Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark W. Greenwell, M.D.
Nephrology Physician in Paris, TX · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1184681371
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Registry record
Entity type Individual (Type 1)
Name Mark W. Greenwell
Credential M.D.
Sex Male
Practice address 635 Stone Ave, Paris, TX, 75460
Phone (903) 785-3300
Fax (903) 785-3310
Enumeration date May 1, 2006
Last updated in NPPES Apr 20, 2023
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 |
|---|---|---|---|
| 200452580 A | Medicaid | OK | - |
| 3058059-01 | 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 Mark Greenwell?
Mark Greenwell is registered in NPPES with the primary taxonomy of Nephrology 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 → Danise Petticrew Family Nurse Practitioner · Paris, TX NPI 1952359200 Northeast Texas Primary Care, PA Internal Medicine Physician · Paris, TX NPI 1326266552 Paula Gaston Family Nurse Practitioner · Paris, TX NPI 1720363344 Amy Jolley Adult Health Nurse Practitioner · Paris, TX NPI 1083983316 Nikki Johnston Nurse Practitioner · Paris, TX NPI 1528593472 Deborah Elmore Family Nurse Practitioner · Paris, TX NPI 1447776539 Fresenius Medical Care Paris Home, LLC End-Stage Renal Disease (ESRD) Treatment Clinic/Center · Paris, TX NPI 1285428185
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-04-20.