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GREGORY NEILL SACHER MD
NPI 1972682011
Obstetrics & Gynecology in Santa Rosa, CA

Active since November 02, 2006PECOS EnrolledAccepts Medicare Assignment
500 DOYLE PARK DR, SUITE 200, SANTA ROSA, CA 95405(707) 303-1719(707) 387-3696 Get Directions Write a Review

NPPES record last updated: March 19, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 19, 2025, Nov 10, 2021, Feb 4, 2021 and 1 more (4 updates tracked since 2016).

About Gregory Neill Sacher Md NPPES

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

GREGORY NEILL SACHER MD (NPI 1972682011) is an individual obstetrics & gynecology provider in Santa Rosa, California, licensed in California (A68058) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Rapid City, and is a graduate of Georgetown University School Of Medicine (1997).

NPPES Registry Identity

NPI1972682011
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameGREGORY NEILL SACHERCredential: MD
Location Address500 DOYLE PARK DR, SUITE 200Santa Rosa, CA 95405-4558
Mailing Address500 Doyle Park Dr, Suite 200Santa Rosa, CA 95405-4558 · (707) 303-1719 · Fax (707) 387-3696
Phone(707) 303-1719
Fax(707) 387-3696
Sole ProprietorNo
Medical School CMSGeorgetown University School Of MedicineGraduated 1997
Enumeration DateNovember 2, 2006
Last NPPES UpdateMarch 19, 20254 updates tracked since enumeration
NPPES CertifiedMarch 19, 2025
✔ NPI 1972682011 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 · A68058✔ Licensed in SD · 16766
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.
500 DOYLE PARK DR, Santa Rosa, CA 95405
Open in Google Maps ↗

Secondary Practice Location 1

Location 1353 Fairmont BlvdRapid City, SD 57701-7375 · Phone (864) 908-3530

Other Identifiers 2

Medicaid1972682011SD
Medicaid00A680580CA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Wellmark of South Dakota, Inc..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

Gregory Neill Sacher Md 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 ID1052507969
PECOS Enrollment IDI20101117001588
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

5

Medicare enrollment records show Gregory Sacher reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Medical Foundation
Same address
Internal Medicine
500 DOYLE PARK DR, SUITE 303
Santa Rosa, CA 95405
  • Reassigned Medicare billing, California enrollment
  • 1,699 clinicians in this Medicare group
NPI 1740584473 (707) 303-8300
Confermed Of California PC
428 mi
Internal Medicine
101 ACADEMY STE 100
Irvine, CA 92617
  • Reassigned Medicare billing, California enrollment
  • 118 clinicians in this Medicare group
NPI 1316584709 (860) 323-0172
Obhg South Dakota PC
1,082 mi
Obstetrics & Gynecology
353 FAIRMONT BLVD
Rapid City, SD 57701
  • Reassigned Medicare billing, South Dakota enrollment
  • 31 clinicians in this Medicare group
NPI 1164110243 (864) 908-3530
Obhg Oregon PC
2,237 mi
Obstetrics & Gynecology
777 LOWNDES HILL RD BLDG 1
Greenville, SC 29607
  • Reassigned Medicare billing, Oregon enrollment
  • 51 clinicians in this Medicare group
NPI 1528585148 (800) 967-2289
Obhg California, P.C.
2,237 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

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 95405 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
$142.00 typical visit price
range $63.04 – $187.01
Typical copayment $35.50 (range $15.76 – $46.75)
Most-billed visit code 99204
Established Patient
$77.94 typical visit price
range $21.02 – $153.40
Typical copayment $19.48 (range $5.25 – $38.35)
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.

LEO ARTHUR SMITH MD
Family Medicine
500 DOYLE PARK DR, SUITE G-04
SANTA ROSA, CA 95405
Sonoma County (707) 303-8360
CYNTHIA R. INGELS MSN,N.P.
Nurse Practitioner (Family)
500 DOYLE PARK DR, SUITE 103
SANTA ROSA, CA 95405
Sonoma County (707) 579-1102
DR. JAMES CHARLES DEVORE MD
Family Medicine
500 DOYLE PARK DR, SUITE G04
SANTA ROSA, CA 95405
Sonoma County (707) 303-8360
DR. TOMAS VASILIAUSKAS M.D.
Internal Medicine (Cardiovascular Disease)
500 DOYLE PARK DR, SUITE G05
SANTA ROSA, CA 95405
Sonoma County (707) 576-7100
ERAN MATALON M.D.
Internal Medicine
500 DOYLE PARK DR, SUITE 304
SANTA ROSA, CA 95405
Sonoma County (707) 545-1700
RAMZI KHALIL DEEIK M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
500 DOYLE PARK DR, SUITE G-05
SANTA ROSA, CA 95405
Sonoma County (707) 255-8825
DR. JOEL E PAINE MD
Internal Medicine
500 DOYLE PARK DR, SUITE 300
SANTA ROSA, CA 95405
Sonoma County (707) 303-8344
ANNADEL MEDICAL GROUP, INC
Pediatrics
500 DOYLE PARK DR, SUITE 100
SANTA ROSA, CA 95405
Sonoma County (707) 544-6090

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 Gregory Sacher's NPI number?

The NPI number for Gregory Sacher is 1972682011. It was assigned to this individual provider in the NPPES registry on November 2, 2006.

Where is Gregory Sacher located?

Gregory Sacher practices at 500 Doyle Park Dr Suite 200, Santa Rosa, CA 95405. The listed phone number is (707) 303-1719.

What is Gregory Sacher's specialty?

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

Is Gregory Sacher enrolled in Medicare?

Yes. Gregory Sacher 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 Gregory Sacher's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Sacher reassigns Medicare benefits to 5 organizations: Providence Medical Foundation (Santa Rosa, CA), Confermed Of California PC (Irvine, CA), Obhg South Dakota PC (Rapid City, SD), Obhg Oregon PC (Greenville, SC) and Obhg California, P.C. (Greenville, SC). 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 Gregory Sacher's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Sacher accept?

Health plans from Wellmark of South Dakota, Inc. list Gregory Sacher 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.

When was this NPI record last updated?

The NPPES record for Gregory Sacher was last updated on March 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.