Active NPI 1285640243 Individual Practitioner Male Practitioner

Dr. Denis Robert Westphal , MD

Surgery • Chico, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Denis Westphal, MD is a certified Surgery practicing in Chico, CA. With approximately 44 years of clinical experience since graduating from Loma Linda University School Of Medicine in 1982, Dr. Westphal delivers high-quality medical care to the local community at 95 DECLARATION DR.

Dr. Westphal is affiliated with Enloe Medical Center and accepts Medicare assignment.

Frequently performed procedures and clinical services include removal of skin and tissue, 20.0 sq cm or less, established patient outpatient office visit, management and supervision of oxygen chamber therapy per session. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

95 Declaration Dr
Suite 1

Chico, CA 959734916

Telephone 5303459455

Fax 5303456628

Associated Practice Facility / Clinic

🏢 Eugene D. Eddlemon, M.d., Inc. Facility NPI 1548470826

Medicare Profile & Education

Medical School

Loma Linda University School Of Medicine

Graduation Year

1982

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Chico, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

44 Yrs +19.0 yrs vs City Avg

City Avg: 25.0 Yrs

State Avg: 27.4 Yrs

Regional Practice Density

9 Specialists

Practicing in Chico, CA (3346 Statewide)

Telehealth Adoption Rate

22.2% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

56.6% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Westphal (44 Years) 44 Yrs

Chico Specialty Average (25.0 Years) 25.0 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
11042 Removal of skin and tissue, 20.0 sq cm or less	613	194	$135.00	$59.24
99213 Established patient office or other outpatient visit, typically 15 minutes	507	264	$150.88	$64.94
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	461	227	$79.43	$34.69
99183 Management and supervision of oxygen chamber therapy per session	237	20	$231.00	$102.50
97597 Removal of tissue from wound, 20.0 sq cm or less	84	57	$78.00	$34.51
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	82	59	$229.80	$95.23
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	63	19	$55.00	$24.14
17250 Application of chemical to stop tissue regrowth in wound	58	34	$85.00	$36.38
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	46	46	$181.00	$80.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	597	222	$134.00	$60.08
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	556	270	$80.40	$35.90
99213 Established patient office or other outpatient visit, typically 15 minutes	442	221	$148.78	$66.87
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	167	32	$56.00	$25.04
97597 Removal of tissue from wound, 20.0 sq cm or less	134	86	$79.00	$35.81
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	126	126	$184.00	$83.39
17250 Application of chemical to stop tissue regrowth in wound	109	66	$84.00	$35.92
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	95	75	$220.34	$98.28
99202 New patient office or other outpatient visit, typically 20 minutes	21	21	$107.00	$48.69
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$297.00	$130.32
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	17	11	$339.00	$154.05

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	501	198	$135.00	$59.99
99213 Established patient office or other outpatient visit, typically 15 minutes	324	189	$150.13	$67.00
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	194	134	$81.16	$36.52
99183 Management and supervision of oxygen chamber therapy per session	150	14	$238.00	$107.29
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	121	25	$58.00	$25.91
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	119	100	$221.00	$100.64
99213 Established patient office or other outpatient visit, typically 15 minutes	82	70	$150.26	$68.29
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	79	79	$186.00	$83.96
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	59	48	$221.00	$99.61
97597 Removal of tissue from wound, 20.0 sq cm or less	52	47	$81.00	$36.42
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	41	27	$341.00	$153.83
17250 Application of chemical to stop tissue regrowth in wound	40	33	$84.00	$35.09
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	29	29	$303.00	$134.05
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	26	26	$303.00	$136.78
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	22	14	$159.00	$72.01
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	21	21	$263.95	$136.48
76937 Ultrasonic guidance for blood vessel access	17	13	$93.00	$13.97
99202 New patient office or other outpatient visit, typically 20 minutes	16	16	$110.00	$49.57
47562 Removal of gallbladder using an endoscope	11	11	$1469.00	$617.06
49505 Repair of groin hernia (5 years or older)	11	11	$1168.00	$533.45

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	437	335	$215.25	$102.34
99213 Established patient office or other outpatient visit, typically 15 minutes	197	152	$145.26	$69.21
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	159	159	$293.00	$139.40
76937 Ultrasonic guidance for blood vessel access	47	33	$88.00	$14.16
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	40	40	$179.00	$85.48
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	38	38	$264.11	$138.23
49505 Repair of groin hernia (5 years or older)	35	35	$1119.00	$557.05
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	28	23	$28.00	$5.50
36902 Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist	26	16	$506.00	$237.16
36821 Relocation of arm vein with connection to arm artery, open procedure	24	23	$1378.00	$653.52
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	21	16	$154.00	$73.18
75710 Radiological supervision and interpretation of imaging of artery of one arm or leg	15	13	$177.00	$84.89
36589 Removal of central venous catheter for infusion	13	12	$296.00	$137.20
35301 Removal of blood clot and portion of artery of neck	12	12	$2334.00	$1115.44
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	11	11	$78.00	$36.95
47562 Removal of gallbladder using an endoscope	11	11	$1406.00	$580.32

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	399	310	$188.49	$80.67
99213 Established patient office or other outpatient visit, typically 15 minutes	235	193	$122.82	$52.31
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	153	153	$302.00	$130.09
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	86	86	$177.00	$77.74
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	57	52	$273.74	$140.99
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	52	33	$170.00	$74.42
76937 Ultrasonic guidance for blood vessel access	50	43	$89.00	$14.92
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	41	34	$29.00	$5.64
49505 Repair of groin hernia (5 years or older)	29	29	$1220.00	$506.90
75710 Radiological supervision and interpretation of imaging of artery of one arm or leg	27	22	$199.00	$87.55
35301 Removal of blood clot and portion of artery of neck	25	23	$2509.39	$1097.91
36821 Relocation of arm vein with connection to arm artery, open procedure	23	23	$1527.00	$656.37
47562 Removal of gallbladder using an endoscope	22	22	$1537.00	$661.04
36830 Connection of tube graft to vein and artery for dialysis	21	19	$1534.00	$676.22
36902 Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist	20	16	$562.00	$247.27
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	17	$185.00	$80.41
99213 Established patient office or other outpatient visit, typically 15 minutes	16	16	$120.00	$52.12
36832 Revision of dialysis graft, open procedure	16	14	$1739.00	$720.63
37224 Balloon dilation of arteries in one leg, endovascular, accessed through the skin or open procedure	15	13	$1022.00	$375.38
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	14	12	$245.00	$107.42
37221 Insertion of stents in artery in one side of groin, endovascular, accessed through the skin or open procedure	13	13	$1135.00	$381.68
35371 Removal of blood clot and portion of artery of upper thigh artery	13	13	$1868.00	$600.19

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	500	410	$184.96	$79.65
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	251	251	$298.00	$129.35
99213 Established patient office or other outpatient visit, typically 15 minutes	158	131	$121.30	$51.73
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	77	77	$176.00	$76.69
76937 Ultrasonic guidance for blood vessel access	46	38	$76.00	$14.68
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	45	43	$268.60	$138.21
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	41	28	$169.00	$73.61
49505 Repair of groin hernia (5 years or older)	38	38	$1200.00	$552.43
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	28	17	$241.00	$105.23
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	28	26	$29.00	$5.54
36821 Relocation of arm vein with connection to arm artery, open procedure	22	19	$1510.00	$655.51
36902 Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist	20	16	$559.00	$244.45
35301 Removal of blood clot and portion of artery of neck	17	15	$2559.00	$1152.02
47562 Removal of gallbladder using an endoscope	17	17	$1513.00	$661.65
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	13	13	$258.00	$112.46
37221 Insertion of stents in artery in one side of groin, endovascular, accessed through the skin or open procedure	12	12	$1128.00	$431.39
36819 Relocation of arm vein with connection to arm artery, open procedure	12	12	$1660.00	$716.25

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	460	393	$117.26	$109.08
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	304	304	$206.19	$166.74
99213 Established patient office or other outpatient visit, typically 15 minutes	220	170	$100.42	$72.88
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	57	55	$257.91	$133.76
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	50	27	$242.88	$103.75
49505 Repair of groin hernia (5 years or older)	47	47	$845.07	$519.95
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	45	45	$143.65	$107.83
36821 Relocation of arm vein with connection to arm artery, open procedure	33	28	$1532.09	$649.25
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	32	22	$168.78	$72.42
35301 Removal of blood clot and portion of artery of neck	25	24	$3667.62	$1102.22
36222 Insertion of catheter into artery on one side of neck for diagnosis or treatment including radiological supervision and interpretation	24	23	$388.29	$140.31
36902 Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist	22	19	$769.73	$238.46
36830 Connection of tube graft to vein and artery for dialysis	17	14	$1642.80	$653.01
47562 Removal of gallbladder using an endoscope	17	17	$1933.45	$657.86
37224 Balloon dilation of arteries in one leg, endovascular, accessed through the skin or open procedure	14	11	$752.78	$267.91
36901 Insertion of needle and/or catheter into dialysis circuit, with imaging including radiological supervision and interpretation	12	12	$746.00	$171.28
36589 Removal of central venous catheter for infusion	12	12	$280.80	$168.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	12	12	$183.00	$73.30
37221 Insertion of stents in artery in one side of groin, endovascular, accessed through the skin or open procedure	11	11	$755.54	$391.76
36482 Chemical destruction of incompetent vein of arm or leg, accessed through the skin using imaging guidance	11	11	$5288.95	$2368.73

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	591	467	$118.76	$108.24
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	282	282	$204.00	$167.04
99213 Established patient office or other outpatient visit, typically 15 minutes	178	130	$102.80	$70.50
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	53	25	$107.32	$73.54
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	43	43	$216.30	$138.92
93923 Complete ultrasound study of arm and leg arteries	41	40	$148.54	$77.08
36821 Relocation of arm vein with connection to arm artery, open procedure	34	32	$1533.60	$666.31
35301 Removal of blood clot and portion of artery of neck	27	25	$3670.87	$1135.80
36222 Insertion of catheter into artery on one side of neck for diagnosis or treatment including radiological supervision and interpretation	27	25	$387.04	$147.04
49505 Repair of groin hernia (5 years or older)	25	25	$852.38	$518.94
36902 Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist	24	15	$790.80	$210.21
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	20	20	$140.40	$111.53
36832 Revision of dialysis graft, open procedure	16	15	$1014.13	$736.36
36200 Insertion of catheter into aorta	15	14	$326.11	$75.04
75952 Radiological supervision and interpretation of repair of artery of abdomen procedure	14	14	$359.21	$220.87
37221 Insertion of stents in artery in one side of groin, endovascular, accessed through the skin or open procedure	13	12	$708.71	$463.43
35371 Removal of blood clot and portion of artery of upper thigh artery	13	13	$2048.55	$747.64
47562 Removal of gallbladder using an endoscope	12	12	$2024.40	$664.04
34803 Repair of bulging (aneurysm) or tear in abdominal aorta	11	11	$2389.36	$1302.99

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License CA G50664

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 - Surgical Critical Care

NUCC Taxonomy Code: 2086S0102X

State License CA G50664

A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Surgery - Trauma Surgery

NUCC Taxonomy Code: 2086S0127X

State License CA G50664

Trauma surgery is a recognized subspecialty of general surgery. Trauma surgeons are physicians who have completed a five-year general surgery residency and usually continue with a one to two year fellowship in trauma and/or surgical critical care, typically leading to additional board certification in surgical critical care. There is no trauma surgery board certification at this point. To obtain board certification in surgical critical care, a fellowship in surgical critical care or anesthesiology critical care must be completed during or after general surgery residency.

Surgery - Vascular Surgery

NUCC Taxonomy Code: 2086S0129X

State License CA G50664

A surgeon with expertise in the management of surgical disorders of the blood vessels, excluding the intracranial vessels or the heart.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

00G506640 (CA)

Hospital & Practice Group Affiliations

Enloe Medical Center

1026 Mangrove Ave, Chico, CA 959263556

Phone: 5303327144

Practice Associates & Co-Workers

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

1 Associated Practitioners

David Bristow , FNP PAC

Physician Assistant

NPI 1376568360

FNPPAC

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active April 27, 2012

NPI status registered as active in NPPES database

📍

Updated Practice Location April 27, 2012

Registered at 95 DECLARATION DR, SUITE 1, CHICO, CA 959734916 (Tel: 5303459455)

📍

Updated Business Mailing Address April 27, 2012

Registered at 95 DECLARATION DR, SUITE 1, CHICO, CA 959734916 (Tel: 5303459455)

👤

Provider Name / Credentials Updated April 27, 2012

Recorded as DENIS WESTPHAL, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 27, 2012

Surgery (License #G50664 in CA)

🟢

Initial NPI Registration & Enumeration July 31, 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: 1285640243

Entity Type:

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

Enumeration Date: July 31, 2006

Last Update: April 27, 2012

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

95 Declaration Dr, Suite 1

Chico, CA 959734916

Phone: 5303459455

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.