Active NPI 1427299973 Individual Practitioner Female Practitioner

Dr. Dorene Kay Zerfas , MD

Surgery • West Bend, WI

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Dorene Zerfas, MD is a certified Surgery practicing in West Bend, WI. With approximately 18 years of clinical experience since completing medical education in 2008, Dr. Zerfas delivers high-quality medical care to the local community at 3200 PLEASANT VALLEY RD.

Dr. Zerfas is affiliated with Ascension Medical Group-Southeast Wisconsin Inc 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, follow-up hospital inpatient care per day, established patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

3200 Pleasant Valley Rd

West Bend, WI 530959274

Telephone 2628367300

Associated Practice Facility / Clinic

🏢 Diagnostic Services Of Washington County Sc Facility NPI 1639145576

Medicare Profile & Education

Medical School

Other

Graduation Year

2008

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in West Bend, WI

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

18 Yrs -11.7 yrs vs City Avg

City Avg: 29.7 Yrs

State Avg: 25.2 Yrs

Regional Practice Density

3 Specialists

Practicing in West Bend, WI (765 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

64.3% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Zerfas (18 Years) 18 Yrs

West Bend Specialty Average (29.7 Years) 29.7 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	32	17	$191.63	$72.91
99231 Follow-up hospital inpatient care per day, typically 15 minutes	22	14	$102.05	$45.46
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	13	$278.63	$116.20
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	15	15	$421.20	$146.19
99221 Initial hospital inpatient care per day, typically 30 minutes	14	14	$262.50	$75.54
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	13	13	$358.69	$120.42

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	57	26	$182.63	$75.61
99213 Established patient office or other outpatient visit, typically 15 minutes	24	12	$183.25	$86.50
99231 Follow-up hospital inpatient care per day, typically 15 minutes	22	16	$98.73	$46.97
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	22	22	$413.64	$155.02
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	20	20	$346.20	$123.90
99221 Initial hospital inpatient care per day, typically 30 minutes	13	12	$252.15	$78.25

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	28	13	$180.44	$67.56
99231 Follow-up hospital inpatient care per day, typically 15 minutes	12	11	$104.33	$36.59

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	51	20	$166.81	$68.97
99231 Follow-up hospital inpatient care per day, typically 15 minutes	33	15	$90.47	$36.95
99221 Initial hospital inpatient care per day, typically 30 minutes	19	19	$233.11	$95.68

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	25	13	$173.63	$71.20
99221 Initial hospital inpatient care per day, typically 30 minutes	14	14	$253.11	$98.85

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	34	14	$192.00	$68.97
99231 Follow-up hospital inpatient care per day, typically 15 minutes	34	17	$104.00	$37.23
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	25	18	$117.28	$42.17
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$282.00	$97.55
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	13	$364.79	$130.02

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	39	20	$191.72	$69.10
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	36	20	$112.53	$41.06
99231 Follow-up hospital inpatient care per day, typically 15 minutes	32	16	$103.91	$37.12
99213 Established patient office or other outpatient visit, typically 15 minutes	29	27	$192.48	$68.67
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	26	23	$361.77	$129.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	17	17	$281.53	$100.66
99202 New patient office or other outpatient visit, typically 20 minutes	14	14	$197.14	$70.17

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	77	34	$175.00	$68.86
99231 Follow-up hospital inpatient care per day, typically 15 minutes	58	26	$95.00	$37.31
99213 Established patient office or other outpatient visit, typically 15 minutes	35	29	$175.00	$68.73
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	30	29	$331.00	$130.13
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	29	29	$257.00	$99.70
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	25	18	$104.00	$40.77
99202 New patient office or other outpatient visit, typically 20 minutes	16	16	$178.00	$70.20
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	12	$490.00	$192.75

Medical Specialties & State Licenses

CMS Verified: 2026-07-08

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License IN 01076316A

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 NY 270530

Surgery

NUCC Taxonomy Code: 208600000X

State License WI 71608-20

Hospital & Practice Group Affiliations

Ascension Medical Group-Southeast Wisconsin Inc

3237 S 16th St, Milwaukee, WI 532154526

Phone: 8554763428

Ascension Medical Group-Southeast Wisconsin Inc

10101 S 27th St, Franklin, WI 531327209

Phone: 4143254700

Ascension Medical Group-Southeast Wisconsin Inc

3237 S 16th St, Milwaukee, WI 532154526

Phone: 4146475069

Ascension Medical Group-Southeast Wisconsin Inc

201 N Mayfair Rd, Wauwatosa, WI 532264216

Practice Associates & Co-Workers

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

40 Associated Practitioners

Matthew Mueller , CRNA

Nurse Anesthetist, Certified Registered

NPI 1013394717

Certified Registered Nurse Anesthetist

Jennifer Reppas , PA-C

Physician Assistant - Surgical

NPI 1033667688

Physician Assistant (Certified)

Dr. Janet Goldman , MD

Obstetrics & Gynecology

NPI 1063438109

Doctor of Medicine (M.D.)

Kari Chakrabarti , CRNA

Nurse Anesthetist, Certified Registered

NPI 1063920734

Certified Registered Nurse Anesthetist

Kristen Burg , APNP, CRNA

Nurse Anesthetist, Certified Registered

NPI 1073920708

Advanced Practice Nurse Prescriber, Certified Registered Nurse Anesthetist

Dr. Raman Khanna , MD

Internal Medicine - Gastroenterology

NPI 1083645410

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

9 Historical Events

📍

Updated Practice Location July 08, 2026

Registered at 3200 PLEASANT VALLEY RD, WEST BEND, WI 530959274 (Tel: 2628367300)

📍

Updated Business Mailing Address July 08, 2026

Registered at 3200 PLEASANT VALLEY RD, WEST BEND, WI 530959274 (Tel: 2628367300)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2026

Surgery (License #270530 in NY)

✅

NPI Profile Active June 03, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location June 03, 2016

Registered at 901 LINCOLNWAY, SUITE 304, LA PORTE, IN 463503430 (Tel: 2193628523)

📍

Updated Business Mailing Address June 03, 2016

Registered at 901 LINCOLNWAY, SUITE 304, LA PORTE, IN 463503430 (Tel: 2193628523)

👤

Provider Name / Credentials Updated June 03, 2016

Recorded as DORENE ZERFAS, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 03, 2016

Surgery (License #01076316A in IN)

🟢

Initial NPI Registration & Enumeration March 12, 2009

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: 1427299973

Entity Type:

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

Enumeration Date: March 12, 2009

Last Update: July 08, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

3200 Pleasant Valley Rd

West Bend, WI 530959274

Phone: 2628367300

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.