Active NPI 1619960705 Individual Practitioner Male Practitioner

Dr. William Ang Lee , MD

Internal Medicine • Simi Valley, CA

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. William Lee, MD is a certified Internal Medicine practicing in Simi Valley, CA. With approximately 25 years of clinical experience since completing medical education in 2001, Dr. Lee delivers high-quality medical care to the local community at 2755 ALAMO ST STE 101.

Dr. Lee is affiliated with Simi Medical Group, Inc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, advance care planning, first. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

2755 Alamo St Ste 101

Simi Valley, CA 93065

Telephone 8187261930

Fax 8188781563

Associated Practice Facility / Clinic

🏢 Simi Medical Group, Inc Facility NPI 1346768025

Medicare Profile & Education

Medical School

Other

Graduation Year

2001

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Simi Valley, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

25 Yrs +1.1 yrs vs City Avg

City Avg: 23.9 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

26 Specialists

Practicing in Simi Valley, CA (18502 Statewide)

Telehealth Adoption Rate

34.6% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

40.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Lee (25 Years) 25 Yrs

Simi Valley Specialty Average (23.9 Years) 23.9 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
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	325	130	$215.00	$135.88
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	56	56	$220.98	$138.32
99497 Advance care planning, first 30 minutes	16	16	$140.00	$85.55
G0008 Administration of influenza virus vaccine	15	15	$50.00	$34.54
99213 Established patient office or other outpatient visit, typically 15 minutes	13	11	$150.00	$78.95
90661 Influenza vaccine, trivalent derived from cell cultures	11	11	$80.00	$36.11

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	320	156	$215.00	$128.50
99213 Established patient office or other outpatient visit, typically 15 minutes	58	55	$150.00	$91.84
99497 Advance care planning, first 30 minutes	41	41	$140.00	$80.00
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	40	40	$219.50	$126.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$275.00	$169.39
G0008 Administration of influenza virus vaccine	12	12	$50.00	$30.08

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	265	123	$215.00	$139.21
99213 Established patient office or other outpatient visit, typically 15 minutes	134	93	$150.00	$98.41
99497 Advance care planning, first 30 minutes	54	54	$140.00	$90.22
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	46	46	$220.00	$142.46
G0008 Administration of influenza virus vaccine	21	21	$46.67	$32.52
93000 Routine ekg using at least 12 leads including interpretation and report	18	17	$25.00	$15.78
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$275.00	$181.76
90756 Vaccine for influenza for injection into muscle	15	15	$45.00	$29.97

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	263	132	$214.16	$142.30
99213 Established patient office or other outpatient visit, typically 15 minutes	122	84	$149.67	$100.55
99497 Advance care planning, first 30 minutes	43	43	$140.00	$91.72
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	38	38	$220.00	$145.39
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	21	21	$30.00	$19.91
G0008 Administration of influenza virus vaccine	21	21	$30.00	$19.10
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$275.00	$182.92
93000 Routine ekg using at least 12 leads including interpretation and report	12	12	$25.00	$16.47

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	223	107	$180.63	$119.33
99213 Established patient office or other outpatient visit, typically 15 minutes	79	54	$130.25	$82.83
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	41	41	$208.29	$127.39
G0008 Administration of influenza virus vaccine	18	18	$47.78	$18.75
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	18	18	$30.00	$18.89
99497 Advance care planning, first 30 minutes	14	14	$140.00	$92.45

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	323	133	$180.00	$118.03
99213 Established patient office or other outpatient visit, typically 15 minutes	56	46	$130.00	$80.84
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	29	29	$205.17	$126.40
G0008 Administration of influenza virus vaccine	26	24	$49.62	$18.43
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	26	24	$30.00	$17.48

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	208	103	$94.04	$78.63
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	197	105	$167.44	$116.45
G0008 Administration of influenza virus vaccine	30	30	$48.51	$22.97
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	26	26	$158.89	$122.80
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	24	24	$30.00	$17.48
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	12	12	$55.00	$47.72
93000 Routine ekg using at least 12 leads including interpretation and report	11	11	$33.09	$18.65

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	222	124	$90.00	$79.33
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	69	52	$135.00	$116.75
G0008 Administration of influenza virus vaccine	19	17	$27.71	$27.16
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	16	16	$55.00	$48.01
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	16	16	$123.66	$121.19
G0009 Administration of pneumococcal vaccine	13	13	$27.03	$26.49
Q2039 Influenza virus vaccine, not otherwise specified	12	12	$30.00	$22.33
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	11	11	$69.00	$67.62

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA C50628

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Hospital & Practice Group Affiliations

Simi Medical Group, Inc

2755 Alamo St, Simi Valley, CA 930651311

Phone: 8052107280

Secondary Practice Locations

2950 Sycamore Dr, Ste 300

Simi Valley, CA 930651210

Phone: 8055260226

Practice Associates & Co-Workers

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

3 Associated Practitioners

Kelly Stephens , RN, NP

Nurse Practitioner

NPI 1144543695

Registered Nurse, Nurse Practitioner

Dr. Deepa Reddy , MD

Family Medicine

NPI 1609929397

Doctor of Medicine (M.D.)

Mine Moosakhanian , FNP-C

Nurse Practitioner - Primary Care

NPI 1881310761

Family Nurse Practitioner (Certified)

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Practice Location July 11, 2018

Registered at 2755 ALAMO ST STE 101, SIMI VALLEY, CA 93065 (Tel: 8187261930)

📍

Updated Business Mailing Address July 11, 2018

Registered at 2755 ALAMO ST STE 101, SIMI VALLEY, CA 930651311 (Tel: 8187261930)

✅

NPI Profile Active May 30, 2008

NPI status registered as active in NPPES database

📍

Updated Practice Location May 30, 2008

Registered at 2950 SYCAMORE DR, STE 300, SIMI VALLEY, CA 930651210 (Tel: 8055260226)

📍

Updated Business Mailing Address May 30, 2008

Registered at 26850 PROVENCE DR, CALABASAS, CA 913023820 (Tel: 8187261930)

👤

Provider Name / Credentials Updated May 30, 2008

Recorded as WILLIAM LEE, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 30, 2008

Internal Medicine (License #C50628 in CA)

🟢

Initial NPI Registration & Enumeration August 24, 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: 1619960705

Entity Type:

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

Enumeration Date: August 24, 2005

Last Update: July 11, 2018

Sole Proprietor: No

Update or Correct Profile

Mailing Address

2755 Alamo St Ste 101

Simi Valley, CA 930651311

Phone: 8187261930

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.