What is Margaret Meyer's NPI number?

Margaret Meyer's National Provider Identifier (NPI) is 1639289358, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Margaret Meyer's specialty?

Margaret Meyer is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).

Where is Margaret Meyer located?

Margaret Meyer's practice location on file with NPPES is 181 Andrieux St, Sonoma, CA 95476-6920.

What is Margaret Meyer's phone number?

The practice phone number listed in the NPPES registry for Margaret Meyer is (707) 996-8017.

Does Margaret Meyer accept Medicare?

Margaret Meyer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Margaret Meyer's NPI active?

Yes — Margaret Meyer's NPI (1639289358) is active in the NPPES registry as of the last update on 2026-02-18.

IndividualActiveAccepts Medicare

Margaret Meyer, MD

NPI 1639289358 · Orthopaedic Surgery Physician · Sonoma, CA

Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Margaret Meyer, MD is a Orthopaedic Surgery Physician provider in Sonoma, CA (NPI 1639289358).

Provider details

NPI number: 1639289358
Entity type: Individual
Primary specialty: Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Female
Sole proprietor: No
License: A88282 (CA)

Specialties & taxonomies

Orthopaedic Surgery PhysicianPrimary207X00000XLicense A88282 (CA)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(74/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
19 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
2 documented practice locations
Medicare service volume (vs. specialty peers)25% of score
168 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	55	$92
Aspiration And/Or Injection of Fluid From Large Joint20610	27	$71
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	27	$121
New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203	25	$114
Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212	21	$59
X-Ray of Shoulder, Minimum of 2 Views

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$20 across 1 record (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Practice location

181 Andrieux St

Ste #111

Sonoma, CA 95476-6920

Phone: (707) 996-8017

Fax: (707) 996-8061

Street-level locationGet directions

More CA providers

Mailing address

Po Box 1722