2026 NPPES data Psychiatry Physician NPI 1891779922 MD
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CHARLES CLASS, MD

Psychiatry Physician in INDIANAPOLIS, Indiana. 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
6K
Medicare Part D claims · 267 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$114.81
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

CHARLES CLASS, MD filed 5,679 Medicare Part D claims in 2023 as a Psychiatry Physician in INDIANAPOLIS, Indiana, prescribing 98% generic.

6K
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.

CHARLES CLASS, MD's Medicare Part D volume vs every U.S. prescriber

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

5,679 Top 5% higher than 95% 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)

CHARLES CLASS, MD 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 CHARLES CLASS, MD?

Quality data not reported

NPI registry status

Active

Issued 12/02/2005

NPI 1891779922

Primary specialty

Psychiatry Physician

High-volume

53,104 US NPIs in this specialty

Medicare Part D claims

5,679 447% vs specialty avg

2023 prescription claims

Specialty avg: 1,038

Specialty distribution in Indiana

How Psychiatry Physician compares to other specialties among Indiana providers

Indiana providers

Psychiatry Physician share within Indiana

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

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).

CHARLES CLASS, MD is a Psychiatry Physician provider practicing in INDIANAPOLIS, Indiana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1891779922. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

CHARLES CLASS, MD appears in the CMS NPPES registry as a Psychiatry Physician provider holding MD credentials at 8401 HARCOURT RD, INDIANAPOLIS, IN, 46260, with a listed phone of (317) 338-4600. NPI 1891779922 was issued on 12/02/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLASS 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 5,679 prescription claims written by this provider, covering 267 Medicare beneficiaries and totaling roughly $236K 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

8401 HARCOURT RD
INDIANAPOLIS, IN 46260

Provider Details

NPI 1891779922
Specialty Psychiatry Physician
Credentials MD
Gender Male
NPI Issued 12/02/2005

Hospital and facility affiliations

Facilities where CHARLES CLASS, MD 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.

ST. VINCENT HOSPITAL AND HEALTH CARE CENTER, INC.
INDIANAPOLIS, IN

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 CHARLES CLASS, MD. Source: openpaymentsdata.cms.gov.

Total received

$115

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.

Brand vs generic prescribing mix · Generic-heavy

CHARLES CLASS, MD — brand share 2.0%
Specialty average (est.)

2% brand-name claims vs 98% generic, on 5,679 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.

5,679
Total Claims
$236K
Total Drug Cost
267
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,900
Total Day Supply
138,265
Brand vs Generic
2% brand / 98% generic
Brand Drug Cost
$35K
Generic Drug Cost
$202K

Patient Demographics

Average Patient Age
71.4 years
Avg HCC Risk Score
1.53
Gender Split
68% female / 32% male
Age Distribution
<65: 72, 65-74: 62, 75-84: 92, 85+: 41

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Sertraline Hcl
511
Ziprasidone Hcl
393
Aripiprazole
379
Quetiapine Fumarate
361
Buspirone Hcl
342
Escitalopram Oxalate
328
Risperidone
277
Venlafaxine Hcl Er
Venlafaxine Hcl
245
Lamotrigine
244
Trazodone Hcl
238

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

Psychiatry Physician Overview

How CHARLES CLASS, MD 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

CHARLES CLASS, MD's 5,679 claims are above the specialty average of 1,038.

Nearby Psychiatry Physician Providers in Indiana

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

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

Frequently Asked Questions

What is CHARLES CLASS, MD's specialty?
CHARLES CLASS, MD specializes in Psychiatry Physician and practices in INDIANAPOLIS, Indiana. Credentials: MD.
How much does CHARLES CLASS, MD prescribe under Medicare Part D?
In 2023, CHARLES CLASS, MD wrote 5,679 Medicare Part D claims totaling $236K in drug costs for 267 beneficiaries.
Where is CHARLES CLASS, MD located?
CHARLES CLASS, MD is located at 8401 HARCOURT RD, INDIANAPOLIS, IN, 46260. Phone: (317) 338-4600.
What is CHARLES CLASS, MD's NPI number?
CHARLES CLASS, MD's National Provider Identifier (NPI) is 1891779922, issued on 12/02/2005.
Does CHARLES CLASS, MD prescribe more brand-name or generic drugs?
CHARLES CLASS, MD's prescribing is 2% brand-name and 98% generic drugs by claim count, with $35K 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 CHARLES CLASS, MD prescribe most often?
Based on 2023 Medicare Part D data, CHARLES CLASS, MD's most frequently prescribed drugs include Sertraline Hcl, Ziprasidone Hcl, Aripiprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES CLASS, MD accept Medicare?
CHARLES CLASS, MD appears in CMS Medicare data with 5,679 Part D claims and 267 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES CLASS, MD's credentials?
CHARLES CLASS, MD's NPI is 1891779922 with credentials MD. 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