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GWYNN R PATTERSON MD PLLC
NPI 1013129923
Obstetrics & Gynecology in Sierra Vista, AZ

Active since May 04, 2007
4990 E MEDITERRANEAN DR STE C, SIERRA VISTA, AZ 85635(520) 417-2229(520) 417-2226 Get Directions Write a Review

NPPES record last updated: February 19, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 21, 2022, Aug 22, 2020 (2 updates tracked since 2020).

About Gwynn R Patterson Md Pllc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GWYNN R PATTERSON MD PLLC (NPI 1013129923) is a healthcare organization registered as an obstetrics & gynecology in Sierra Vista, Arizona and active in the NPI registry since May 2007. The organization lists Gwynn R Patterson, Physician, as its authorized official.

NPPES Registry Identity

NPI1013129923
Entity TypeOrganization
Primary Taxonomy207V00000X
Legal Business NameGWYNN R PATTERSON MD PLLC
Location Address4990 E MEDITERRANEAN DR STE CSierra Vista, AZ 85635-2495
Mailing Address4990 E Mediterranean Dr Ste CSierra Vista, AZ 85635-2495 · (520) 417-2229 · Fax (520) 417-2226
Phone(520) 417-2229
Fax(520) 417-2226
Organization SubpartNo
Authorized OfficialGwynn R PattersonPhysician · (520) 417-2229
Enumeration DateMay 4, 2007
Last NPPES UpdateFebruary 19, 20262 updates tracked since enumeration
NPPES CertifiedFebruary 19, 2026
✔ NPI 1013129923 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
4990 E MEDITERRANEAN DR STE C, Sierra Vista, AZ 85635
Open in Google Maps ↗

Other Identifiers 1

Medicaid270348002AZ

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gwynn R Patterson Md Pllc 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 Gwynn R Patterson MD PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Gwynn Patterson, MD PLLC
Obstetrics/Gynecology
NPI 1134111941
155 EL CAMINO REAL STE A
Sierra Vista, AZ 85635
(520) 417-2229
✔ PECOS✔ Accepts Medicare1.6 mi

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 Gwynn R Patterson MD PLLC's NPI number?

The NPI number for Gwynn R Patterson MD PLLC is 1013129923. It was assigned to this organization in the NPPES registry on May 4, 2007.

Where is Gwynn R Patterson MD PLLC located?

Gwynn R Patterson MD PLLC is located at 4990 E Mediterranean Dr Ste C, Sierra Vista, AZ 85635. The listed phone number is (520) 417-2229.

What is Gwynn R Patterson MD PLLC's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Gwynn R Patterson MD PLLC enrolled in Medicare?

Yes. Gwynn R Patterson MD PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gwynn R Patterson MD PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Obstetrics/Gynecology) reassigns their Medicare billing to Gwynn R Patterson MD PLLC. 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 Gwynn R Patterson MD PLLC was last updated on February 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.