Dr. Maria Haejin Yoon , DO
Pediatrics β’ Silver Spring, MD
12520 Prosperity Dr Ste 150
Silver Spring, MD 209041687
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
12520 Prosperity Dr Ste 150
Silver Spring, MD 209041687
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2013
What Public CMS Data Show
Pediatrics: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2025
All general payments: $43.90 across 2 records.
By nature of payment
- Food and Beverage: $43.90 across 2 records.
Reporting-company totals
- ALK-Abello, Inc: $24.37 across 1 record.
- GlaxoSmithKline, LLC.: $19.53 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
13 years (graduated 2013)
CMS Doctors and Clinicians data list 2013 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2019
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Yoon has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Yoon as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Silver Spring and Maryland
93 active clinicians are listed under Pediatrics with a practice address in Silver Spring, MD (1,842 in Maryland).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Silver Spring
0% of these 93 clinicians have the CMS telehealth indicator.
2.2% of these 93 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $32.52 in 2020 to $43.90 in 2025.
- 2020: $32.52
- 2023: $53.03
- 2024: $36.83
- 2025: $43.90
Sources: CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $43.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ALK-Abello, Inc |
Food and Beverage
In-kind items and services
|
NEFFY | General | $24.37 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
|
BEXSERO | General | $19.53 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-03-12NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PEDIATRIC MEDICINE
I20260406000345
DC
4082189329
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 12520 PROSPERITY DR STE 150, SILVER SPRING, MD 209041687 (Tel: 3019890085)
Registered at 12520 PROSPERITY DR STE 150, SILVER SPRING, MD 209041687 (Tel: 3019890085)
Pediatrics (license number reported to NPPES: MD H0095041)
Recorded as MARIA YOON, DO
Registered at 8300 CONSTANTIN BLVD, BATON ROUGE, LA 708093489 (Tel: 2253741317)
Registered at PO BOX 83458, BATON ROUGE, LA 708843458 (Tel: 2253741317)
NPI status registered as active in NPPES database
Registered at 7777 HENNESSY BLVD, BATON ROUGE, LA 708084300 (Tel: 2257655927)
Registered at 7777 HENNESSY BLVD STE 6004, BATON ROUGE, LA 708084300 (Tel: 2257655927)
Recorded as MARIA LIM, DO
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Pediatrics Specialists in Silver Spring
- Dr. Monette Pierre-Louis, MD
- Dr. Onyinye Onyekwere, MD, MS, FAAP
- Dr. Rhonique Shields-Harris, MD, MHA
Mailing Address
12520 Prosperity Dr Ste 150
Silver Spring, MD 209041687
Phone: 3019890085