Gwynn R. Patterson, MD
Obstetrics & Gynecology Physician · Sierra Vista, AZ
Gwynn R. Patterson, MD is an obstetrics & gynecology physician with a practice address in Sierra Vista, Arizona, and NPI 1134111941, issued on Aug 17, 2005. Check the license (Arizona 14904, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gwynn R. Patterson
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 14904 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 4990 E Mediterranean Dr, Sierra Vista, AZ 85635
- Phone
- (520) 417-2229
- Enumerated
- Aug 17, 2005
- Record last updated
- Jan 29, 2026
- Fax
- (520) 417-2266
- Medicaid IDs
- 270348002 AZ
2700348002 AZ - Medicare enrollment
- Enrolled (PECOS I20040219000933); accepts Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 803 in Arizona → Look up another NPI →
Also registered at 4990 E Mediterranean Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samuel Sigoloff, D.O.Family Medicine Physician1629486154
Verify Gwynn R. Patterson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 14904Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
271 Medicare Part D claims for 81 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Estradiol58 claims
- Imvexxy29 claims
- Estradiol (Twice Weekly)27 claims
- Progesterone22 claims
- Ondansetron Hcl13 claims
- Imipramine Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Gwynn R. Patterson among 803 obstetrics & gynecology physician records in Arizona
Gwynn R. Patterson, MD is one of 803 obstetrics & gynecology physician records with a practice address in Arizona. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1980 · median 2005 among the 477 with a school on file
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Arizona
There are 803 obstetrics & gynecology physician records in Arizona.
All 803 in Arizona → Every provider in Sierra Vista → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Nathaniel Evans, D.OSierra Vista, AZ 856351104054378
- Cynthia Funckes, M.D.Sierra Vista, AZ 856351033140512
- Robert Holder, MDSierra Vista, AZ 856351861426439
- Kenneth Kacenga, DOSierra Vista, AZ 856351245279827
- Bruce Silva, M.D.Sierra Vista, AZ 856351801836119
- Martha Prendergast, D.O.Willcox, AZ 856431023527363
- Frank Sturdevant, M.D.Green Valley, AZ 856221811142888
- Taylor Jenkins, MDNogales, AZ 856211639602626
Common questions
What is Gwynn R. Patterson, MD's NPI number?
Gwynn R. Patterson, MD's National Provider Identifier (NPI) is 1134111941, issued on Aug 17, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gwynn R. Patterson, MD located?
The NPPES record lists a practice address at 4990 E Mediterranean Dr, Sierra Vista, AZ, 85635. Phone: (520) 417-2229. Providers update this record themselves, so call before visiting.
How can I verify Gwynn R. Patterson, MD's license?
NPPES lists Arizona license number 14904, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gwynn R. Patterson, MD prescribe under Medicare Part D?
In 2024, Gwynn R. Patterson, MD had 271 Medicare Part D claims for 81 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.