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NICHOLAS H. MAST MD
NPI 1932399698
Orthopaedic Surgery in Novato, CA

Active since July 30, 2007Opted out of Medicare · through Jul 1, 2028
100 ROWLAND WAY STE 200, NOVATO, CA 94945(415) 530-5330(415) 530-5333 Get Directions Write a Review

NPPES record last updated: January 9, 2023. Verified against the NPPES registry weekly; last sync: September 13, 2026.

Record update history: Jan 9, 2023, Jun 13, 2019 (2 updates tracked since 2019).

About Nicholas H. Mast Md NPPES

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

NICHOLAS H. MAST MD (NPI 1932399698) is an individual orthopaedic surgery provider in Novato, California, licensed in California (A98951) and active in the NPI registry since July 2007. He has opted out of Medicare through July 1, 2028 and remains eligible to order and refer and maintains a secondary practice location in San Francisco.

NPPES Registry Identity

NPI1932399698
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameNICHOLAS H. MASTCredential: MD
Location Address100 ROWLAND WAY STE 200Novato, CA 94945-5041
Mailing Address8 Alpine Lily PlSan Rafael, CA 94903-1090 · (415) 530-5330
Phone(415) 530-5330
Fax(415) 530-5333
Sole ProprietorYes
Enumeration DateJuly 30, 2007
Last NPPES UpdateJanuary 9, 20232 updates tracked since enumeration
NPPES CertifiedJanuary 9, 2023
✔ NPI 1932399698 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
Licenses✔ Licensed in CA · A98951✔ Licensed in NV · 12254✔ Licensed in UT · 5401485-1205✔ Licensed in CO · DR.0061770
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
100 ROWLAND WAY STE 200, Novato, CA 94945
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Secondary Practice Location 1

Location 12250 Hayes St Ste 208San Francisco, CA 94117 · Phone (415) 530-5330 · Fax (415) 530-5333

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Nicholas H. Mast Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 1, 2022 through July 1, 2028.

Opt-Out Effective DateJuly 1, 2022
Opt-Out In Effect ThroughJuly 1, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94945 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.

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.

Cane, includes canes of all materials, adjustable or fixed, with tip E0100
DME-Other DME · category DE000N
1 supplier14 claims14 services$19.43 avg. paid by Medicare
Walker, folding, wheeled, adjustable or fixed height E0143
DME-Other DME · category DE000N
2 suppliers55 claims55 services$44.35 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 3

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

NICHOLAS H. MAST, M.D., INC.
Orthopaedic Surgery
100 ROWLAND WAY STE 200
NOVATO, CA 94945
Marin County (415) 530-5330
NOAH D. WEISS, MD INC
Orthopaedic Surgery
100 ROWLAND WAY STE 200
NOVATO, CA 94945
Marin County (707) 935-5600
PAIN MEDICINE CONSULTANTS
Non-Pharmacy Dispensing Site
100 ROWLAND WAY STE 200
NOVATO, CA 94945
Marin County (415) 878-0255

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 Mast's NPI number?

The NPI number for Nicholas Mast is 1932399698. It was assigned to this individual provider in the NPPES registry on July 30, 2007.

Where is Nicholas Mast located?

Nicholas Mast practices at 100 Rowland Way Ste 200, Novato, CA 94945. The listed phone number is (415) 530-5330.

What is Nicholas Mast's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Nicholas Mast enrolled in Medicare?

No. Nicholas Mast has opted out of Medicare through July 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Nicholas Mast was last updated on January 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.