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MARK W. GREENWELL M.D.
NPI 1184681371
Internal Medicine - Nephrology in Paris, TX

Active since May 01, 2006PECOS EnrolledAccepts Medicare Assignment
635 STONE AVE, PARIS, TX 75460(903) 785-3300(903) 785-3310 Get Directions Write a Review

NPPES record last updated: April 20, 2023. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mark W. Greenwell M.d. NPPES

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

MARK W. GREENWELL M.D. (NPI 1184681371) is an individual nephrology provider in Paris, Texas, licensed in Texas (P3725) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Mccurtain Memorial Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1184681371
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameMARK W. GREENWELLCredential: M.D.
Location Address635 STONE AVEParis, TX 75460-9342
Mailing Address1133 Medical DrTyler, TX 75701-2130 · (903) 595-5486 · Fax (903) 595-5128
Phone(903) 785-3300
Fax(903) 785-3310
Sole ProprietorNo
Medical School CMSUniversity Of Texas Medical School At HoustonGraduated 1999
Enumeration DateMay 1, 2006
Last NPPES UpdateApril 20, 2023
NPPES CertifiedApril 20, 2023
✔ NPI 1184681371 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
Licenses✔ Licensed in TX · P3725✔ Licensed in OK · 29498
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
635 STONE AVE, Paris, TX 75460
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11104 E Lincoln RdIdabel, OK 74745-7364 · Phone (903) 785-3300 · Fax (903) 785-3310
Location 2105 Medical Cir Bldg 3Sulphur Springs, TX 75482-2138 · Phone (903) 785-3300 · Fax (903) 785-3310

Other Identifiers 2

Medicaid200452580 AOK
Medicaid3058059-01TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mark W. Greenwell M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6800808387
PECOS Enrollment IDI20120906000268, I20130117000319
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
580 services393 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
351 services102 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
251 services66 patients
Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
93 services51 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
90 services44 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
85 services65 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mccurtain Memorial Hospital

Critical Access Hospitals · Idabel, OK
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number371342
Location1301 Lincoln RoadIdabel, OK 74745 · Mccurtain County
Emergency services

Titus Regional Medical Center

Acute Care Hospitals · Mount Pleasant, TX
2/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number450080
Location2001 N JeffersonMount Pleasant, TX 75455 · Titus County
Emergency services Birthing friendly

Christus Mother Frances Hospital

Acute Care Hospitals · Tyler, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450102
Location800 East DawsonTyler, TX 75701 · Smith County
Emergency services Birthing friendly

Paris Regional Medical Center

Acute Care Hospitals · Paris, TX
2/5 CMS rating
OwnershipProprietary
CMS Certification Number450196
Location865 Deshong DrParis, TX 75460 · Lamar County
Emergency services Birthing friendly

Christus Mother Frances Hospital Sulphur Springs

Acute Care Hospitals · Sulphur Springs, TX
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450236
Location115 Airport RdSulphur Springs, TX 75482 · Hopkins County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 75460 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers53 claims6,270 services$0.29 avg. paid by Medicare
Prednisone, immediate release or delayed release, oral, 1 mg J7512
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers20 claims2,925 services$0.01 avg. paid by Medicare
Mycophenolic acid, oral, 180 mg J7518
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers45 claims9,480 services$0.94 avg. paid by Medicare
Everolimus, oral, 0.25 mg J7527
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier11 claims3,960 services$3.94 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
5 suppliers62 claims62 services$17.70 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
5 suppliers63 claims72 services$12.44 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AMY JOLLEY ANP
Nurse Practitioner (Adult Health)
635 STONE AVE
PARIS, TX 75460
Lamar County (903) 785-9900
NORTHEAST TEXAS PRIMARY CARE, PA
Internal Medicine
635 STONE AVE
PARIS, TX 75460
Lamar County (903) 785-9900
DEBORAH JO ELMORE RN, MSN, FNP-BC
Nurse Practitioner (Family)
635 STONE AVE
PARIS, TX 75460
Lamar County (903) 785-3300
NIKKI SHANNON JOHNSTON APRN, FNP-BC
Nurse Practitioner
635 STONE AVE
PARIS, TX 75460
Lamar County (903) 785-3300
PAULA LEANN GASTON NP-C
Nurse Practitioner (Family)
635 STONE AVE
PARIS, TX 75460
Lamar County (903) 706-5071
DANISE A PETTICREW RN, FNP-C
Nurse Practitioner (Family)
635 STONE AVE
PARIS, TX 75460
Lamar County (903) 785-3300

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 Mark Greenwell's NPI number?

The NPI number for Mark Greenwell is 1184681371. It was assigned to this individual provider in the NPPES registry on May 1, 2006.

Where is Mark Greenwell located?

Mark Greenwell practices at 635 Stone Ave, Paris, TX 75460. The listed phone number is (903) 785-3300.

What is Mark Greenwell's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Mark Greenwell enrolled in Medicare?

Yes. Mark Greenwell is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Mark Greenwell accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 4 other insurers list Mark Greenwell as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mark Greenwell affiliated with any hospitals?

According to CMS data, Mark Greenwell is affiliated with Mccurtain Memorial Hospital, Titus Regional Medical Center, Christus Mother Frances Hospital, Paris Regional Medical Center and Christus Mother Frances Hospital Sulphur Springs.

When was this NPI record last updated?

The NPPES record for Mark Greenwell was last updated on April 20, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.