Active NPI 1629152582 Individual Practitioner Male Practitioner

Dr. David W Kossoff , MD

Specialist • Frederick, MD

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. David Kossoff, MD is a certified Specialist practicing in Frederick, MD. With approximately 34 years of clinical experience since graduating from University Of Maryland School Of Medicine in 1992, Dr. Kossoff delivers high-quality medical care to the local community at 110 THOMAS JOHNSON DR STE 335.

Dr. Kossoff is affiliated with David W. Kossoff, M.D., Pa and accepts Medicare assignment.

Frequently performed procedures and clinical services include biopsy of large bowel using an endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

110 Thomas Johnson Dr Ste 335

Frederick, MD 217024949

Telephone 3016245566

Fax 3016245542

Associated Practice Facility / Clinic

🏢 David W. Kossoff, M.d., Llc Facility NPI 1437206984

Medicare Profile & Education

Medical School

University Of Maryland School Of Medicine

Graduation Year

1992

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Specialist in Frederick, MD

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

34 Yrs -1.0 yrs vs City Avg

City Avg: 35.0 Yrs

State Avg: 36.9 Yrs

Regional Practice Density

25 Specialists

Practicing in Frederick, MD (1034 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

94.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Kossoff (34 Years) 34 Yrs

Frederick Specialty Average (35.0 Years) 35.0 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
45380 Biopsy of large bowel using an endoscope	203	202	$1500.00	$95.18
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	122	122	$1426.00	$241.10
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	121	113	$1362.00	$72.93
43249 Balloon dilation of esophagus using an endoscope	29	27	$3249.00	$96.27
45381 Injection beneath lining of large bowel using a flexible endoscope	13	13	$1284.00	$15.21

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
45380 Biopsy of large bowel using an endoscope	153	153	$1494.87	$87.73
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	110	110	$1426.00	$247.41
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	82	80	$1164.63	$83.45
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	19	19	$1106.00	$178.23
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	15	15	$1092.40	$183.40

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
45380 Biopsy of large bowel using an endoscope	140	140	$1278.16	$108.22
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	101	99	$1050.74	$94.86
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	87	87	$1418.97	$260.23
99213 Established patient office or other outpatient visit, typically 15 minutes	78	69	$222.38	$94.01
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	22	22	$333.82	$117.13
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	11	11	$997.18	$179.12

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	102	102	$647.25	$90.76
45380 Biopsy of large bowel using an endoscope	95	95	$852.00	$131.41
99213 Established patient office or other outpatient visit, typically 15 minutes	49	45	$180.82	$92.12
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	48	48	$1342.42	$263.41
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	26	26	$929.81	$192.57
99221 Initial hospital inpatient care per day, typically 30 minutes	19	18	$243.42	$104.90
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	15	15	$923.87	$186.90
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	15	15	$230.00	$115.72
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	15	15	$225.00	$106.88
45378 Diagnostic exam of large bowel using a flexible endoscope	12	12	$872.50	$175.24

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	76	74	$665.26	$95.97
45380 Biopsy of large bowel using an endoscope	65	65	$858.46	$127.92
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	44	44	$1341.00	$263.07
99213 Established patient office or other outpatient visit, typically 15 minutes	28	27	$180.00	$68.76
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	21	21	$944.76	$193.42
99221 Initial hospital inpatient care per day, typically 30 minutes	16	16	$248.44	$106.25
99231 Follow-up hospital inpatient care per day, typically 15 minutes	11	11	$100.00	$40.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	194	144	$180.00	$75.95
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	156	149	$671.23	$102.55
99231 Follow-up hospital inpatient care per day, typically 15 minutes	121	68	$100.00	$40.69
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	98	98	$1350.37	$269.10
45384 Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery	84	84	$980.93	$174.70
45380 Biopsy of large bowel using an endoscope	57	57	$769.47	$93.36
99221 Initial hospital inpatient care per day, typically 30 minutes	51	50	$250.00	$104.93
45378 Diagnostic exam of large bowel using a flexible endoscope	47	47	$940.68	$194.79
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	46	42	$230.00	$107.73
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	24	24	$575.00	$123.45
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	21	21	$325.00	$141.51
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	16	16	$947.00	$198.87
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$225.00	$112.40
43249 Balloon dilation of esophagus using an endoscope	11	11	$781.82	$120.09
45330 Diagnostic exam of lower portion of large bowel using a flexible endoscope	11	11	$630.73	$54.61

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	338	244	$180.27	$72.99
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	184	175	$679.61	$101.86
99231 Follow-up hospital inpatient care per day, typically 15 minutes	152	75	$100.00	$40.08
45384 Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery	128	128	$930.05	$155.06
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	113	113	$225.00	$110.40
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	101	101	$1358.00	$266.50
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	85	73	$231.12	$105.71
99221 Initial hospital inpatient care per day, typically 30 minutes	59	57	$250.00	$103.72
45378 Diagnostic exam of large bowel using a flexible endoscope	56	56	$947.00	$197.24
45380 Biopsy of large bowel using an endoscope	51	51	$764.71	$93.93
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	39	39	$327.56	$163.02
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	36	36	$947.00	$196.30
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	33	32	$325.00	$139.76
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	27	27	$575.56	$118.75
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	22	21	$145.00	$74.37
45330 Diagnostic exam of lower portion of large bowel using a flexible endoscope	16	16	$450.00	$46.49
43249 Balloon dilation of esophagus using an endoscope	12	11	$758.33	$129.04

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	301	239	$180.00	$73.72
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	190	186	$652.19	$93.64
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	143	143	$225.00	$110.46
45384 Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery	137	137	$946.93	$161.32
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	99	99	$1358.00	$266.95
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	96	89	$230.00	$104.54
99231 Follow-up hospital inpatient care per day, typically 15 minutes	77	46	$100.00	$39.96
45378 Diagnostic exam of large bowel using a flexible endoscope	54	54	$947.00	$194.32
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	51	51	$328.92	$157.09
45380 Biopsy of large bowel using an endoscope	47	47	$787.66	$104.17
99221 Initial hospital inpatient care per day, typically 30 minutes	34	33	$250.00	$103.29
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	28	28	$947.00	$195.26
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	24	$325.00	$139.28
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	21	21	$577.14	$114.66
43249 Balloon dilation of esophagus using an endoscope	16	15	$900.00	$134.96

Medical Specialties & State Licenses

CMS Verified: 2025-09-17

Specialist Primary Specialty

NUCC Taxonomy Code: 174400000X

State License MD D0054121

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

133102701 (MD)

Commercial Insurance / Payer ID Alliance Mamsi

376329 (MD)

Commercial Insurance / Payer ID Railroad Medicare

P00206418 (MD)

Commercial Insurance / Payer ID Ncppo

494710 (MD)

Commercial Insurance / Payer ID Carefirst Of Maryland

682BDA (MD)

Commercial Insurance / Payer ID Carefirst Of National Cap

K4040001 (DC)

Commercial Insurance / Payer ID Informed

P10152 (MD)

Commercial Insurance / Payer ID United Healthcare

2027119 (MD)

Hospital & Practice Group Affiliations

David W. Kossoff, M.d., Pa

70 Thomas Johnson Dr, Frederick, MD 217024317

Phone: 3016245566

Practice Associates & Co-Workers

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

5 Associated Practitioners

Catherine Hunt , PA-C

Physician Assistant

NPI 1255301693

Physician Assistant (Certified)

Dr. Arash Zarrin , DO

Internal Medicine - Gastroenterology

NPI 1407351729

Doctor of Osteopathic Medicine (D.O.)

Dr. Pilin Francis , DO

Internal Medicine - Gastroenterology

NPI 1669967592

Doctor of Osteopathic Medicine (D.O.)

Robert Cathor , PA-C

Physician Assistant - Medical

NPI 1790954253

Physician Assistant (Certified)

Lindsay Bitto

Nurse Practitioner - Family

NPI 1972904845

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Practice Location September 17, 2025

Registered at 110 THOMAS JOHNSON DR STE 335, FREDERICK, MD 217024949 (Tel: 3016245566)

📍

Updated Business Mailing Address September 17, 2025

Registered at 110 THOMAS JOHNSON DR STE 335, FREDERICK, MD 217024949 (Tel: 3016245566)

✅

NPI Profile Active December 17, 2012

NPI status registered as active in NPPES database

📍

Updated Practice Location December 17, 2012

Registered at 56 THOMAS JOHNSON DR, SUITE 110, FREDERICK, MD 217024599 (Tel: 3016245566)

📍

Updated Business Mailing Address December 17, 2012

Registered at 56 THOMAS JOHNSON DR, SUITE 110, FREDERICK, MD 217024599 (Tel: 3016245566)

👤

Provider Name / Credentials Updated December 17, 2012

Recorded as DAVID KOSSOFF, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 17, 2012

Specialist (License #D0054121 in MD)

🟢

Initial NPI Registration & Enumeration October 25, 2006

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: 1629152582

Entity Type:

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

Enumeration Date: October 25, 2006

Last Update: September 17, 2025

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

110 Thomas Johnson Dr Ste 335

Frederick, MD 217024949

Phone: 3016245566

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.