OGNOMY SLEEP ASSOCIATES CA
NPI 1881390318
Internal Medicine - Sleep Medicine in San Francisco, CA
About Ognomy Sleep Associates Ca NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
OGNOMY SLEEP ASSOCIATES CA (NPI 1881390318) is a healthcare organization registered as a sleep medicine in San Francisco, California and active in the NPI registry since February 2023. The organization lists Ken Rosenfeld, Coo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ognomy Sleep Associates Ca is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
9Medicare enrollment records show 9 clinicians reassign Medicare billing to Ognomy Sleep Associates Ca, which bills Medicare for the services they deliver. They are listed nearest first.
Clinicians, nearest first (9)
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 Ognomy Sleep Associates Ca's NPI number?
The NPI number for Ognomy Sleep Associates Ca is 1881390318. It was assigned to this organization in the NPPES registry on February 6, 2023.
Where is Ognomy Sleep Associates Ca located?
Ognomy Sleep Associates Ca is located at 201 Spear St Ste 1100, San Francisco, CA 94105. The listed phone number is (877) 664-6669.
What is Ognomy Sleep Associates Ca's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.
Is Ognomy Sleep Associates Ca enrolled in Medicare?
Yes. Ognomy Sleep Associates Ca is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Ognomy Sleep Associates Ca?
According to the CMS Revalidation Reassignment List (October 2026 release), 9 clinicians in 3 Medicare specialties reassign their Medicare billing to Ognomy Sleep Associates Ca. 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. The largest specialties are Nurse Practitioner (7), Internal Medicine (1) and Neurology (1). Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Ognomy Sleep Associates Ca was last updated on July 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Ognomy Sleep Associates Ca · NPI 1881390318
Sleep Medicine organization in San Francisco, California. Organization record, active in the CMS NPPES registry since February 6, 2023.
## Identity
- **NPI:** 1881390318 (Entity type: Organization)
- **Enumerated:** February 6, 2023
- **Primary specialty:** Internal Medicine - Sleep Medicine · taxonomy 207RS0012X
- **Organization subpart:** No
- **Authorized official:** Ken Rosenfeld, COO
## Practice location
- **Address:** 201 SPEAR ST STE 1100, San Francisco, CA 94105-6164
- **Phone:** (877) 664-6669
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 9 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (7), Internal Medicine (1), Neurology (1) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 8, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1881390318) · Data from the CMS NPPES public registry.