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DR. MASON LEE DONNELL PHD, PA
NPI 1891417390
Physician Assistant in San Rafael, CA

Active since September 13, 2022PECOS Enrolled
4000 CIVIC CENTER DR, SAN RAFAEL, CA 94903(415) 492-3333 Get Directions Write a Review

NPPES record last updated: March 7, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 7, 2026, Sep 13, 2022 (2 updates tracked since 2022).

About Dr. Mason Lee Donnell Phd, Pa NPPES

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

DR. MASON LEE DONNELL PHD, PA (NPI 1891417390) is an individual physician assistant in San Rafael, California, licensed in California (62685) and active in the NPI registry since September 2022. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891417390
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameDR. MASON LEE DONNELLCredential: PHD, PA
Location Address4000 CIVIC CENTER DRSan Rafael, CA 94903-4171
Mailing Address1141 Pear Tree Ln Ste 100Napa, CA 94558-6485 · (707) 254-1770
Phone(415) 492-3333
Sole ProprietorYes
Enumeration DateSeptember 13, 2022
Last NPPES UpdateMarch 7, 20262 updates tracked since enumeration
NPPES CertifiedMarch 7, 2026
✔ NPI 1891417390 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in CA · 62685
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
4000 CIVIC CENTER DR, San Rafael, CA 94903
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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)

Dr. Mason Lee Donnell Phd, Pa 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94903 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
$104.67 typical visit price
range $69.07 – $202.63
Typical copayment $26.16 (range $17.26 – $50.65)
Most-billed visit code 99203
Established Patient
$85.00 typical visit price
range $23.44 – $166.64
Typical copayment $21.25 (range $5.86 – $41.66)
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.

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.

MIRANDA MINH-HAN NGUYEN
Physician Assistant
4000 CIVIC CENTER DR
SAN RAFAEL, CA 94903
Marin County (415) 492-3333
DANIEL J. SOLOMON, MD INC
Orthopaedic Surgery (Sports Medicine)
4000 CIVIC CENTER DR, SUITE 205
SAN RAFAEL, CA 94903
Marin County (415) 492-1600
DR. CRIZELDA LAURON O.D.
Optometrist
4000 CIVIC CENTER DR, SUITE 200A
SAN RAFAEL, CA 94903
Marin County (415) 444-0300
SHELLEY A PALFY MD
Pediatrics
4000 CIVIC CENTER DR, #205
SAN RAFAEL, CA 94903
Marin County (415) 479-7244
ESTEFANY GUTIERREZ
Behavior Technician
4000 CIVIC CENTER DR
SAN RAFAEL, CA 94903
Marin County (628) 877-0040
KURT HOYT KUNZEL MD
Emergency Medicine
4000 CIVIC CENTER DR
SAN RAFAEL, CA 94903
Marin County (209) 342-2300
RAJDEEP SINGH FNP
Nurse Practitioner (Family)
4000 CIVIC CENTER DR, SUITE 200
SAN RAFAEL, CA 94903
Marin County (415) 492-3333
PRIMA MEDICAL GROUP, INC.
Non-Pharmacy Dispensing Site
4000 CIVIC CENTER DR, 200
SAN RAFAEL, CA 94903
Marin County (415) 492-3333

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 Mason Donnell's NPI number?

The NPI number for Mason Donnell is 1891417390. It was assigned to this individual provider in the NPPES registry on September 13, 2022.

Where is Mason Donnell located?

Mason Donnell practices at 4000 Civic Center Dr, San Rafael, CA 94903. The listed phone number is (415) 492-3333.

What is Mason Donnell's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Mason Donnell enrolled in Medicare?

Yes. Mason Donnell is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mason Donnell was last updated on March 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.