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DR. MARY JEAN SHIMANE DMD
NPI 1851848196
Dentist in Castro Valley, CA

Active since September 02, 2016PECOS Enrolled
20099 REDWOOD RD, CASTRO VALLEY, CA 94546(510) 881-1611 Get Directions Write a Review

NPPES record last updated: September 2, 2016. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Mary Jean Shimane Dmd NPPES

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

DR. MARY JEAN SHIMANE DMD (NPI 1851848196) is an individual dentist in Castro Valley, California, licensed in California (46564) and active in the NPI registry since September 2016. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1851848196
Entity TypeIndividualFemale
Primary Taxonomy122300000X
Provider Legal NameDR. MARY JEAN SHIMANECredential: DMD
Location Address20099 REDWOOD RDCastro Valley, CA 94546-4326
Mailing Address20099 Redwood RdCastro Valley, CA 94546-4326 · (510) 881-1611
Phone(510) 881-1611
Sole ProprietorNo
Enumeration DateSeptember 2, 2016
✔ NPI 1851848196 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers
Taxonomy Code122300000X
License✔ Licensed in CA · 46564
Definition
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
20099 REDWOOD RD, Castro Valley, CA 94546
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mary Jean Shimane Dmd 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 Mary Shimane reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The Davis Street Community Center Incorporated
4.4 mi
Federally Qualified Health Center (FQHC)
3081 TEGARDEN
San Leandro, CA 94577
  • Reassigned Medicare billing, California enrollment
  • 42 clinicians in this Medicare group
NPI 1215358924 (510) 347-4620

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 94546 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
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 3

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

BRUCE AHTYE DDS
Clinic/Center (Dental)
20099 REDWOOD RD
CASTRO VALLEY, CA 94546
Alameda County (510) 881-1611
JOHN M NAKHLA DDS, INC
Dentist (General Practice)
20099 REDWOOD RD
CASTRO VALLEY, CA 94546
Alameda County (510) 881-1611
DR. BRUCE A. AHTYE D.D.S.
Dentist (General Practice)
20099 REDWOOD RD
CASTRO VALLEY, CA 94546
Alameda County (510) 881-1611

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 Mary Shimane's NPI number?

The NPI number for Mary Shimane is 1851848196. It was assigned to this individual provider in the NPPES registry on September 2, 2016.

Where is Mary Shimane located?

Mary Shimane practices at 20099 Redwood Rd, Castro Valley, CA 94546. The listed phone number is (510) 881-1611.

What is Mary Shimane's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Is Mary Shimane enrolled in Medicare?

Yes. Mary Shimane is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mary Shimane's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Shimane reassigns Medicare benefits to The Davis Street Community Center Incorporated (San Leandro, 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 Mary Shimane'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 Mary Shimane was last updated on September 2, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.