DR. MARIO MARQUIST RAY M.D.
NPI 1326128364
Hospitalist in Memphis, TN

Q: What is Mario Ray's NPI number?

The NPI number for Mario Ray is 1326128364. It was assigned to this individual provider in the NPPES registry on October 16, 2006.

Q: What is Mario Ray's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for Mario Ray was last updated on August 14, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.

Active since October 16, 2006PECOS EnrolledAccepts Medicare Assignment

75.06/100

CMS Quality Rating

877 JEFFERSON AVE, RM A589, MEMPHIS, TN 38103(901) 545-8774 Get Directions Write a Review

NPPES record last updated: August 14, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Mario Marquist Ray M.d. NPPES

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

DR. MARIO MARQUIST RAY M.D. (NPI 1326128364) is an individual hospitalist provider in Memphis, Tennessee, licensed in Tennessee (39663) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Regional One Health, and is a graduate of University Of Tennessee, Hsc, College Of Medicine (2003).

NPPES Registry Identity

NPI1326128364

Entity TypeIndividualMale

Primary Taxonomy208M00000X

Provider Legal NameDR. MARIO MARQUIST RAYCredential: M.D.

Location Address877 JEFFERSON AVE, RM A589Memphis, TN 38103-2807

Mailing Address877 Jefferson Ave, Rm A589Memphis, TN 38103-2807 · (901) 545-8774

Phone(901) 545-8774

Sole ProprietorNo

Medical School CMSUniversity Of Tennessee, Hsc, College Of MedicineGraduated 2003

Enumeration DateOctober 16, 2006

Last NPPES UpdateAugust 14, 2017

✔ NPI 1326128364 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in TN · 39663

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License 39663 (TN)

877 JEFFERSON AVE, Memphis, TN 38103

Open in Google Maps ↗

Other Identifiers 1

Medicare UPINVAD 000TN

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mario Marquist Ray 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 ID8123129855

PECOS Enrollment IDI20070725000601

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.

Medicare Billing Reassignment

Medicare enrollment records show Mario Ray reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ut Regional One Physicians Inc

Same address

Surgery

877 JEFFERSON AVE
Memphis, TN 38103

Reassigned Medicare billing, Tennessee enrollment
421 clinicians in this Medicare group

NPI 1093130585 (901) 545-8336

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

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.

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.

434 services101 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

54 services53 patients

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

38 services17 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.

35 services30 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

33 services33 patients

Hospital discharge day management, 30 minutes or less 99238

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

12 services11 patients

Hospital Affiliations CMS Care Compare

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

Regional One Health

Acute Care Hospitals · Memphis, TN

1/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number440152

Location877 Jefferson AvenueMemphis, TN 38103 · Shelby County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 38103 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

$121.80 typical visit price

range $52.64 – $160.89

Typical copayment $30.45 (range $13.16 – $40.22)

Most-billed visit code 99204

Established Patient

$93.60 typical visit price

range $16.72 – $131.41

Typical copayment $23.40 (range $4.18 – $32.85)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75.06/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

56.46

Improvement Activities

Cost

71.87

Referred Medical Equipment & Supplies CMS DME claims 17

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

Walker, folding, wheeled, adjustable or fixed height E0143

DME-Other DME · category DE000N

5 suppliers13 claims13 services$61.98 avg. paid by Medicare

Walker, heavy duty, wheeled, rigid or folding, any type E0149

DME-Other DME · category DE000N

2 suppliers16 claims16 services$6.91 avg. paid by Medicare

Commode chair, mobile or stationary, with fixed arms E0163

DME-Other DME · category DE000N

7 suppliers12 claims12 services$65.10 avg. paid by Medicare

Commode chair, mobile or stationary, with detachable arms E0165

DME-Other DME · category DE000N

5 suppliers72 claims72 services$9.06 avg. paid by Medicare

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260

DME-Hospital Beds · category DB000N

2 suppliers13 claims13 services$69.82 avg. paid by Medicare

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, without mattress E0261

DME-Hospital Beds · category DB000N

1 supplier17 claims17 services$39.42 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 20

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

MIMILY HARSONO MD

Pediatrics (Neonatal-Perinatal Medicine)

877 JEFFERSON AVE
MEMPHIS, TN 38103

Shelby County (901) 545-7100

JESSICA DORAN DNP, CRNA

Nurse Anesthetist, Certified Registered

877 JEFFERSON AVE
MEMPHIS, TN 38103

Shelby County (901) 448-5893

SHELBY COUNTY HEALTH CARE CORPORATION

Skilled Nursing Facility

877 JEFFERSON AVE, 3RD FLOOR, ADAMS PAVILION
MEMPHIS, TN 38103

Shelby County (901) 515-4300

EDSON RUIZ MD

Pediatrics (Neonatal-Perinatal Medicine)

877 JEFFERSON AVE
MEMPHIS, TN 38103

Shelby County (901) 448-5950

MS. MARLA GIDDENS CRNA

Nurse Anesthetist, Certified Registered

877 JEFFERSON AVE
MEMPHIS, TN 38103

Shelby County (901) 545-7100

MARY BETH HALL-KRASNOVE FNP

Nurse Practitioner (Family)

877 JEFFERSON AVE
MEMPHIS, TN 38103

Shelby County (901) 545-8090

MEGAN TALLEY

Dietitian, Registered

877 JEFFERSON AVE
MEMPHIS, TN 38103

Shelby County (901) 545-7753

COURTNEY H PARKER CRNA

Nurse Anesthetist, Certified Registered

877 JEFFERSON AVE
MEMPHIS, TN 38103

Shelby County (901) 545-7100

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 Mario Ray's NPI number?

The NPI number for Mario Ray is 1326128364. It was assigned to this individual provider in the NPPES registry on October 16, 2006.

Where is Mario Ray located?

Mario Ray practices at 877 Jefferson Ave Rm A589, Memphis, TN 38103. The listed phone number is (901) 545-8774.

What is Mario Ray's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Mario Ray enrolled in Medicare?

Yes. Mario Ray 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.

Which organization bills Medicare for Mario Ray's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mario Ray reassigns Medicare benefits to Ut Regional One Physicians Inc (Memphis, TN). The 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 Mario Ray's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mario Ray accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 2 other insurers list Mario Ray 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 Mario Ray affiliated with any hospitals?

According to CMS data, Mario Ray is affiliated with Regional One Health.

When was this NPI record last updated?

The NPPES record for Mario Ray was last updated on August 14, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.