Active NPI 1508178682 Individual Practitioner Male Practitioner

Dr. Gregory Alan Flermoen , MD

Surgery • Saint Joseph, MI

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Gregory Flermoen, MD is a certified Surgery practicing in Saint Joseph, MI. With approximately 16 years of clinical experience since graduating from University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb) in 2010, Dr. Flermoen delivers high-quality medical care to the local community at 1234 NAPIER AVE.

Dr. Flermoen is affiliated with Memorial Hospital and accepts Medicare assignment.

Frequently performed procedures and clinical services include new patient outpatient office visit, established patient outpatient office visit, follow-up hospital inpatient care per day. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1234 Napier Ave

Saint Joseph, MI 490852112

Telephone 2694290900

Associated Practice Facility / Clinic

🏢 Sunset Coast Anesthesia Associates Pc Facility NPI 1053382572

Medicare Profile & Education

Medical School

University Of Illinois College Of Med (Chi/peor/rock/chm-Urb)

Graduation Year

2010

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Saint Joseph, MI

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

16 Yrs -1.6 yrs vs City Avg

City Avg: 17.6 Yrs

State Avg: 25.8 Yrs

Regional Practice Density

16 Specialists

Practicing in Saint Joseph, MI (1479 Statewide)

Telehealth Adoption Rate

6.2% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

38.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Flermoen (16 Years) 16 Yrs

Saint Joseph Specialty Average (17.6 Years) 17.6 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	31	31	$141.00	$78.69
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	20	$140.00	$92.88
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	20	20	$214.00	$128.09
99213 Established patient office or other outpatient visit, typically 15 minutes	18	15	$94.00	$62.84

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	25	25	$141.00	$81.39
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	24	24	$214.00	$130.73
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	18	11	$57.00	$34.85
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	16	$140.00	$95.47
99231 Follow-up hospital inpatient care per day, typically 15 minutes	15	12	$50.00	$48.95
99213 Established patient office or other outpatient visit, typically 15 minutes	12	11	$94.00	$64.67

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	28	19	$50.00	$37.94
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	18	18	$214.00	$133.39
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$140.92	$82.47

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	75	49	$50.00	$37.88
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	32	32	$140.91	$83.19
99221 Initial hospital inpatient care per day, typically 30 minutes	27	25	$131.00	$99.76
99213 Established patient office or other outpatient visit, typically 15 minutes	20	18	$94.10	$67.05
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	20	20	$214.00	$135.21

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	48	36	$50.00	$39.43
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	28	28	$140.96	$76.02
99213 Established patient office or other outpatient visit, typically 15 minutes	19	14	$94.00	$51.65
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	19	16	$140.00	$79.18

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	74	41	$50.31	$38.98
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	23	23	$140.78	$75.47
99221 Initial hospital inpatient care per day, typically 30 minutes	18	18	$131.00	$100.46
99213 Established patient office or other outpatient visit, typically 15 minutes	17	12	$93.65	$50.53
99282 Emergency department visit with straightforward medical decision making	15	15	$73.00	$41.39
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	13	11	$140.00	$77.84
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	13	12	$92.00	$71.92
99238 Hospital discharge day management, 30 minutes or less	12	12	$130.00	$71.89

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	27	19	$50.00	$37.76
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	17	$179.67	$132.72
99221 Initial hospital inpatient care per day, typically 30 minutes	15	15	$132.07	$98.15
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	15	15	$144.00	$104.25
47562 Removal of gallbladder using an endoscope	11	11	$862.39	$451.16

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	32	19	$95.88	$70.43
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	28	28	$144.00	$98.50
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	25	24	$189.72	$133.77
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	15	15	$220.00	$148.84
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	12	12	$504.00	$128.41
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	12	12	$142.00	$102.92
45380 Biopsy of large bowel using an endoscope	11	11	$712.45	$176.63

Medical Specialties & State Licenses

CMS Verified: 2026-03-30

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License MI 4301096517

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Hospital & Practice Group Affiliations

Memorial Hospital

826 W King St, Owosso, MI 488672120

Phone: 9897235211

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

15 Associated Practitioners

Lyndsey Olson , PA

Physician Assistant

NPI 1083152680

Physician Assistant

Dr. Jonathan Rubin , MD

Surgery

NPI 1104272228

Doctor of Medicine (M.D.)

Dr. Allison Vaughan , DO

Surgery

NPI 1235589227

Doctor of Osteopathic Medicine (D.O.)

Dr. Stephen Komara , DO

Surgery

NPI 1255628822

Doctor of Osteopathic Medicine (D.O.)

Dr. Nathan Piovesan , MD

Surgery

NPI 1265421143

Doctor of Medicine (M.D.)

Hillary Edgerly , NP

Nurse Practitioner

NPI 1386376002

Nurse Practitioner

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

8 Historical Events

📍

Updated Practice Location March 30, 2026

Registered at 1234 NAPIER AVE, SAINT JOSEPH, MI 490852112 (Tel: 2694290900)

📍

Updated Business Mailing Address March 30, 2026

Registered at 1234 NAPIER AVE, SAINT JOSEPH, MI 490852112

✅

NPI Profile Active July 06, 2010

NPI status registered as active in NPPES database

📍

Updated Practice Location July 06, 2010

Registered at 1000 MONROE AVE NW, GRAND RAPIDS, MI 495031455 (Tel: 6164508720)

📍

Updated Business Mailing Address July 06, 2010

Registered at 1000 MONROE AVE NW, GRAND RAPIDS, MI 495031455 (Tel: 6164508720)

👤

Provider Name / Credentials Updated July 06, 2010

Recorded as GREGORY FLERMOEN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 06, 2010

Surgery (License #4301096517 in MI)

🟢

Initial NPI Registration & Enumeration July 06, 2010

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1508178682

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: July 06, 2010

Last Update: March 30, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

1234 Napier Ave

Saint Joseph, MI 490852112

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.