ANN S MERCER MD PA
NPI 1164613261
Internal Medicine in Las Cruces, NM
About Ann S Mercer Md Pa NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANN S MERCER MD PA (NPI 1164613261) is a healthcare organization registered as an internal medicine in Las Cruces, New Mexico and active in the NPI registry since August 2007. The organization holds a CLIA Microscopy certificate valid through September 19, 2028 and lists Ann Shukri Mercer, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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)
Ann S Mercer Md Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Ann S Mercer MD PA, 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.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate for Provider-Performed Microscopy Procedures (PPMP) 32D0536982
Ann S Mercer MD PA · Las Cruces, NMFrequently 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 Ann S Mercer MD PA's NPI number?
The NPI number for Ann S Mercer MD PA is 1164613261. It was assigned to this organization in the NPPES registry on August 5, 2007.
Where is Ann S Mercer MD PA located?
Ann S Mercer MD PA is located at 2801 Missouri Ave Ste 12, Las Cruces, NM 88011. The listed phone number is (505) 522-6900.
What is Ann S Mercer MD PA's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ann S Mercer MD PA enrolled in Medicare?
Yes. Ann S Mercer MD PA is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Ann S Mercer MD PA?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Ann S Mercer MD PA. 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.
Does Ann S Mercer MD PA hold a CLIA laboratory certificate?
Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 32D0536982) is associated with this NPI, valid through September 19, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Ann S Mercer MD PA was last updated on December 6, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Ann S Mercer Md Pa · NPI 1164613261
Internal Medicine organization in Las Cruces, New Mexico. Organization record, active in the CMS NPPES registry since August 5, 2007.
## Identity
- **NPI:** 1164613261 (Entity type: Organization)
- **Enumerated:** August 5, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Ann Mercer, PRESIDENT
## Practice location
- **Address:** 2801 MISSOURI AVE STE 12, Las Cruces, NM 88011-5061
- **Phone:** (505) 522-6900 · **Fax:** (505) 522-8891
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 6, 2007
- **Other identifiers:** Medicare UPIN D08431 (NM); Medicaid 33407 (NM); Medicare PIN M00521010 (NM)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1164613261) · Data from the CMS NPPES public registry.