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

MARK RYAN HERMANN
NPI 1851035919
Anesthesiology in Ventura, CA

Q: What is Mark Hermann's NPI number?

The NPI number for Mark Hermann is 1851035919. It was assigned to this individual provider in the NPPES registry on April 25, 2022.

Q: What is Mark Hermann's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Mark Hermann was last updated on July 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 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.

Active since April 25, 2022PECOS Enrolled

147 N BRENT ST, VENTURA, CA 93003(805) 948-5011 Get Directions Write a Review

NPPES record last updated: July 6, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 6, 2026, Apr 25, 2022 (2 updates tracked since 2022).

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About Mark Ryan Hermann NPPES

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

MARK RYAN HERMANN (NPI 1851035919) is an individual anesthesiology provider in Ventura, California, licensed in California (A206399) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1851035919

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameMARK RYAN HERMANN

Location Address147 N BRENT STVentura, CA 93003-2854

Mailing Address147 N Brent StVentura, CA 93003-2809 · (805) 948-5011

Phone(805) 948-5011

Sole ProprietorNo

Enumeration DateApril 25, 2022

Last NPPES UpdateJuly 6, 20262 updates tracked since enumeration

NPPES CertifiedJuly 6, 2026

✔ NPI 1851035919 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in CA · A206399

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.

147 N BRENT ST, Ventura, CA 93003

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Ryan Hermann is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

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.

DR. DANIEL BLAINE ASAY M.D.

Anesthesiology