Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Margarita Rosendo Johnston, MD
Urology Physician in Ennis, TX · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1306897137
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Registry record
Entity type Individual (Type 1)
Name Dr. Margarita Rosendo Johnston
Credential MD
Sex Female
Practice address 206 S Clay St Ste A, Ennis, TX, 75119
Phone (903) 229-4292
Fax (903) 229-4288
Enumeration date May 15, 2006
Last updated in NPPES Apr 6, 2026
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 285796303 | Medicaid | TX | - |
| 285796304 | Medicaid | TX | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Margarita Johnston?
Margarita Johnston is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → John Arkusinski Family Medicine Physician · Ennis, TX NPI 1093714826 Davey Perrin Family Medicine Physician · Ennis, TX NPI 1518057439 Davey M Perrin M.D. Family Medicine Physician · Ennis, TX NPI 1043443054 Edward Jones Family Nurse Practitioner · Ennis, TX NPI 1679073787 Hsgf Medical Family Medicine Physician · Ennis, TX NPI 1568323756
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-06.