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MARY CATHERINE WASHBURN M.D.
NPI 1225203169
Obstetrics & Gynecology in Garden Grove, CA

Active since April 22, 2008PECOS Enrolled
12100 EUCLID ST, GARDEN GROVE, CA 92840(714) 887-9933 Get Directions Write a Review

NPPES record last updated: December 14, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 14, 2021, Jul 1, 2020, Jun 17, 2020 (3 updates tracked since 2020).

About Mary Catherine Washburn M.d. NPPES

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

MARY CATHERINE WASHBURN M.D. (NPI 1225203169) is an individual obstetrics & gynecology provider in Garden Grove, California, licensed in California (A113839) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1225203169
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMARY CATHERINE WASHBURNCredential: M.D.
Location Address12100 EUCLID STGarden Grove, CA 92840-3304
Mailing Address3440 E La Palma AveAnaheim, CA 92806-2020 · (714) 887-9933
Phone(714) 887-9933
Sole ProprietorNo
Enumeration DateApril 22, 2008
Last NPPES UpdateDecember 14, 20213 updates tracked since enumeration
NPPES CertifiedDecember 14, 2021
✔ NPI 1225203169 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in CA · A113839✔ Licensed in NC · 155911✔ Licensed in AZ · 37528
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
12100 EUCLID ST, Garden Grove, CA 92840
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Other Names 1

Other Name (5)Mary Washburn Bull M.d.

Other Identifiers 2

OtherA113839CA · California License
Other81763Training Permit

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Catherine Washburn M.d. 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 Washburn reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Southern California Permanente Medical Group
6.3 mi
Health Maintenance Organization
1893 W MALVERN AVE
Fullerton, CA 92833
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1336556059 (877) 608-0044

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 92840 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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.

MRS. ADRIANA CERVANTES LONGO M.D.
Internal Medicine
12100 EUCLID ST, 3RD FLOOR
GARDEN GROVE, CA 92840
Orange County (714) 741-3685
MICHELLE SUH
Pharmacist
12100 EUCLID ST
GARDEN GROVE, CA 92840
Orange County (714) 741-3430
CHRISTINE ATALLA
Pharmacist
12100 EUCLID ST
GARDEN GROVE, CA 92840
Orange County (714) 741-3430
GRESHAWNDA CRAYTON RN, FNP-BC, PHN
Registered Nurse
12100 EUCLID ST
GARDEN GROVE, CA 92840
Orange County (714) 741-3516
DR. LAUREN RUBAL M.D.
Obstetrics & Gynecology (Reproductive Endocrinology)
12100 EUCLID ST
GARDEN GROVE, CA 92840
Orange County (888) 988-2800
KELLY YING LIN M.D.
Specialist
12100 EUCLID ST
GARDEN GROVE, CA 92840
Orange County (888) 988-2800
DR. NANCY LEE-HATA MD
Family Medicine
12100 EUCLID ST
GARDEN GROVE, CA 92840
Orange County (714) 741-3665
ASHLEY LANDON BROWN M.D.
Dermatology
12100 EUCLID ST
GARDEN GROVE, CA 92840
Orange County (888) 988-2800

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 Washburn's NPI number?

The NPI number for Mary Washburn is 1225203169. It was assigned to this individual provider in the NPPES registry on April 22, 2008. The provider is also known as Mary Washburn Bull M.D..

Where is Mary Washburn located?

Mary Washburn practices at 12100 Euclid St, Garden Grove, CA 92840. The listed phone number is (714) 887-9933.

What is Mary Washburn's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Mary Washburn enrolled in Medicare?

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

Which organization bills Medicare for Mary Washburn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Washburn reassigns Medicare benefits to Southern California Permanente Medical Group (Fullerton, 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 Washburn'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 Washburn was last updated on December 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.