MS. TWYILA D. LAY N.P., M.S.N., R.N.
NPI 1770503757
Nurse Practitioner - Acute Care in San Francisco, CA
About Ms. Twyila D. Lay N.p., M.s.n., R.n. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. TWYILA D. LAY N.P., M.S.N., R.N. (NPI 1770503757) is an individual acute care provider in San Francisco, California, licensed in California (NPF7643) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ms. Twyila D. Lay N.p., M.s.n., R.n. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Twyila Lay reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 1,573 clinicians in this Medicare group
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 94110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
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 Twyila Lay's NPI number?
The NPI number for Twyila Lay is 1770503757. It was assigned to this individual provider in the NPPES registry on July 20, 2006.
Where is Twyila Lay located?
Twyila Lay practices at 1001 Potrero Ave, San Francisco, CA 94110. The listed phone number is (415) 206-3219.
What is Twyila Lay's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Twyila Lay enrolled in Medicare?
Yes. Twyila Lay is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Twyila Lay's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Twyila Lay reassigns Medicare benefits to City & County Of San Francisco (San Francisco, CA). The 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 Twyila Lay's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Twyila Lay was last updated on January 12, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Ms. Twyila D. Lay, N.P., M.S.N., R.N. · NPI 1770503757
Acute Care physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since July 20, 2006.
## Identity
- **NPI:** 1770503757 (Entity type: Individual)
- **Enumerated:** July 20, 2006
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** NPF7643 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1001 POTRERO AVE, San Francisco, CA 94110-3518
- **Phone:** (415) 206-3219 · **Fax:** (415) 502-4985
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** City & County Of San Francisco (NPI 1083648810, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 12, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1770503757) · Data from the CMS NPPES public registry.