Active NPI 1154307858 Individual Practitioner Male Practitioner

Dr. David R Giammar , MD

Colon & Rectal Surgery • Hilliard, OH

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. David Giammar, MD is a certified Colon & Rectal Surgery practicing in Hilliard, OH. With approximately 30 years of clinical experience since graduating from Northeastern Ohio University College Of Medicine in 1996, Dr. Giammar delivers high-quality medical care to the local community at 3853 TRUEMAN CT.

Dr. Giammar maintains professional affiliations with Prime Healthcare Foundation - Coshocton, Llc, Ohio Specialty Physicians Corporation, Jtdm Family Practice Llc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, follow-up hospital inpatient care per day, initial hospital care with straightforward or low-level medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

3853 Trueman Ct

Hilliard, OH 430262496

Telephone 6142102563

Fax 6142102563

Medicare Profile & Education

Medical School

Northeastern Ohio University College Of Medicine

Graduation Year

1996

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Colon & Rectal Surgery in Hilliard, OH

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

30 Yrs Matches City Avg

City Avg: 30.0 Yrs

State Avg: 26.5 Yrs

Regional Practice Density

1 Specialists

Practicing in Hilliard, OH (124 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

59.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Giammar (30 Years) 30 Yrs

Hilliard Specialty Average (30.0 Years) 30.0 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
99213 Established patient office or other outpatient visit, typically 15 minutes	68	42	$158.00	$84.95
99231 Follow-up hospital inpatient care per day, typically 15 minutes	63	51	$62.46	$46.46
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	51	51	$201.16	$119.84
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	34	26	$120.18	$74.89
99442 Telephone medical discussion with physician, 11-20 minutes	24	14	$140.00	$85.08
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	23	23	$241.39	$105.12
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	16	$239.00	$120.76
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	20	19	$460.90	$95.83
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	19	19	$385.16	$159.79
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	15	15	$371.00	$157.99
45380 Biopsy of large bowel using an endoscope	14	14	$490.64	$169.20
45378 Diagnostic exam of large bowel using a flexible endoscope	14	14	$532.00	$167.37

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	93	58	$76.27	$49.57
99213 Established patient office or other outpatient visit, typically 15 minutes	89	44	$156.65	$85.77
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	86	62	$129.07	$76.62
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	49	48	$230.80	$129.75
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	36	35	$376.47	$170.75
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	26	26	$244.00	$107.12
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	20	$239.00	$121.92
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	23	23	$495.26	$106.46
99442 Telephone medical discussion with physician, 11-20 minutes	19	14	$140.00	$85.81
45380 Biopsy of large bowel using an endoscope	19	19	$435.00	$186.73

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	108	79	$126.55	$69.33
99231 Follow-up hospital inpatient care per day, typically 15 minutes	83	58	$67.02	$37.87
99213 Established patient office or other outpatient visit, typically 15 minutes	46	24	$158.00	$87.55
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	40	37	$392.30	$192.24
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	27	27	$241.78	$108.57
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	16	16	$634.50	$93.08
45380 Biopsy of large bowel using an endoscope	14	14	$601.93	$182.08
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$251.75	$132.22

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	79	34	$158.00	$89.00
99231 Follow-up hospital inpatient care per day, typically 15 minutes	50	26	$71.36	$37.84
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	36	30	$125.58	$70.87
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	33	33	$244.00	$107.09
45380 Biopsy of large bowel using an endoscope	20	20	$473.95	$172.16
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	19	18	$403.84	$196.45
45378 Diagnostic exam of large bowel using a flexible endoscope	11	11	$456.00	$167.83

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	134	73	$156.83	$72.51
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	37	37	$240.00	$104.77
99231 Follow-up hospital inpatient care per day, typically 15 minutes	35	20	$71.66	$39.10
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	25	23	$95.36	$43.78
46600 Diagnostic examination of the anus using an endoscope	24	21	$185.88	$98.83
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	22	21	$123.73	$71.85
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	21	18	$471.19	$82.65
45380 Biopsy of large bowel using an endoscope	20	19	$598.50	$165.34
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	18	$231.95	$105.74
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	16	$287.78	$137.00
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	14	$419.71	$189.53
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	13	12	$745.46	$223.67

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	214	114	$126.16	$58.23
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	109	70	$199.57	$72.45
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	86	86	$213.36	$93.03
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	70	65	$354.91	$134.41
99231 Follow-up hospital inpatient care per day, typically 15 minutes	49	32	$99.62	$39.26
45380 Biopsy of large bowel using an endoscope	46	46	$624.15	$170.84
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	46	44	$576.02	$94.49
46600 Diagnostic examination of the anus using an endoscope	29	29	$165.52	$70.91
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	27	26	$71.07	$29.70
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	25	24	$495.88	$193.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	22	20	$198.95	$86.03
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	15	15	$778.07	$257.62
99221 Initial hospital inpatient care per day, typically 30 minutes	12	12	$313.59	$105.77
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$291.08	$139.81
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	11	11	$465.18	$169.27

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	187	103	$119.19	$56.01
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	144	71	$197.41	$68.44
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	75	75	$211.67	$91.46
99231 Follow-up hospital inpatient care per day, typically 15 minutes	60	39	$103.19	$37.44
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	37	34	$564.57	$105.17
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	29	$67.94	$28.62
46600 Diagnostic examination of the anus using an endoscope	33	30	$159.00	$65.95
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	29	25	$194.10	$89.17
99221 Initial hospital inpatient care per day, typically 30 minutes	28	28	$283.01	$97.00
45380 Biopsy of large bowel using an endoscope	26	26	$570.27	$171.35
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	21	$345.50	$125.36
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	23	21	$430.87	$195.35
45388 Destruction of polyp or growth of large bowel using a flexible endoscope	16	16	$1400.00	$275.07
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	13	13	$482.31	$176.58
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$297.50	$140.68

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	131	84	$113.41	$55.72
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	95	52	$189.32	$68.07
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	60	60	$198.00	$88.29
99231 Follow-up hospital inpatient care per day, typically 15 minutes	40	26	$111.56	$36.99
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	39	33	$65.41	$28.86
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	36	36	$352.50	$129.75
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	29	29	$264.24	$135.84
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	28	27	$580.57	$90.83
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	24	24	$100.00	$5.44
45380 Biopsy of large bowel using an endoscope	22	22	$707.18	$156.21
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	15	$163.05	$82.86
46600 Diagnostic examination of the anus using an endoscope	20	18	$181.65	$78.58
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	16	$437.89	$192.23
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	17	17	$496.76	$169.55
45388 Destruction of polyp or growth of large bowel using a flexible endoscope	15	15	$692.13	$269.43
45378 Diagnostic exam of large bowel using a flexible endoscope	13	13	$590.79	$153.86

Medical Specialties & State Licenses

CMS Verified: 2026-04-16

Colon & Rectal Surgery Primary Specialty

NUCC Taxonomy Code: 208C00000X

State License OH 35.077358

A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.

Colon & Rectal Surgery

NUCC Taxonomy Code: 208C00000X

State License MI 4301102844

Hospital & Practice Group Affiliations

Ohio Specialty Physicians Corporation

2600 Tuscarawas St W, Canton, OH 447084676

Phone: 3304534300

Jtdm Family Practice Llc

1140 S Knoxville Ave, Saint Marys, OH 458852609

Phone: 4193949595

Prime Healthcare Foundation - Coshocton, Llc

1460 Orange St, Coshocton, OH 438122229

Phone: 7406226411

Practice Associates & Co-Workers

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

4 Associated Practitioners

Dr. Andrea Costanza , DO

Dermatology

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Doctor of Osteopathic Medicine (D.O.)

Dr. Rosemary Oaks , DO

Dermatology

NPI 1104403609

Doctor of Osteopathic Medicine (D.O.)

Dr. Katie Wang , DO

Dermatology

NPI 1477948305

Doctor of Osteopathic Medicine (D.O.)

Dr. Marya Cassandra , DO

Dermatology

NPI 1912979386

Doctor of Osteopathic Medicine (D.O.)

Career & Practice History Timeline

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

13 Historical Events

📍

Updated Practice Location April 16, 2026

Registered at 3853 TRUEMAN CT, HILLIARD, OH 430262496 (Tel: 6142102563)

📍

Updated Business Mailing Address April 16, 2026

Registered at 3853 TRUEMAN CT, HILLIARD, OH 430262496 (Tel: 6142102563)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 16, 2026

Colon & Rectal Surgery (License #35.077358 in OH)

📍

Updated Business Mailing Address November 11, 2022

Registered at 477 COOPER RD STE 440, WESTERVILLE, OH 430818055 (Tel: 3808985561)

📍

Updated Practice Location April 26, 2022

Registered at 477 COOPER RD STE 440, WESTERVILLE, OH 430818055 (Tel: 3808985561)

📍

Updated Business Mailing Address April 26, 2022

Registered at 136 LINDEN DR STE 104, WINCHESTER, VA 226016900 (Tel: 5406783588)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 26, 2022

Colon & Rectal Surgery (License #4301102844 in MI)

✅

NPI Profile Active April 30, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location April 30, 2014

Registered at 5965 E BROAD ST, SUITE 120, COLUMBUS, OH 432131562 (Tel: 6148641000)

📍

Updated Business Mailing Address April 30, 2014

Registered at 5965 E BROAD ST, SUITE 120, COLUMBUS, OH 432131562 (Tel: 6148641000)

👤

Provider Name / Credentials Updated April 30, 2014

Recorded as DAVID GIAMMAR, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 30, 2014

Specialist (License #35077358 in OH)

🟢

Initial NPI Registration & Enumeration December 15, 2005

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: 1154307858

Entity Type:

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

Enumeration Date: December 15, 2005

Last Update: April 16, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

3853 Trueman Ct

Hilliard, OH 430262496

Phone: 6142102563

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.