1. Home
  2. Directory
  3. Missouri
  4. Saint Louis
  5. Otolaryngology
  6. NPI Profile

DR. JONATHAN YOON M.D.
NPI 1639518673
Otolaryngology in Saint Louis, MO

Active since June 24, 2013PECOS EnrolledAccepts Medicare Assignment
9701 LANDMARK PARKWAY DR STE 201, SAINT LOUIS, MO 63127(314) 843-3828(314) 843-3052 Get Directions Write a Review

NPPES record last updated: April 23, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 23, 2020, Jun 11, 2018 (2 updates tracked since 2018).

About Dr. Jonathan Yoon M.d. NPPES

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

DR. JONATHAN YOON M.D. (NPI 1639518673) is an individual otolaryngology provider in Saint Louis, Missouri, licensed in Missouri (2018007938) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1639518673
Entity TypeIndividualMale
Primary Taxonomy207Y00000X
Provider Legal NameDR. JONATHAN YOONCredential: M.D.
Location Address9701 LANDMARK PARKWAY DR STE 201Saint Louis, MO 63127
Mailing Address9701 Landmark Parkway Dr, Ste 201Saint Louis, MO 63127-1665 · (314) 729-0077 · Fax (314) 729-0101
Phone(314) 843-3828
Fax(314) 843-3052
Sole ProprietorYes
Medical School CMSOtherGraduated 2013
Enumeration DateJune 24, 2013
Last NPPES UpdateApril 23, 20202 updates tracked since enumeration
NPPES CertifiedApril 23, 2020
✔ NPI 1639518673 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians
Taxonomy Code207Y00000X
Licenses✔ Licensed in MO · 2018007938✔ Licensed in NE · 7006
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.
9701 LANDMARK PARKWAY DR STE 201, Saint Louis, MO 63127
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1621 S New Ballas Rd Ste 622ASaint Louis, MO 63141-8262 · Phone (314) 843-3828 · Fax (314) 843-3052
Location 2581225 Nebraska Medical CtrOmaha, NE 68198-1225 · Phone (402) 559-7777

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, 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. Jonathan Yoon 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 ID2668720665
PECOS Enrollment IDI20180808000932
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

5

Medicare enrollment records show Jonathan Yoon reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Gwent LLC
Same address
Otolaryngology
9701 LANDMARK PARKWAY DR STE 201
Saint Louis, MO 63127
  • Reassigned Medicare billing, Missouri enrollment
  • 15 clinicians in this Medicare group
NPI 1508494543 (314) 843-3828
Mercy Hospitals East Communities
9.9 mi
Clinic/Center
615 S NEW BALLAS RD
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 435 clinicians in this Medicare group
NPI 1851431738 (314) 251-6382
Mercy Hospital Perry
62 mi
Rural Health
206 HOSPITAL LN
Perryville, MO 63775
  • Reassigned Medicare billing, Missouri enrollment
  • 192 clinicians in this Medicare group
NPI 1215613880 (573) 547-4899
Southeast Missouri Hospital Physicians, LLC
96 mi
Family Medicine
1701 LACEY ST
Cape Girardeau, MO 63701
  • Reassigned Medicare billing, Missouri enrollment
  • 470 clinicians in this Medicare group
NPI 1558311522 (573) 331-6880
Chi Health Clinic Specialty, LLC
367 mi
Hospitalist
555 S 70TH ST
Lincoln, NE 68510
  • Reassigned Medicare billing, Nebraska enrollment
  • 525 clinicians in this Medicare group
NPI 1285138065 (402) 219-8000

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 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 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.
179 services146 patients
Test to assess middle ear function 92567
A test to assess middle ear function, also known as an impedance audiometry, helps evaluate how well your middle ear works. It measures the movement of your eardrum in response to changes in air pressure. This can help identify issues like fluid build-up, ear infections, or eardrum perforations.
136 services128 patients
Comprehensive hearing and speech recognition test 92557
A comprehensive hearing and speech recognition test assesses your ability to hear and understand spoken words. It includes hearing tests to check for issues with sound perception and speech tests to evaluate your word recognition. It's a crucial step in identifying any hearing or speech problems.
135 services128 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
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.
77 services68 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.
57 services52 patients

Hospital Affiliations CMS Care Compare 5

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

Mercy Hospital St Louis

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260020
Location615 New Ballas RoadSaint Louis, MO 63141 · St. Louis County
Emergency services Birthing friendly

Mercy Hospital Jefferson

Acute Care Hospitals · Festus, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260023
Location1400 Us Highway 61Festus, MO 63028 · Jefferson County
Emergency services

Mercy Hospital South

Acute Care Hospitals · Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260077
Location10010 Kennerly RoadSaint Louis, MO 63128 · St. Louis County
Emergency services

St Lukes Hospital

Acute Care Hospitals · Chesterfield, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260179
Location232 S Woods Mill RdChesterfield, MO 63017 · St. Louis County
Emergency services Birthing friendly

Mercy Hospital Perry

Critical Access Hospitals · Perryville, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number261311
Location434 North West StreetPerryville, MO 63775 · Perry County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63127 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
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.

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.

SOPHIA GRACE MILHOLLIN SLP
Speech-Language Pathologist
9701 LANDMARK PARKWAY DR STE 201
SAINT LOUIS, MO 63127
St. Louis County (314) 843-3828
ALLISON COLEMAN BAETEN AU.D.
Audiologist
9701 LANDMARK PARKWAY DR STE 201
SAINT LOUIS, MO 63127
St. Louis County (314) 843-3828
GWENT LLC
Otolaryngology
9701 LANDMARK PARKWAY DR STE 201
SAINT LOUIS, MO 63127
St. Louis County (314) 843-3828
DIANA JAROCKI AUD
Audiologist
9701 LANDMARK PARKWAY DR STE 201
SAINT LOUIS, MO 63127
St. Louis County (314) 843-3828
MEGAN AZAR ONDER FNP-C
Nurse Practitioner (Family)
9701 LANDMARK PARKWAY DR STE 201
SAINT LOUIS, MO 63127
St. Louis County (314) 843-3828
COURTNEY M DELAU AUD
Audiologist
9701 LANDMARK PARKWAY DR STE 201
SAINT LOUIS, MO 63127
St. Louis County (314) 843-3828

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 Jonathan Yoon's NPI number?

The NPI number for Jonathan Yoon is 1639518673. It was assigned to this individual provider in the NPPES registry on June 24, 2013.

Where is Jonathan Yoon located?

Jonathan Yoon practices at 9701 Landmark Parkway Dr Ste 201, Saint Louis, MO 63127. The listed phone number is (314) 843-3828.

What is Jonathan Yoon's specialty?

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

Is Jonathan Yoon enrolled in Medicare?

Yes. Jonathan Yoon 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 Jonathan Yoon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jonathan Yoon reassigns Medicare benefits to 5 organizations: Gwent LLC (Saint Louis, MO), Mercy Hospitals East Communities (Saint Louis, MO), Mercy Hospital Perry (Perryville, MO), Southeast Missouri Hospital Physicians, LLC (Cape Girardeau, MO) and Chi Health Clinic Specialty, LLC (Lincoln, NE). 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 Jonathan Yoon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jonathan Yoon accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 6 other insurers list Jonathan Yoon 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 Jonathan Yoon affiliated with any hospitals?

According to CMS data, Jonathan Yoon is affiliated with Mercy Hospital St Louis, Mercy Hospital Jefferson, Mercy Hospital South, St Lukes Hospital and Mercy Hospital Perry.

When was this NPI record last updated?

The NPPES record for Jonathan Yoon was last updated on April 23, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.