2026 NPPES data Pain Medicine (Anesthesiology) Physician NPI 1104900323 D.O.
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Aaron Nelson, D.O.

Pain Medicine (Anesthesiology) Physician in Fort Wayne, Indiana. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers — including 4,020 in Pain Medicine (Anesthesiology) 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
890
Medicare Part D claims · 280 beneficiaries · Pain Medicine (Anesthesiology) Physician avg: 2K
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$241.24
9 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Aaron Nelson, D.O. filed 890 Medicare Part D claims in 2023 as a Pain Medicine (Anesthesiology) Physician in Fort Wayne, Indiana, prescribing 94% generic.

890
Part D claims, 2023
94%
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.

Aaron Nelson, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

890 Top 27% higher than 73% 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%). This entry sits in this band. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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)

Aaron Nelson, D.O. 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 Aaron Nelson, D.O.?

Quality data not reported

NPI registry status

Active

Issued 10/24/2006

NPI 1104900323

Primary specialty

Pain Medicine (Anesthesiology) Physician

Niche

4,020 US NPIs in this specialty

Medicare Part D claims

890 46% vs specialty avg

2023 prescription claims

Specialty avg: 1,657

Specialty distribution in Indiana

How Pain Medicine (Anesthesiology) Physician compares to other specialties among Indiana providers

Indiana providers

Largest specialties in Indiana (% of in-state providers)

Behavior Technician — 13.6%Behavior Technician13.6%Student in an Organized Health Care Education/Training Program — 4.7%Student in an Organized Health Care Education/Training Program4.7%Pharmacist — 4.3%Pharmacist4.3%Family Nurse Practitioner — 4.2%Family Nurse Practitioner4.2%Clinical Social Worker — 4.2%Clinical Social Worker4.2%Mental Health Counselor — 4.1%Mental Health Counselor4.1%Pain Medicine (Anesthesiology) Physician — 0.1%Pain Medicine (Anesthesiology) Physician0.1%
Largest specialties in Indiana (% of in-state providers)

Specialty board-certification context

Estimated specialty board-certified rate — Pain Medicine (Anesthesiology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pain Medicine (Anesthesiology) Physician ABMS/AOA estimate

Est. board-certified rate (Pain Medicine (Anesthesiology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pain Medicine (Anesthesiology) 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).

Aaron Nelson, D.O. appears in the CMS NPPES registry as a Pain Medicine (Anesthesiology) Physician provider holding D.O. credentials at NORTHERN INDIANA VA HEALTHCARE SYSTEM, Fort Wayne, IN, 46805, with a listed phone of (260) 426-5431. NPI 1104900323 was issued on 10/24/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Nelson 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 890 prescription claims written by this provider, covering 280 Medicare beneficiaries and totaling roughly $70K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 52.7%. 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.

Pain Medicine (Anesthesiology) Physician is a narrow specialty nationwide, with 4,020 enrolled providers across 53 states and an average of 1,657 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

NORTHERN INDIANA VA HEALTHCARE SYSTEM
Fort Wayne, IN 46805

Provider Details

NPI 1104900323
Specialty Pain Medicine (Anesthesiology) Physician
Credentials D.O.
Gender Male
NPI Issued 10/24/2006

Hospital and facility affiliations

Facilities where Aaron Nelson, D.O. 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.

Pain Management Group LLC
Greencastle, 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 Aaron Nelson, D.O.. Source: openpaymentsdata.cms.gov.

Total received

$241

Largest payer

SPR Therapeutics, 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

Aaron Nelson, D.O. — brand share 6.0%
Pain Medicine (Anesthesiology) Physician average

6% brand-name claims vs 94% generic, on 890 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.

890
Total Claims
$70K
Total Drug Cost
280
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
928
Total Day Supply
20,000
Brand vs Generic
6% brand / 94% generic
Brand Drug Cost
$49K
Generic Drug Cost
$21K
Opioid Claims
469 (52.7% rate)

Patient Demographics

Average Patient Age
68.7 years
Avg HCC Risk Score
1.95
Gender Split
68% female / 33% male
Age Distribution
<65: 86, 65-74: 102, 75-84: 73, 85+: 19

Top Prescribed Drugs (Medicare Part D)

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

What Aaron Nelson, D.O. 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
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
152
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
148
Baclofen
55
Gabapentin
50
Alprazolam
42
Morphine Sulfate Er
Morphine Sulfate
41
Methylprednisolone
38
Tramadol Hcl
32
Fentanyl
31
Pregabalin
28

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

Pain Medicine (Anesthesiology) Physician Overview

How Aaron Nelson, D.O. fits within the Pain Medicine (Anesthesiology) Physician landscape nationally.

4,020
Pain Medicine (Anesthesiology) Physician Providers in US
53
States with Pain Medicine (Anesthesiology) Physician
1,657
Avg Claims per Provider

Aaron Nelson, D.O.'s 890 claims are below the specialty average of 1,657.

Nearby Pain Medicine (Anesthesiology) Physician Providers in Indiana

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

Compare Pain Medicine (Anesthesiology) 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 Indiana medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Pain Medicine (Anesthesiology) 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.

Frequently Asked Questions

What is Aaron Nelson, D.O.'s specialty?
Aaron Nelson, D.O. specializes in Pain Medicine (Anesthesiology) Physician and practices in Fort Wayne, Indiana. Credentials: D.O..
How much does Aaron Nelson, D.O. prescribe under Medicare Part D?
In 2023, Aaron Nelson, D.O. wrote 890 Medicare Part D claims totaling $70K in drug costs for 280 beneficiaries.
Where is Aaron Nelson, D.O. located?
Aaron Nelson, D.O. is located at NORTHERN INDIANA VA HEALTHCARE SYSTEM, Fort Wayne, IN, 46805. Phone: (260) 426-5431.
What is Aaron Nelson, D.O.'s NPI number?
Aaron Nelson, D.O.'s National Provider Identifier (NPI) is 1104900323, issued on 10/24/2006.
Does Aaron Nelson, D.O. prescribe more brand-name or generic drugs?
Aaron Nelson, D.O.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $49K in brand drug costs.
Does Aaron Nelson, D.O. prescribe opioids?
Yes, Aaron Nelson, D.O. had 469 opioid claims in 2023 with an opioid prescribing rate of 52.7%.
How many Pain Medicine (Anesthesiology) Physician providers are there in the US?
There are 4,020 Pain Medicine (Anesthesiology) Physician providers across 53 states in the US. The average Pain Medicine (Anesthesiology) Physician provider writes 1,657 Medicare Part D claims per year.
What drugs does Aaron Nelson, D.O. prescribe most often?
Based on 2023 Medicare Part D data, Aaron Nelson, D.O.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen, Baclofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Aaron Nelson, D.O. accept Medicare?
Aaron Nelson, D.O. appears in CMS Medicare data with 890 Part D claims and 280 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Aaron Nelson, D.O.'s credentials?
Aaron Nelson, D.O.'s NPI is 1104900323 with credentials D.O.. 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

Compiled from official public sources by the PlainDoctor editorial team.