NPI registry status
Active
2026 NPPES data Child & Adolescent Psychiatry Physician NPI 1992948277 M.D.
Verify on CMS → Grace Thammasuvimol, M.D.
Child & Adolescent Psychiatry Physician in Frederick, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,164 in Child & Adolescent Psychiatry Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
131
Medicare Part D claims · Child & Adolescent Psychiatry Physician avg: 600
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Grace Thammasuvimol, M.D. filed 131 Medicare Part D claims in 2023 as a Child & Adolescent Psychiatry Physician in Frederick, Maryland, prescribing 87% generic.
- 131
- Part D claims, 2023
- 87%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Grace Thammasuvimol, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
131 35th percentile higher than 35% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
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Board-eligible specialty (heuristic, not verified)
Grace Thammasuvimol, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Grace Thammasuvimol, M.D.?
Quality data not reportedPrimary specialty
Child & Adolescent Psychiatry Physician
Medicare Part D claims
131 78% vs specialty avg
Specialty distribution in Maryland
How Child & Adolescent Psychiatry Physician compares to other specialties among Maryland providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Child & Adolescent Psychiatry Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Grace Thammasuvimol, M.D. appears in the CMS NPPES registry as a Child & Adolescent Psychiatry Physician provider holding M.D. credentials at 170 THOMAS JOHNSON DR STE 200, Frederick, MD, 21702, with a listed phone of (301) 695-8390. NPI 1992948277 was issued on 04/15/2009.
Medicare Part D records for calendar year 2023 show 131 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $12K in drug spend, split 13% brand-name and 87% generic by claim count.
Child & Adolescent Psychiatry Physician is a mid-sized specialty nationwide, with 6,164 enrolled providers across 54 states and an average of 600 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1992948277 |
|---|---|
| Specialty | Child & Adolescent Psychiatry Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 04/15/2009 |
Brand vs generic prescribing mix · Typical
Grace Thammasuvimol, M.D. - brand share 13.0%
Child & Adolescent Psychiatry Physician average
13% brand-name claims vs 87% generic, on 131 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
131
Total Claims
$12K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 285
- Total Day Supply
- 8,534
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $6K
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 51.4 years
- Avg HCC Risk Score
- 0.59
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Grace Thammasuvimol, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sertraline Hcl
Sertraline Hcl
22 claims
- Lamotrigine
Lamotrigine
20 claims
- Buspirone Hcl
Buspirone Hcl
16 claims
| Drug | Claims |
|---|---|
| Sertraline Hcl | 22 |
| Lamotrigine | 20 |
| Buspirone Hcl | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Child & Adolescent Psychiatry Physician in MD →
All providers in Maryland →
Compare specialties →
Child & Adolescent Psychiatry Physician Overview
How Grace Thammasuvimol, M.D. fits within the Child & Adolescent Psychiatry Physician landscape nationally.
6,164
Child & Adolescent Psychiatry Physician Providers in US
54
States with Child & Adolescent Psychiatry Physician
600
Avg Claims per Provider
Grace Thammasuvimol, M.D.'s 131 claims are below the specialty average of 600.
Nearby Child & Adolescent Psychiatry Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Thammasuvimol.
Dr. Gathi Abraham
M.D., M.P.H.
Bethesda, MD
Dr. Carlin Alleyne
M.D.
Baltimore, MD
Dr. Tahani Alqassem
M.D
Towson, MD
Dr. Loren Amdursky
M.D.
Chevy Chase, MD
Dr. Christopher Andersen
MD
Bethesda, MD
Compare Child & Adolescent Psychiatry Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Maryland medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Child & Adolescent Psychiatry Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Grace Thammasuvimol, M.D.'s specialty? ▼
Grace Thammasuvimol, M.D. specializes in Child & Adolescent Psychiatry Physician and practices in Frederick, Maryland. Credentials: M.D..
How much does Grace Thammasuvimol, M.D. prescribe under Medicare Part D? ▼
In 2023, Grace Thammasuvimol, M.D. wrote 131 Medicare Part D claims totaling $12K in drug costs for N/A beneficiaries.
Where is Grace Thammasuvimol, M.D. located? ▼
Grace Thammasuvimol, M.D. is located at 170 THOMAS JOHNSON DR STE 200, Frederick, MD, 21702. Phone: (301) 695-8390.
What is Grace Thammasuvimol, M.D.'s NPI number? ▼
Grace Thammasuvimol, M.D.'s National Provider Identifier (NPI) is 1992948277, issued on 04/15/2009.
Does Grace Thammasuvimol, M.D. prescribe more brand-name or generic drugs? ▼
Grace Thammasuvimol, M.D.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $6K in brand drug costs.
How many Child & Adolescent Psychiatry Physician providers are there in the US? ▼
There are 6,164 Child & Adolescent Psychiatry Physician providers across 54 states in the US. The average Child & Adolescent Psychiatry Physician provider writes 600 Medicare Part D claims per year.
What drugs does Grace Thammasuvimol, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Grace Thammasuvimol, M.D.'s most frequently prescribed drugs include Sertraline Hcl, Lamotrigine, Buspirone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Grace Thammasuvimol, M.D. accept Medicare? ▼
Grace Thammasuvimol, M.D. appears in CMS Medicare data with 131 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Grace Thammasuvimol, M.D.'s credentials? ▼
Grace Thammasuvimol, M.D.'s NPI is 1992948277 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.