- Education$2,53134%
- Food and beverage$1,53421%
Companies that paid Dr. Flermoen the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory Alan Flermoen graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Flermoen graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Alan Flermoen'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 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)Doctors and Clinicians Utilization Data (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. Gregory Alan Flermoen
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. Gregory Alan Flermoen's NPI number?
Dr. Gregory Alan Flermoen's NPI number is 1508178682. It was assigned on July 6, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Alan Flermoen?
Dr. Gregory Alan Flermoen is a general surgeon in Saint Joseph, Michigan. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Gregory Alan Flermoen practice?
Dr. Flermoen practices at 1234 Napier Avenue, Saint Joseph, MI 49085. Dr. Flermoen's primary practice is Corewell Health Lakeland Hospitals - Saint Joseph Hospital in Saint Joseph, Michigan, part of Corewell Health. Dmand AI also links Dr. Flermoen to 3 medical groups.
What is Dr. Gregory Alan Flermoen's office phone number?
The practice phone on file for Dr. Flermoen is (269) 983-8300.
What is Dr. Gregory Alan Flermoen's medical license number?
Dr. Flermoen holds Michigan license 4301096517.
Which hospitals is Dr. Gregory Alan Flermoen affiliated with?
Dr. Flermoen practices at Corewell Health Lakeland Hospitals - Saint Joseph Hospital in Saint Joseph, Michigan. Dr. Flermoen is also affiliated with Memorial Healthcare.
What medical group is Dr. Gregory Alan Flermoen part of?
Dr. Flermoen is linked to Corewell Health Lakeland Hospitals. Dmand AI links Dr. Flermoen to 3 more medical groups.
Does Dr. Gregory Alan Flermoen accept Medicare?
Yes. CMS data shows Dr. Flermoen billed Medicare for 89 services in 2024, and Dr. Flermoen accepts Medicare assignment.
How many Medicare patients does Dr. Gregory Alan Flermoen see?
CMS counts 111 Medicare patients who saw Dr. Flermoen in 2024, with an average age of 71.
What services does Dr. Gregory Alan Flermoen bill to Medicare?
In 2024, Dr. Flermoen's most billed Medicare services were office visit, new patient (99203), office visit, new patient (99204) and office visit, established patient (99214).
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Where did Dr. Gregory Alan Flermoen go to medical school?
Dr. Flermoen graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2010.
What drugs does Dr. Gregory Alan Flermoen prescribe most?
In 2024 Medicare Part D data, Dr. Flermoen's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Ibuprofen and Tramadol HCl.
Has Dr. Gregory Alan Flermoen received payments from drug or device companies?
CMS Open Payments shows $7,409 in general payments to Dr. Flermoen from 20 companies from 2018 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gregory Alan Flermoen been practicing?
Dr. Flermoen graduated from medical school in 2010, 16 years ago.
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