2026 NPPES data Psychiatry Physician NPI 1982629051 M.D.
Verify on CMS →

THOMAS HERRMANN, M.D.

Psychiatry Physician in DANVILLE, Illinois. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
4K
Medicare Part D claims · 215 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$24.35
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

THOMAS HERRMANN, M.D. filed 3,608 Medicare Part D claims in 2023 as a Psychiatry Physician in DANVILLE, Illinois, prescribing 98% generic.

4K
Part D claims, 2023
98%
generic prescribing
Likely
board-certified (heuristic)

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.

THOMAS HERRMANN, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

3,608 Top 9% higher than 91% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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

Board certification likely (heuristic — not verified)

THOMAS HERRMANN, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about THOMAS HERRMANN, M.D.?

Quality data not reported

NPI registry status

Active

Issued 07/12/2006

NPI 1982629051

Primary specialty

Psychiatry Physician

High-volume

53,104 US NPIs in this specialty

Medicare Part D claims

3,608 248% vs specialty avg

2023 prescription claims

Specialty avg: 1,038

Specialty distribution in Illinois

How Psychiatry Physician compares to other specialties among Illinois providers

Illinois providers

Psychiatry Physician share within Illinois

1. Psychiatry Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Psychiatry Physician share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Psychiatry Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Psychiatry Physician ABMS/AOA estimate

Est. board-certified rate (Psychiatry Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Psychiatry Physician) — ABMS / AOA estimate

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).

THOMAS HERRMANN, M.D. appears in the CMS NPPES registry as a Psychiatry Physician provider holding M.D. credentials at 311 W. FAIRCHILD STREET, DANVILLE, IL, 61832, with a listed phone of (217) 431-7898. NPI 1982629051 was issued on 07/12/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HERRMANN most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 3,608 prescription claims written by this provider, covering 215 Medicare beneficiaries and totaling roughly $211K in drug spend, split 2% brand-name and 98% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Psychiatry Physician is a high-volume specialty nationwide, with 53,104 enrolled providers across 56 states and an average of 1,038 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

311 W. FAIRCHILD STREET
DANVILLE, IL 61832

Provider Details

NPI 1982629051
Specialty Psychiatry Physician
Credentials M.D.
Gender Male
NPI Issued 07/12/2006

Hospital and facility affiliations

Facilities where THOMAS HERRMANN, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

HOOPESTON COMMUNITY MEMORIAL HOSPITAL
MATTOON, IL

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for THOMAS HERRMANN, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$24

Largest payer

Otsuka America Pharmaceutical, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context — Illinois IDFPR 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 — they are NOT specific to THOMAS HERRMANN, M.D.. To verify THOMAS HERRMANN, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

THOMAS HERRMANN, M.D. — brand share 2.0%
Specialty average (est.)

2% brand-name claims vs 98% generic, on 3,608 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.

3,608
Total Claims
$211K
Total Drug Cost
215
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,456
Total Day Supply
161,146
Brand vs Generic
2% brand / 98% generic
Brand Drug Cost
$111K
Generic Drug Cost
$100K

Patient Demographics

Average Patient Age
62.5 years
Avg HCC Risk Score
1.44
Gender Split
71% female / 29% male
Age Distribution
<65: 102, 65-74: 81, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What THOMAS HERRMANN, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Quetiapine Fumarate
374
Trazodone Hcl
212
Oxcarbazepine
207
Buspirone Hcl
200
Clonazepam
172
Paroxetine Hcl
160
Escitalopram Oxalate
156
Lamotrigine
144
Duloxetine Hcl
143
Sertraline Hcl
137

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Psychiatry Physician Overview

How THOMAS HERRMANN, M.D. fits within the Psychiatry Physician landscape nationally.

53,104
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,038
Avg Claims per Provider

THOMAS HERRMANN, M.D.'s 3,608 claims are above the specialty average of 1,038.

Nearby Psychiatry Physician Providers in Illinois

Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as HERRMANN.

Compare Psychiatry Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS HERRMANN, M.D.'s specialty?
THOMAS HERRMANN, M.D. specializes in Psychiatry Physician and practices in DANVILLE, Illinois. Credentials: M.D..
How much does THOMAS HERRMANN, M.D. prescribe under Medicare Part D?
In 2023, THOMAS HERRMANN, M.D. wrote 3,608 Medicare Part D claims totaling $211K in drug costs for 215 beneficiaries.
Where is THOMAS HERRMANN, M.D. located?
THOMAS HERRMANN, M.D. is located at 311 W. FAIRCHILD STREET, DANVILLE, IL, 61832. Phone: (217) 431-7898.
What is THOMAS HERRMANN, M.D.'s NPI number?
THOMAS HERRMANN, M.D.'s National Provider Identifier (NPI) is 1982629051, issued on 07/12/2006.
Does THOMAS HERRMANN, M.D. prescribe more brand-name or generic drugs?
THOMAS HERRMANN, M.D.'s prescribing is 2% brand-name and 98% generic drugs by claim count, with $111K in brand drug costs.
How many Psychiatry Physician providers are there in the US?
There are 53,104 Psychiatry Physician providers across 56 states in the US. The average Psychiatry Physician provider writes 1,038 Medicare Part D claims per year.
What drugs does THOMAS HERRMANN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS HERRMANN, M.D.'s most frequently prescribed drugs include Quetiapine Fumarate, Trazodone Hcl, Oxcarbazepine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS HERRMANN, M.D. accept Medicare?
THOMAS HERRMANN, M.D. appears in CMS Medicare data with 3,608 Part D claims and 215 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS HERRMANN, M.D.'s credentials?
THOMAS HERRMANN, M.D.'s NPI is 1982629051 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

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