ROBERT HARF ORTHOPAEDICS A PROFESSIONAL CORPORATION
NPI 1639474356
Orthopaedic Surgery - Orthopaedic Surgery of the Spine in Sonoma, CA
About Robert Harf Orthopaedics A Professional Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT HARF ORTHOPAEDICS A PROFESSIONAL CORPORATION (NPI 1639474356) is a healthcare organization registered as an orthopaedic surgery of the spine in Sonoma, California and active in the NPI registry since January 2011. The organization lists Robert Alan Harf, Owner & Managing Physician, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Robert Harf Orthopaedics A Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by January 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Robert Harf Orthopaedics A Professional Corporation, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Robert Harf Orthopaedics A Professional Corporation's NPI number?
The NPI number for Robert Harf Orthopaedics A Professional Corporation is 1639474356. It was assigned to this organization in the NPPES registry on January 12, 2011.
Where is Robert Harf Orthopaedics A Professional Corporation located?
Robert Harf Orthopaedics A Professional Corporation is located at 181 Andrieux St Suite 111, Sonoma, CA 95476. The listed phone number is (707) 996-8017.
What is Robert Harf Orthopaedics A Professional Corporation's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.
Is Robert Harf Orthopaedics A Professional Corporation enrolled in Medicare?
Yes. Robert Harf Orthopaedics A Professional Corporation is registered in the Medicare PECOS enrollment system.
When is Robert Harf Orthopaedics A Professional Corporation's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Robert Harf Orthopaedics A Professional Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Orthopedic Surgery) reassigns their Medicare billing to Robert Harf Orthopaedics A Professional Corporation. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Robert Harf Orthopaedics A Professional Corporation was last updated on January 12, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Robert Harf Orthopaedics A Professional Corporation · NPI 1639474356
Orthopaedic Surgery of the Spine organization in Sonoma, California. Organization record, active in the CMS NPPES registry since January 12, 2011.
## Identity
- **NPI:** 1639474356 (Entity type: Organization)
- **Enumerated:** January 12, 2011
- **Primary specialty:** Orthopaedic Surgery - Orthopaedic Surgery of the Spine · taxonomy 207XS0117X
- **Organization subpart:** No
- **Authorized official:** Robert Harf, OWNER & MANAGING PHYSICIAN
## Practice location
- **Address:** 181 ANDRIEUX ST, SUITE 111, Sonoma, CA 95476-6932
- **Phone:** (707) 996-8017 · **Fax:** (707) 996-8061
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** January 31, 2027 (Non-DME Part B, California, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Orthopedic Surgery) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 12, 2011
- **Other identifiers:** Medicare PIN 00A406260 (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1639474356) · Data from the CMS NPPES public registry.