Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM ROBERT CORN MD
NPI 1962457903
Neurological Surgery in San Francisco, CA

Active since May 24, 2006PECOS Enrolled
91.85/100
CMS Quality Rating
1001 POTRERO AVE, RM 4M62, SAN FRANCISCO, CA 94110(415) 206-4353(415) 476-5582 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About William Robert Corn Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM ROBERT CORN MD (NPI 1962457903) is an individual neurological surgery provider in San Francisco, California, licensed in California (G68193) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Eastern Virginia Medical School (1988).

NPPES Registry Identity

NPI1962457903
Entity TypeIndividualMale
Primary Taxonomy207T00000X
Provider Legal NameWILLIAM ROBERT CORNCredential: MD
Location Address1001 POTRERO AVE, RM 4M62San Francisco, CA 94110-3518
Mailing AddressPo Box 7464San Francisco, CA 94120-7464 · (415) 206-3103 · Fax (415) 206-3872
Fax(415) 476-5582
Sole ProprietorNo
Medical School CMSEastern Virginia Medical SchoolGraduated 1988
Enumeration DateMay 24, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
NPI 1962457903 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
License Licensed in CA · G68193
Definition
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.
Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X · License G68193 (CA)
1001 POTRERO AVE, San Francisco, CA 94110

Other Identifiers 1

Medicaid00G681930CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

William Robert Corn Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4183798382
PECOS Enrollment IDI20080806000539
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
54 services38 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.85/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality83.53
Promoting Interoperability100
Improvement Activities40
Cost68.01

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Dynamic adjustable elbow extension/flexion device, includes soft interface material E1800
DME-Other DME · category DE000N
1 supplier11 claims11 services$92.94 avg. paid by Medicare
Dynamic adjustable wrist extension / flexion device, includes soft interface material E1805
DME-Other DME · category DE000N
1 supplier11 claims11 services$99.89 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Registered Nurse
1001 POTRERO AVE, ZSFG BUILDING 90 4TH FLOOR
SAN FRANCISCO, CA 94110
Student in an Organized Health Care Education/Training Program
1001 POTRERO AVE, BLDG 10, 3RD FLOOR, WARD 13 BOX 1364
SAN FRANCISCO, CA 94110
Student in an Organized Health Care Education/Training Program
1001 POTRERO AVE
SAN FRANCISCO, CA 94110
Case Manager/Care Coordinator
1001 POTRERO AVE
SAN FRANCISCO, CA 94110
Counselor
1001 POTRERO AVE
SAN FRANCISCO, CA 94110
Nurse Practitioner (Family)
1001 POTRERO AVE
SAN FRANCISCO, CA 94110
Clinical Medical Laboratory
1001 POTRERO AVE, BLDG 100, RM 104
SAN FRANCISCO, CA 94110
Internal Medicine
1001 POTRERO AVE, 1M
SAN FRANCISCO, CA 94110

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Corn's NPI number?

The NPI number for William Corn is 1962457903. It was assigned to this individual provider in the NPPES registry on May 24, 2006.

Where is William Corn located?

William Corn practices at 1001 Potrero Ave Rm 4m62, San Francisco, CA 94110. The listed phone number is (415) 206-4353.

What is William Corn's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is William Corn enrolled in Medicare?

Yes. William Corn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for William Corn was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.