Dr. Thomas Herbert Koerner , MD
Pediatrics • Frederick, MD
87 Thomas Johnson Dr Ste 101
Frederick, MD 217024427
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on June 15, 2005; this date does not establish years in practice.
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2018.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018. Published rows only; this is not a quality measure.
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Published Part D records, 2018:
- Valproic Acid (Valproic Acid (As Sodium Salt)) — 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
Practice Location & Contact Primary Location
87 Thomas Johnson Dr Ste 101
Frederick, MD 217024427
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Pediatrics: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
14 standardized 30-day fills in 2018
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$17 in 2018
The total cost of these prescriptions in 2018, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018.
Open Payments general payments, program year 2025
All general payments: $300.34 across 15 records.
By nature of payment
- Food and Beverage: $300.34 across 15 records.
Reporting-company totals (3 largest of 11)
- Pfizer Inc.: $45.66 across 2 records.
- Cranial Technologies, Inc: $40.83 across 2 records.
- Collegium Pharmaceutical, Inc.: $40.56 across 2 records.
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).
NPI first issued
2005
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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, “Does your provider accept Medicare as full payment?”
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.
Compared with the same specialty in Frederick and Maryland
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Koerner are from 2018.
44 active clinicians are listed under Pediatrics with a practice address in Frederick, MD (1,842 in Maryland).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Frederick
0% of these 44 clinicians have the CMS telehealth indicator.
2.3% of these 44 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.
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Medicare Part D prescriptions
CMS data for Part D prescriptions are available for 2018 only.
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30-day fills
CMS data for 30-day fills are available for 2018 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2018 only.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $666.98 in 2021 to $300.34 in 2025.
- 2021: $666.98
- 2022: $261.22
- 2023: $253.40
- 2024: $241.76
- 2025: $300.34
Sources: CMS Medicare Part D Prescribers (2018), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 – December 31, 2025): 15 records totaling $300.34.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
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TZIELD | General | $28.55 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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FLUMIST QUADRIVALENT | General | $26.01 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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TRUMENBA | General | $23.76 |
| Corium, LLC |
Food and Beverage
In-kind items and services
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Azstarys | General | $22.77 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $22.68 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
TRUMENBA | General | $21.90 |
| Cranial Technologies, Inc |
Food and Beverage
Cash or cash equivalent
|
Doc Band | General | $21.70 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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ROTATEQ | General | $19.54 |
| Cranial Technologies, Inc |
Food and Beverage
Cash or cash equivalent
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Doc Band | General | $19.13 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $17.88 |
| Seqirus USA Inc |
Food and Beverage
In-kind items and services
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Flucelvax | General | $16.84 |
| ARS Pharmaceuticals Operations, Inc. |
Food and Beverage
In-kind items and services
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NEFFY | General | $16.23 |
| Phadia US Inc. |
Food and Beverage
Cash or cash equivalent
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ImmunoCAP | General | $14.91 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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BEXSERO | General | $14.81 |
| Seqirus USA Inc |
Food and Beverage
In-kind items and services
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Flucelvax | General | $13.63 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2018.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Valproic Acid | Valproic Acid (As Sodium Salt) | 12 | 420 | $16.83 | — |
Source: CMS Part D by Provider and Drug, 2018; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-02-25NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Pediatrics
Certified Registered Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 87 THOMAS JOHNSON DR STE 101, FREDERICK, MD 217024427 (Tel: 3016940606)
Registered at 87 THOMAS JOHNSON DR STE 101, FREDERICK, MD 217024427 (Tel: 3016940606)
Pediatrics (license number reported to NPPES: MD D0084436)
NPI status registered as active in NPPES database
Registered at 321 MAIN ST, NEWPORT NEWS, VA 236013814 (Tel: 7575950358)
Registered at 321 MAIN ST, NEWPORT NEWS, VA 236013814 (Tel: 7575950358)
Recorded as THOMAS KOERNER, MD
Pediatrics (license number reported to NPPES: VA 0101045133)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Pediatrics Specialists in Frederick
Healthcare providers in FrederickMailing Address
87 Thomas Johnson Dr Ste 101
Frederick, MD 217024427
Phone: 3016940606