Active NPI 1962457903 Individual Practitioner Male Practitioner

Dr. William Robert Corn , MD

Neurological Surgery • San Francisco, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. William Corn, MD is a certified Neurological Surgery practicing in San Francisco, CA. With approximately 38 years of clinical experience since graduating from Eastern Virginia Medical School in 1988, Dr. Corn delivers high-quality medical care to the local community at 1001 POTRERO AVE.

Dr. Corn maintains professional affiliations with University Of California Sfgh Medical Group, City And County Of San Francisco and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, initial hospital care with moderate level of medical decision making, if using time, at least, subsequent hospital care with moderate levelof medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1001 Potrero Ave
Rm 4m62

San Francisco, CA 941103518

Telephone 4152064353

Fax 4154765582

Associated Practice Facility / Clinic

🏢 University Of California Sfgh Medical Group Facility NPI 1174598296

Medicare Profile & Education

Medical School

Eastern Virginia Medical School

Graduation Year

1988

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Neurological Surgery in San Francisco, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

38 Yrs +20.1 yrs vs City Avg

City Avg: 17.9 Yrs

State Avg: 26.2 Yrs

Regional Practice Density

80 Specialists

Practicing in San Francisco, CA (999 Statewide)

Telehealth Adoption Rate

50.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

80.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Corn (38 Years) 38 Yrs

San Francisco Specialty Average (17.9 Years) 17.9 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	54	38	$712.00	$111.29
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	11	11	$822.00	$194.07

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	30	24	$679.27	$110.71
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	25	12	$563.00	$134.84
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	16	16	$1057.38	$162.99
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	14	$616.00	$147.01
95886 Needle measurement of electrical activity in arm or leg muscles, complete study	15	13	$213.00	$52.30

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	54	40	$653.79	$110.47
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	36	11	$330.00	$78.34
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	33	27	$1008.74	$164.26
95886 Needle measurement of electrical activity in arm or leg muscles, complete study	16	15	$213.00	$51.75

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	67	22	$331.00	$80.27
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	32	32	$923.00	$165.10
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	22	22	$673.27	$111.91

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	109	31	$326.00	$82.05
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	17	17	$914.00	$227.68
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	14	14	$692.00	$126.14
99238 Hospital discharge day management, 30 minutes or less	12	12	$330.00	$84.21

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	55	46	$299.73	$10.32
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	23	11	$328.87	$81.18
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	20	18	$692.00	$123.66
95886 Needle measurement of electrical activity in arm or leg muscles, complete study	18	17	$211.00	$53.15
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	17	17	$618.06	$151.65

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	79	51	$295.06	$9.97
64612 Injection of chemical for paralysis of nerve muscles on side of face	34	18	$539.00	$139.84
95886 Needle measurement of electrical activity in arm or leg muscles, complete study	24	19	$211.00	$51.30
64616 Injection of chemical for paralysis of nerve muscles on side of neck excluding voice box	21	11	$510.00	$66.14

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	78	19	$326.00	$74.64
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	57	42	$278.11	$9.57
64612 Injection of chemical for paralysis of nerve muscles on side of face	22	11	$537.18	$138.75
95886 Needle measurement of electrical activity in arm or leg muscles, complete study	18	18	$209.83	$49.29
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	11	11	$619.00	$140.66

Medical Specialties & State Licenses

Neurological Surgery Primary Specialty

NUCC Taxonomy Code: 207T00000X

State License CA G68193

A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

Psychiatry & Neurology - Neurology

NUCC Taxonomy Code: 2084N0400X

State License CA G68193

A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

00G681930 (CA)

Hospital & Practice Group Affiliations

University Of California Sfgh Medical Group

1001 Potrero Ave, San Francisco, CA 941103518

University Of California Sfgh Medical Group

1001 Potrero Ave Bldg 80 Ward 83, San Francisco, CA 941103518

Phone: 6282068610

City And County Of San Francisco

1001 Potrero Ave, San Francisco, CA 941103518

Phone: 4152062305

Practice Associates & Co-Workers

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

4 Associated Practitioners

Dr. Cheryl Jay , MD

Psychiatry & Neurology - Neurology

NPI 1225082274

Doctor of Medicine (M.D.)

Dr. Richard Price , MD

Psychiatry & Neurology - Neurology

NPI 1497709109

Doctor of Medicine (M.D.)

Dr. David Bonovich , MD

Psychiatry & Neurology - Neurology

NPI 1518078443

Doctor of Medicine (M.D.)

Dr. Jesse Claude Hemphill , MD

Psychiatry & Neurology - Neurology

NPI 1811942568

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 1001 POTRERO AVE, RM 4M62, SAN FRANCISCO, CA 941103518 (Tel: 4152064353)

📍

Updated Business Mailing Address July 08, 2007

Registered at PO BOX 7464, SAN FRANCISCO, CA 941207464 (Tel: 4152063103)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as WILLIAM CORN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Neurological Surgery (License #G68193 in CA)

🟢

Initial NPI Registration & Enumeration May 24, 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: 1962457903

Entity Type:

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

Enumeration Date: May 24, 2006

Last Update: July 13, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 7464

San Francisco, CA 941207464

Phone: 4152063103

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.