MARIAH ELIZABETH SMALL-O'SULLIVAN M.D.
NPI 1477085249
Otolaryngology in Hot Springs, AR

Q: What is Mariah Small-o'sullivan's NPI number?

The NPI number for Mariah Small-o'sullivan is 1477085249. It was assigned to this individual provider in the NPPES registry on March 31, 2017.

Q: What is Mariah Small-o'sullivan's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

Active since March 31, 2017PECOS EnrolledAccepts Medicare Assignment

1 MERCY LN STE 106, HOT SPRINGS, AR 71913(501) 609-2368 Get Directions Write a Review

NPPES record last updated: May 20, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 20, 2022, Mar 31, 2017 (2 updates tracked since 2017).

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About Mariah Elizabeth Small-o'sullivan M.d. NPPES

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

MARIAH ELIZABETH SMALL-O'SULLIVAN M.D. (NPI 1477085249) is an individual otolaryngology provider in Hot Springs, Arkansas, licensed in Arkansas (E-15155) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS and is a graduate of University Of Arkansas College Of Medicine (2017).

NPPES Registry Identity

NPI1477085249

Entity TypeIndividualFemale

Primary Taxonomy207Y00000X

Provider Legal NameMARIAH ELIZABETH SMALL-O'SULLIVANCredential: M.D.

Location Address1 MERCY LN STE 106Hot Springs, AR 71913-6408

Mailing AddressPo Box 21850Hot Springs, AR 71903-1850 · (501) 609-2368

Phone(501) 609-2368

Sole ProprietorNo

Medical School CMSUniversity Of Arkansas College Of MedicineGraduated 2017

Enumeration DateMarch 31, 2017

Last NPPES UpdateMay 20, 20222 updates tracked since enumeration

NPPES CertifiedMay 20, 2022

✔ NPI 1477085249 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians

Taxonomy Code207Y00000X

License✔ Licensed in AR · E-15155

Definition

An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.

1 MERCY LN STE 106, Hot Springs, AR 71913

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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 from Superior HealthPlan 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

Mariah Elizabeth Small-o'sullivan 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 ID4486923760

PECOS Enrollment IDI20220614001825, I20260203000832

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 Reassignments

Medicare enrollment records show Mariah Small-o'sullivan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Chi St. Vincent Medical Group Hot Springs

7.7 mi

Specialist

1 MERCY LN, SUITE 201
Hot Springs, AR 71913

Reassigned Medicare billing, Arkansas enrollment
184 clinicians in this Medicare group

NPI 1831387117 (501) 609-2229

Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc.

714 mi

Clinic/Center

2401 PLOVER RD
Plover, WI 54467

Reassigned Medicare billing, Wisconsin enrollment
935 clinicians in this Medicare group

NPI 1053080168 (715) 295-3800

Aspirus Stevens Point Hospital & Clinics, Inc.

717 mi

General Practice

3500 HOOVER RD
Stevens Point, WI 54481

Reassigned Medicare billing, Wisconsin enrollment
619 clinicians in this Medicare group

NPI 1184082745 (715) 342-7900

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 15

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 low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

163 services135 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

125 services102 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

113 services113 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

86 services86 patients

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.

69 services61 patients

Diagnostic exam of voice box using a flexible endoscope 31575

This procedure involves a doctor examining your voice box using a flexible endoscope, a thin tube with a light and camera. It's inserted through your nose or mouth to visualize your throat area. It helps detect any abnormalities in your voice box, ensuring optimal vocal health.

62 services60 patients

New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

21 services21 patients

Removal of impacted ear wax 69210

Impacted ear wax removal is a safe procedure to clear blockages in the ear canal caused by hardened ear wax. A healthcare professional uses specialized tools or a gentle irrigation method to loosen and remove the wax, improving hearing and alleviating discomfort.

16 services14 patients

Simple control of nose bleed 30901

Simple control of a nose bleed involves leaning forward slightly to prevent blood from flowing down the throat. Pinch your nostrils together and breathe through your mouth. This pressure can help the blood clot and stop the bleeding. Avoid lying down or blowing your nose.

15 services13 patients

Injection into vocal cords using an endoscope 31570

This procedure involves the use of a thin tube, called an endoscope, to access and inject medication directly into your vocal cords. It helps to treat conditions affecting your voice and swallowing. You may feel slight discomfort but it's generally well-tolerated.

15 services15 patients

Evaluation of sleep-disordered breathing by examination of upper airway using an endoscope 42975

This procedure examines your upper airway for sleep-related breathing issues. An endoscope, a thin tube with a light and camera, is gently inserted through your nose. This allows a detailed view of your airway to identify any abnormalities that could disrupt your sleep.

15 services15 patients

Incision of nasal sinus using an endoscope 31256

This procedure, called endoscopic sinus surgery, involves using a thin, flexible tube with a light and camera on the end, known as an endoscope. It's inserted into the nasal passages to view and remove obstructions in the sinuses, helping to alleviate symptoms.

14 services14 patients

Insertion of hypoglossal nerve neurostimulator electrode and generator and breathing sensor electrode 64582

This procedure involves placing a device that stimulates the hypoglossal nerve, which controls tongue movement. A generator powers the device and a sensor monitors your breathing. This helps keep the airway open during sleep, improving conditions like sleep apnea.

13 services13 patients

Partial removal of nasal sinus using an endoscope 31254

This procedure involves the use of an endoscope, a thin tube with a camera, to partially remove nasal sinus tissue. It's done to improve sinus drainage or to remove polyps, often aiding in relieving sinusitis symptoms.

11 services11 patients

Incision of eardrum with insertion of eardrum tube under local or topical anesthesia 69433

This procedure, known as a Myringotomy with Tube Insertion, involves making a small incision in the eardrum to drain fluid and relieve pressure. A tiny tube is then placed in the eardrum to prevent future fluid buildup. It's done under local or topical anesthesia.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 71913 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

$119.36 typical visit price

range $51.36 – $157.74

Typical copayment $29.84 (range $12.84 – $39.43)

Most-billed visit code 99204

Established Patient

$64.56 typical visit price

range $16.16 – $128.77

Typical copayment $16.14 (range $4.04 – $32.19)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Mariah Small-o'sullivan's NPI number?

The NPI number for Mariah Small-o'sullivan is 1477085249. It was assigned to this individual provider in the NPPES registry on March 31, 2017.

Where is Mariah Small-o'sullivan located?

Mariah Small-o'sullivan practices at 1 Mercy Ln Ste 106, Hot Springs, AR 71913. The listed phone number is (501) 609-2368.

What is Mariah Small-o'sullivan's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

Is Mariah Small-o'sullivan enrolled in Medicare?

Yes. Mariah Small-o'sullivan 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 organizations bill Medicare for Mariah Small-o'sullivan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mariah Small-o'sullivan reassigns Medicare benefits to 3 organizations: Chi St. Vincent Medical Group Hot Springs (Hot Springs, AR), Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc. (Plover, WI) and Aspirus Stevens Point Hospital & Clinics, Inc. (Stevens Point, WI). Each 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 Mariah Small-o'sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mariah Small-o'sullivan accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 3 other insurers list Mariah Small-o'sullivan 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.

When was this NPI record last updated?

The NPPES record for Mariah Small-o'sullivan was last updated on May 20, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.