Active NPI 1104245307 Individual Practitioner Male Practitioner

Dr. Gregory Grimberg , MD

Surgery • Mason City, IA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Gregory Grimberg, MD is a certified Surgery practicing in Mason City, IA. With approximately 12 years of clinical experience since graduating from State University Of New York Downstate Medical Center in 2014, Dr. Grimberg delivers high-quality medical care to the local community at 250 S CRESCENT DR.

Dr. Grimberg maintains professional affiliations with North Iowa Mercy Clinics, Mason City Clinic Pc and accepts Medicare assignment.

Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, established patient outpatient office visit, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

250 S Crescent Dr

Mason City, IA 504012926

Telephone 6414945300

Fax 6414945321

Associated Practice Facility / Clinic

🏢 Mason City Clinic Facility NPI 1710936604

Medicare Profile & Education

Medical School

State University Of New York Downstate Medical Center

Graduation Year

2014

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Mason City, IA

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

12 Yrs -13.8 yrs vs City Avg

City Avg: 25.8 Yrs

State Avg: 26.0 Yrs

Regional Practice Density

6 Specialists

Practicing in Mason City, IA (452 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

74.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Grimberg (12 Years) 12 Yrs

Mason City Specialty Average (25.8 Years) 25.8 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
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	109	32	$170.00	$72.36
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	109	71	$300.00	$132.68
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	95	62	$45.00	$15.28
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	76	68	$1100.00	$89.29
99231 Follow-up hospital inpatient care per day, typically 15 minutes	66	12	$90.00	$45.46
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	46	44	$440.00	$159.06
91040 Study of esophageal sensation by balloon distension	46	32	$200.22	$44.14
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	41	21	$240.00	$108.59
91035 Monitoring and recording of esophageal function through a capsule attached to the esophagus wall	33	33	$280.00	$72.22
91010 Study of esophagus to assess movement	29	29	$220.00	$57.78
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	27	27	$430.00	$166.05
43281 Repair of hernia of muscle at esophagus and stomach using an endoscope	21	21	$5447.14	$1344.04
43249 Balloon dilation of esophagus using an endoscope	18	14	$620.00	$119.59
43246 Insertion of stomach tube using a flexible endoscope	15	15	$891.00	$178.39
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	14	13	$300.00	$149.33

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	135	35	$159.16	$73.90
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	84	75	$1034.52	$99.62
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	74	53	$295.62	$133.66
91040 Study of esophageal sensation by balloon distension	54	38	$171.11	$45.81
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	35	30	$220.00	$91.00
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	35	34	$435.29	$162.10
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	34	15	$238.24	$111.20
91010 Study of esophagus to assess movement	33	32	$208.18	$60.28
91035 Monitoring and recording of esophageal function through a capsule attached to the esophagus wall	33	33	$260.67	$75.45
43281 Repair of hernia of muscle at esophagus and stomach using an endoscope	27	27	$4977.41	$1372.05
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	20	20	$423.35	$168.00
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	19	19	$329.00	$124.30
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	19	19	$279.79	$121.24
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	13	13	$886.15	$102.88

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	74	69	$850.00	$122.75
91040 Study of esophageal sensation by balloon distension	67	47	$150.00	$47.16
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	59	47	$214.51	$94.06
99213 Established patient office or other outpatient visit, typically 15 minutes	56	43	$144.64	$63.88
91035 Monitoring and recording of esophageal function through a capsule attached to the esophagus wall	45	44	$222.00	$78.23
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	44	24	$146.00	$67.33
91010 Study of esophagus to assess movement	34	34	$181.00	$63.09
99221 Initial hospital inpatient care per day, typically 30 minutes	33	33	$203.00	$94.09
43281 Repair of hernia of muscle at esophagus and stomach using an endoscope	33	32	$3830.26	$1344.96
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	30	27	$276.00	$127.80
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	25	25	$329.00	$128.79
99231 Follow-up hospital inpatient care per day, typically 15 minutes	18	11	$81.00	$36.60
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	18	18	$288.00	$139.49
99152 Moderate sedation services by physician also performing a procedure, patient 5 years of age or older, first 15 minutes	13	13	$92.00	$11.75
G0500 Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	13	13	$92.00	$5.01
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	12	12	$411.00	$174.54
49321 Biopsy of abdomen using an endoscope	11	11	$928.00	$189.05

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	70	31	$81.00	$36.44
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	43	43	$850.00	$119.86
99213 Established patient office or other outpatient visit, typically 15 minutes	41	35	$144.00	$64.25
91040 Study of esophageal sensation by balloon distension	39	31	$150.00	$46.91
99221 Initial hospital inpatient care per day, typically 30 minutes	33	31	$203.00	$94.65
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	30	30	$276.00	$128.37
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	28	28	$411.00	$175.46
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	26	24	$288.00	$139.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	25	$214.00	$95.02
43281 Repair of hernia of muscle at esophagus and stomach using an endoscope	24	24	$2569.33	$844.32
91035 Monitoring and recording of esophageal function through a capsule attached to the esophagus wall	22	22	$222.00	$78.63
91010 Study of esophagus to assess movement	18	18	$181.00	$61.18
G0500 Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	14	13	$92.00	$5.05
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$329.00	$129.26

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	24	12	$97.67	$39.47
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	11	11	$411.00	$162.22

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99221 Initial hospital inpatient care per day, typically 30 minutes	13	13	$316.00	$107.50

Medical Specialties & State Licenses

CMS Verified: 2020-08-28

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License IA MD-47527

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.

Surgery

NUCC Taxonomy Code: 208600000X

State License MD D86982

Hospital & Practice Group Affiliations

North Iowa Mercy Clinics

1000 4th St Sw, Mason City, IA 504012800

Mason City Clinic Pc

1000 4th Sw St, Mason City, IA 504012800

Phone: 6414287000

North Iowa Mercy Clinics

635 E Us Hwy 9, Forest City, IA 504361028

Phone: 6415852904

Mason City Clinic Pc

250 S Crescent Dr, Mason City, IA 504012926

North Iowa Mercy Clinics

910 N Eisenhower Ave, Mason City, IA 504011525

Mason City Clinic Pc

250 S Crescent Dr, Mason City, IA 504012926

Phone: 6414945200

Secondary Practice Locations

4940 Eastern Ave Rm 3933d

Baltimore, MD 212242735

Phone: 4105506875

Practice Associates & Co-Workers

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

22 Associated Practitioners

Dr. Byron Beasley , MD

Internal Medicine - Cardiovascular Disease

NPI 1053398180

Doctor of Medicine (M.D.)

Dr. Michael Del Rio , MD

Thoracic Surgery (Cardiothoracic Vascular Surgery)

NPI 1073557757

Doctor of Medicine (M.D.)

Dr. Adam Hoffmann , DO

Internal Medicine

NPI 1093339871

Doctor of Osteopathic Medicine (D.O.)

Nicole Sheffield , ARNP

Nurse Practitioner - Family

NPI 1124583281

Advanced Registered Nurse Practitioner

Dr. Michael Sarik , DO

Internal Medicine - Clinical Cardiac Electrophysiology

NPI 1154319358

Doctor of Osteopathic Medicine (D.O.)

Andrea Nicholson

Nurse Practitioner

NPI 1205280005

Career & Practice History Timeline

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

12 Historical Events

📍

Updated Practice Location August 28, 2020

Registered at 250 S CRESCENT DR, MASON CITY, IA 504012926 (Tel: 6414945300)

📍

Updated Business Mailing Address August 28, 2020

Registered at 250 S CRESCENT DR, MASON CITY, IA 504012926 (Tel: 6414945300)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 28, 2020

Surgery (License #MD-47527 in IA)

📍

Updated Practice Location August 06, 2019

Registered at 4940 EASTERN AVE RM 3933D, BALTIMORE, MD 212242735 (Tel: 4105506875)

📍

Updated Business Mailing Address August 06, 2019

Registered at 9910 FRANKLIN SQUARE DR STE 2110, BALTIMORE, MD 212364902 (Tel: 4109336423)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 06, 2019

Surgery (License #D86982 in MD)

✅

NPI Profile Active June 08, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location June 08, 2015

Registered at 185 SOUTH ORANGE AVE, DEPARTMENT OF SURGERY, NEWARK, NJ 071011709 (Tel: 9739724417)

📍

Updated Business Mailing Address June 08, 2015

Registered at 185 S ORANGE AVE, DEPARTMENT OF SURGERY, NEWARK, NJ 071032757 (Tel: 9739724417)

👤

Provider Name / Credentials Updated June 08, 2015

Recorded as GREGORY GRIMBERG, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 08, 2015

Student in an Organized Health Care Education/Training Program

🟢

Initial NPI Registration & Enumeration April 15, 2014

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1104245307

Entity Type:

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

Enumeration Date: April 15, 2014

Last Update: August 28, 2020

Sole Proprietor: No

Update or Correct Profile

Mailing Address

250 S Crescent Dr

Mason City, IA 504012926

Phone: 6414945300

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.