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MARK DRUCKER MD
NPI 1699753046
Ophthalmology in Walnut Creek, CA

Active since January 05, 2006PECOS Enrolled
1855 SAN MIGUEL DR, #28, WALNUT CREEK, CA 94596(925) 935-4978(925) 935-9542 Get Directions Write a Review

NPPES record last updated: May 16, 2008. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mark Drucker Md NPPES

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

MARK DRUCKER MD (NPI 1699753046) is an individual ophthalmology provider in Walnut Creek, California, licensed in California (G0045173) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1699753046
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameMARK DRUCKERCredential: MD
Location Address1855 SAN MIGUEL DR, #28Walnut Creek, CA 94596-5214
Mailing Address1855 San Miguel Dr, #28Walnut Creek, CA 94596-5214 · (925) 935-4978 · Fax (925) 935-9542
Phone(925) 935-4978
Fax(925) 935-9542
Sole ProprietorYes
Enumeration DateJanuary 5, 2006
Last NPPES UpdateMay 16, 2008
✔ NPI 1699753046 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · G0045173
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
1855 SAN MIGUEL DR, Walnut Creek, CA 94596
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Other Identifiers 3

Medicare UPINA49920
Medicare ID-Type UnspecifiedOOG451730CA
MedicaidOOG451730CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Drucker Md 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.

Medicare Billing Reassignment

Medicare enrollment records show Mark Drucker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

John Muir Trauma Physicians Billing Service
1.4 mi
Hospitalist
1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598
  • Reassigned Medicare billing, California enrollment
  • 810 clinicians in this Medicare group
NPI 1093864837 (925) 947-5331

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94596 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.

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. ADAM CHARLES MARRE MD, DDS
Oral & Maxillofacial Surgery
1855 SAN MIGUEL DR, STE 25
WALNUT CREEK, CA 94596
Contra Costa County (925) 934-5565
JOSEPH F BARAKEH DO PHD
Ophthalmology
1855 SAN MIGUEL DR, #28
WALNUT CREEK, CA 94596
Contra Costa County (925) 935-4978
DR. BOBBY GLENN AYCOCK M.D.
Plastic Surgery
1855 SAN MIGUEL DR, SUITE 4
WALNUT CREEK, CA 94596
Contra Costa County (925) 937-8377
DR. ALEXIS SMITH PSY.D.
Psychologist (Clinical)
1855 SAN MIGUEL DR, STE 23
WALNUT CREEK, CA 94596
Contra Costa County (925) 324-1593
MICHELLE MASUDA DDS, MSD
Dentist (Orthodontics and Dentofacial Orthopedics)
1855 SAN MIGUEL DR, #22
WALNUT CREEK, CA 94596
Contra Costa County (925) 934-3583
ALEX RADER DDS INC
Dentist
1855 SAN MIGUEL DR, STE 12
WALNUT CREEK, CA 94596
Contra Costa County (925) 932-1855
WALNUT CREEK OPTICAL
Eyewear Supplier
1855 SAN MIGUEL DR, #27A
WALNUT CREEK, CA 94596
Contra Costa County (925) 935-8822
MARK R. MAHER DDS, INC.
Clinic/Center (Dental)
1855 SAN MIGUEL DR, SUITE 1
WALNUT CREEK, CA 94596
Contra Costa County (925) 935-1159

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 Mark Drucker's NPI number?

The NPI number for Mark Drucker is 1699753046. It was assigned to this individual provider in the NPPES registry on January 5, 2006.

Where is Mark Drucker located?

Mark Drucker practices at 1855 San Miguel Dr #28, Walnut Creek, CA 94596. The listed phone number is (925) 935-4978.

What is Mark Drucker's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Mark Drucker enrolled in Medicare?

Yes. Mark Drucker is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Drucker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Drucker reassigns Medicare benefits to John Muir Trauma Physicians Billing Service (Walnut Creek, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Drucker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Drucker was last updated on May 16, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.