Active NPI 1720283310 Individual Practitioner Male Practitioner

Dr. Chet W Hammill , MD

Surgery • Portland, OR

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Chet Hammill, MD is a certified Surgery practicing in Portland, OR. With approximately 28 years of clinical experience since graduating from University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb) in 1998, Dr. Hammill delivers high-quality medical care to the local community at 4805 NE GLISAN ST STE 6N60.

Dr. Hammill is affiliated with The Oregon Clinic, Pc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, new patient outpatient office visit, initial 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

4805 Ne Glisan St Ste 6n60

Portland, OR 972132933

Telephone 5032810561

Fax 5034167377

Associated Practice Facility / Clinic

🏢 The Endoscopy Center At West Hills Gastroenterology, Llc Facility NPI 1548267297

Medicare Profile & Education

Medical School

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

Graduation Year

1998

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Portland, OR

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

28 Yrs +7.1 yrs vs City Avg

City Avg: 20.9 Yrs

State Avg: 23.3 Yrs

Regional Practice Density

177 Specialists

Practicing in Portland, OR (555 Statewide)

Telehealth Adoption Rate

23.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

51.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Hammill (28 Years) 28 Yrs

Portland Specialty Average (20.9 Years) 20.9 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2022)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	25	$235.00	$124.81
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$385.00	$168.00
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	11	11	$339.00	$169.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	24	$235.00	$130.65
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	24	23	$339.00	$182.41
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	22	22	$490.00	$214.87
99221 Initial hospital inpatient care per day, typically 30 minutes	15	15	$215.00	$100.86
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	14	$355.00	$135.85

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	47	39	$230.00	$109.62
99231 Follow-up hospital inpatient care per day, typically 15 minutes	34	15	$125.00	$39.98
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	23	23	$375.00	$165.75
99213 Established patient office or other outpatient visit, typically 15 minutes	20	19	$145.00	$75.47
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	16	15	$355.00	$139.80
99442 Telephone medical discussion with physician, 11-20 minutes	11	11	$71.82	$66.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	25	21	$145.00	$73.70
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	20	20	$375.00	$163.87
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	15	13	$230.00	$108.03
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	14	$355.00	$137.60

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	37	17	$120.00	$39.02
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	36	32	$200.00	$105.88
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	34	34	$334.12	$162.31
76998 Ultrasonic guidance during surgery	30	26	$380.00	$62.64
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	21	21	$422.86	$204.58
99213 Established patient office or other outpatient visit, typically 15 minutes	15	11	$128.33	$71.63
99221 Initial hospital inpatient care per day, typically 30 minutes	13	11	$185.00	$100.92
47562 Removal of gallbladder using an endoscope	11	11	$3554.55	$642.92
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	11	11	$308.18	$136.16

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	30	30	$391.67	$202.68
99213 Established patient office or other outpatient visit, typically 15 minutes	18	14	$117.89	$71.29
76998 Ultrasonic guidance during surgery	16	16	$380.00	$63.63
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$317.56	$161.13
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	15	14	$190.00	$104.97

Medical Specialties & State Licenses

CMS Verified: 2025-12-04

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License OR MD215325

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 MO 2017006874

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

500607946 (OR)

Medicaid State Provider ID

200040877 (MO)

Medicaid State Provider ID

2003573 (WA)

Hospital & Practice Group Affiliations

The Oregon Clinic, Pc

5050 Ne Hoyt, Portland, OR 972132990

Phone: 5032396673

The Oregon Clinic, Pc

4805 Ne Glisan, Portland, OR 972132933

Secondary Practice Locations

5050 Ne Hoyt St Ste 610

Portland, OR 972132985

Phone: 5034674761

Practice Associates & Co-Workers

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

21 Associated Practitioners

Dr. Christy Dunst , MD

Surgery

NPI 1073684890

Doctor of Medicine (M.D.)

Dr. Shaghayegh Aliabadi , MD

Surgery

NPI 1083785562

Doctor of Medicine (M.D.)

Dr. Paul Hansen , MD

Surgery

NPI 1104818632

Doctor of Medicine (M.D.)

Dr. John Zelko , MD

Surgery

NPI 1124098033

Doctor of Medicine (M.D.)

Shannon Stoll , PA-C

Physician Assistant - Surgical

NPI 1144896879

Physician Assistant (Certified)

Dr. Roy Breen , MD

Colon & Rectal Surgery

NPI 1164594248

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

19 Historical Events

📍

Updated Practice Location March 25, 2024

Registered at 4805 NE GLISAN ST STE 6N60, PORTLAND, OR 972132933 (Tel: 5032810561)

📍

Updated Business Mailing Address March 25, 2024

Registered at 541 NE 20TH AVE STE 225, PORTLAND, OR 972322895 (Tel: 5039632801)

📍

Updated Practice Location November 15, 2021

Registered at 4921 PARKVIEW PL, DIV SURG HPB, STE 12C, SAINT LOUIS, MO 631101032 (Tel: 3147470410)

📍

Updated Business Mailing Address November 15, 2021

Registered at 660 S EUCLID AVE, MSC 8109-05-05, SAINT LOUIS, MO 631101010 (Tel: 3147470410)

✅

NPI Profile Active January 24, 2018

NPI status registered as active in NPPES database

📍

Updated Practice Location January 24, 2018

Registered at 4921 PARKVIEW PL STE 8C, STE 8C, SAINT LOUIS, MO 631101032 (Tel: 3142731809)

📍

Updated Business Mailing Address January 24, 2018

Registered at 660 S EUCLID AVE, C B 8109, SAINT LOUIS, MO 631101010 (Tel: 3142731809)

👤

Provider Name / Credentials Updated January 24, 2018

Recorded as CHET HAMMILL, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 24, 2018

Surgery (License #2017006874 in MO)

📍

Updated Practice Location March 28, 2017

Registered at 4921 PARKVIEW PL, STE 8C, SAINT LOUIS, MO 631101032 (Tel: 3147471369)

📍

Updated Business Mailing Address March 28, 2017

Registered at 660 S EUCLID AVE, C B 8109, SAINT LOUIS, MO 631101010 (Tel: 3147471369)

👤

Provider Name / Credentials Updated March 28, 2017

Recorded as CHET HAMMILL, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 28, 2017

Surgery (License #2017006874 in MO)

✅

NPI Profile Active September 19, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location September 19, 2013

Registered at 4805 NE GLISAN ST, SUITE 6N60, PORTLAND, OR 972132933 (Tel: 5032810561)

📍

Updated Business Mailing Address September 19, 2013

Registered at 847 NE 19TH AVE, SUITE 300, PORTLAND, OR 972322684 (Tel: 5039632801)

👤

Provider Name / Credentials Updated September 19, 2013

Recorded as CHET HAMMILL, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 19, 2013

Surgery (License #MD29049 in OR)

🟢

Initial NPI Registration & Enumeration June 15, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

No patient reviews submitted yet for Dr. Chet Hammill. Be the first to share your experience!

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1720283310

Entity Type:

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

Enumeration Date: June 15, 2007

Last Update: December 04, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

541 Ne 20th Ave Ste 225

Portland, OR 972322895

Phone: 5039632801

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.