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

NICHOLAS P LYON
NPI 1083233704
Anesthesiology in San Francisco, CA

Active since April 13, 2020PECOS EnrolledAccepts Medicare Assignment
521 PARNASSUS AVE, SAN FRANCISCO, CA 94143(415) 476-9035 Get Directions Write a Review

NPPES record last updated: August 4, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 4, 2026, Apr 10, 2026, Jun 10, 2024 and 1 more (4 updates tracked since 2020).

About Nicholas P Lyon NPPES

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

NICHOLAS P LYON (NPI 1083233704) is an individual anesthesiology provider in San Francisco, California, licensed in California (A210532) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Mchenry, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2020).

NPPES Registry Identity

NPI1083233704
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameNICHOLAS P LYON
Location Address521 PARNASSUS AVESan Francisco, CA 94143-2206
Mailing Address24w241 Kammes DrNaperville, IL 60540-9560
Phone(415) 476-9035
Sole ProprietorYes
Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 2020
Enumeration DateApril 13, 2020
Last NPPES UpdateAugust 4, 20264 updates tracked since enumeration
NPPES CertifiedAugust 4, 2026
✔ NPI 1083233704 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A210532
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
521 PARNASSUS AVE, San Francisco, CA 94143
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona.Insurance ›

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

Nicholas P Lyon 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 ID7911449434
PECOS Enrollment IDI20240611003923, I20250616002591
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 3

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.

Anesthesia for procedure for total knee joint replacement 01402
Anesthesia for a total knee joint replacement numbs your body to eliminate pain during surgery. This could be general anesthesia where you're unconscious, or regional anesthesia where only the leg is numb. It's administered by a specialist, ensuring safety and comfort.
17 services17 patients
Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447
This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.
16 services16 patients
Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
14 services14 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northwestern Medicine Mchenry

Acute Care Hospitals · Mchenry, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140116
Location4201 Medical Center DriveMchenry, IL 60050 · Mc Henry County
Emergency services Birthing friendly

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.

KIRSTEN RITTENBACH DDS, MD
Oral & Maxillofacial Surgery
521 PARNASSUS AVE, C-522
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-8226
AMY WEINBERG MD
Hospitalist
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1000
ASHISH RAMANLAL GANDHI
Hospitalist
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-1378
LIANA VALEANU MD
Anesthesiology
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-7952
JULIN F TANG MD
Anesthesiology
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-9035
DR. BINBIN WANG M.D.
Anesthesiology
521 PARNASSUS AVE, RM C-450
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-3235
CHRISTINE V BORROMEO PHARM.D
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-1335
DR. CARLSON MATHIAS NGWABIFU ASANGHANWA
Anesthesiology
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-1043

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 Nicholas Lyon's NPI number?

The NPI number for Nicholas Lyon is 1083233704. It was assigned to this individual provider in the NPPES registry on April 13, 2020.

Where is Nicholas Lyon located?

Nicholas Lyon practices at 521 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 476-9035.

What is Nicholas Lyon's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Nicholas Lyon enrolled in Medicare?

Yes. Nicholas Lyon 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.

What insurance does Nicholas Lyon accept?

Health plans from Blue Cross Blue Shield of Arizona list Nicholas Lyon as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Nicholas Lyon affiliated with any hospitals?

According to CMS data, Nicholas Lyon is affiliated with Northwestern Medicine Mchenry.

When was this NPI record last updated?

The NPPES record for Nicholas Lyon was last updated on August 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.