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DR. ANDREA MENDELSSOHN MD, FACOG, FABIHM
NPI 1144275264
Obstetrics & Gynecology in Lafayette, CA

Active since May 24, 2006PECOS EnrolledAccepts Medicare Assignment
970 DEWING AVE STE 203, LAFAYETTE, CA 94549(925) 299-9001(925) 299-9018 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Mar 17, 2018, Jul 31, 2017 (3 updates tracked since 2017).

About Dr. Andrea Mendelssohn Md, Facog, Fabihm NPPES

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

DR. ANDREA MENDELSSOHN MD, FACOG, FABIHM (NPI 1144275264) is an individual obstetrics & gynecology provider in Lafayette, California, licensed in California (A75537) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Gifford Medical Center, and maintains a secondary practice location in Castro Valley.

NPPES Registry Identity

NPI1144275264
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. ANDREA MENDELSSOHNCredential: MD, FACOG, FABIHM
Location Address970 DEWING AVE STE 203Lafayette, CA 94549-4260
Mailing AddressPo Box 6606Albany, CA 94706-0606 · (510) 529-6659
Phone(925) 299-9001
Fax(925) 299-9018
Sole ProprietorNo
Medical School CMSOtherGraduated 1997
Enumeration DateMay 24, 2006
Last NPPES UpdateJuly 21, 20223 updates tracked since enumeration
✔ NPI 1144275264 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A75537
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.
Also ListedObstetrics & Gynecology · GynecologyTaxonomy 207VG0400X · License A75537 (CA)
970 DEWING AVE STE 203, Lafayette, CA 94549
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Secondary Practice Location 1

Location 119845 Lake Chabot Rd, Suite 200Castro Valley, CA 94546-4055 · Phone (510) 581-0800 · Fax (510) 581-0808

Other Identifiers 1

Medicaid00A755370CA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Andrea Mendelssohn Md, Facog, Fabihm is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID648231860
PECOS Enrollment IDI20250310000809
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 Reassignments

2

Medicare enrollment records show Andrea Mendelssohn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Obhg California, P.C.
2,210 mi
Obstetrics & Gynecology
777 LOWNDES HILL RD BLDG 1
Greenville, SC 29607
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Obhg California PC
  • 711 clinicians in this Medicare group
NPI 1215258892 (800) 967-2289
Gifford Medical Center Inc.
2,583 mi
General Acute Care Hospital
44 S MAIN ST
Randolph, VT 05060
  • Reassigned Medicare billing, Vermont enrollment
  • Also billed through NPI 1730199647 (Vermont)
  • 167 clinicians in this Medicare group
NPI 1942329446 (802) 728-7000

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Gifford Medical Center

Critical Access Hospitals · Randolph, VT
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number471301
Location44 South Main StreetRandolph, VT 05060 · Orange County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94549 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

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

DR. ANAHAT KAUR SANDHU M.D.
Obstetrics & Gynecology
970 DEWING AVE STE 203
LAFAYETTE, CA 94549
Contra Costa County (925) 299-9001

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 Andrea Mendelssohn's NPI number?

The NPI number for Andrea Mendelssohn is 1144275264. It was assigned to this individual provider in the NPPES registry on May 24, 2006.

Where is Andrea Mendelssohn located?

Andrea Mendelssohn practices at 970 Dewing Ave Ste 203, Lafayette, CA 94549. The listed phone number is (925) 299-9001.

What is Andrea Mendelssohn's specialty?

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

Is Andrea Mendelssohn enrolled in Medicare?

Yes. Andrea Mendelssohn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Andrea Mendelssohn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrea Mendelssohn reassigns Medicare benefits to 2 organizations: Obhg California, P.C. (Greenville, SC) and Gifford Medical Center Inc. (Randolph, VT). Each 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 Andrea Mendelssohn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Andrea Mendelssohn accept?

Health plans from Anthem Blue Cross and Blue Shield list Andrea Mendelssohn as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Andrea Mendelssohn affiliated with any hospitals?

According to CMS data, Andrea Mendelssohn is affiliated with Gifford Medical Center.

When was this NPI record last updated?

The NPPES record for Andrea Mendelssohn was last updated on July 21, 2022. 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.