NPI registry status
Active
2026 NPPES data Interventional Pain Medicine Physician NPI 1104878982 MD
Verify on CMS → Gregory Masimore, MD
Interventional Pain Medicine Physician in Greenwood, 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 1,603 in Interventional Pain Medicine 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
4K
Medicare Part D claims · 199 beneficiaries · Interventional Pain Medicine Physician avg: 2K
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Gregory Masimore, MD filed 4,391 Medicare Part D claims in 2024 as an Interventional Pain Medicine Physician in Greenwood, Indiana, prescribing 97% generic.
- 4K
- Part D claims, 2024
- 97%
- generic prescribing
- ≥92nd
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Gregory Masimore, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1104878982), first enumerated 05/17/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 4,391 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1104878982 · Interventional Pain Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1104878982
- ENUM-LEGACY 2006
- TAX-NARROW 1,603
- RX-MID 4,391
- BOOK-THIN 43 in Indiana
- PHOTO-ENUM Zdenko Korunda · 2006
Gregory Masimore, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
4,391 ≥ 92nd percentile 92% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Gregory Masimore, MD 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 Gregory Masimore, MD?
Quality data not reportedPrimary specialty
Interventional Pain Medicine Physician
Medicare Part D claims
4,391 98% vs specialty avg
Specialty distribution in Indiana
How Interventional Pain Medicine Physician compares to other specialties among Indiana 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 Interventional Pain Medicine 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).
Practice Address
Provider Details
| NPI | 1104878982 |
|---|---|
| Specialty | Interventional Pain Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/17/2006 |
Brand vs generic prescribing mix · Generic-heavy
Gregory Masimore, MD - brand share 3.0%
Interventional Pain Medicine Physician average
3% brand-name claims vs 97% generic, on 4,391 2024 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 2024.
4,391
Total Claims
$186K
Total Drug Cost
199
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,550.767
- Total Day Supply
- 129,821
- Brand vs Generic
- 3% brand / 97% generic
- Brand Drug Cost
- $75K
- Generic Drug Cost
- $112K
- Opioid Claims
- 1,845 (42.0% rate)
Patient Demographics
- Average Patient Age
- 63.0 years
- Avg HCC Risk Score
- 1.92
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 104, 65-74: 68, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Gregory Masimore, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
612 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
447 claims
- Baclofen
Baclofen
437 claims
- Gabapentin
Gabapentin
385 claims
- Oxycodone Hcl
Oxycodone Hcl
352 claims
- Duloxetine Hcl 228
Duloxetine Hcl
228 claims
- Diclofenac Sodium 215
Diclofenac Sodium
215 claims
- Pregabalin 179
Pregabalin
179 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 612 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 447 |
| Baclofen | 437 |
| Gabapentin | 385 |
| Oxycodone Hcl | 352 |
| Duloxetine Hcl | 228 |
| Diclofenac Sodium | 215 |
| Pregabalin | 179 |
| Tizanidine Hcl | 146 |
| Amitriptyline Hcl | 127 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Interventional Pain Medicine Physician in IN →
All providers in Indiana →
Compare specialties →
Interventional Pain Medicine Physician Overview
How Gregory Masimore, MD fits within the Interventional Pain Medicine Physician landscape nationally.
1,603
Interventional Pain Medicine Physician Providers in US
53
States with Interventional Pain Medicine Physician
2,221
Avg Claims per Provider
Gregory Masimore, MD's 4,391 claims are above the specialty average of 2,221.
Nationwide Interventional Pain Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Masimore, both outside Indiana so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Interventional Pain Medicine Physician Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Masimore.
One of 43 Interventional Pain Medicine Physician providers enrolled in Indiana, 5 are shown here.
Dr. Anthony Alexander
M.D.
Seymour, IN
Caroline Asava
NP
Indianapolis, IN
Brian Baer
NP-C
Greenwood, IN
Dr. Roger Bailey
M.D.
Brazil, IN
Dr. George Bojrab
MD
Fort Wayne, IN
Compare Interventional Pain Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Gregory Masimore, MD's specialty? ▼
Gregory Masimore, MD specializes in Interventional Pain Medicine Physician and practices in Greenwood, Indiana. Credentials: MD.
How much does Gregory Masimore, MD prescribe under Medicare Part D? ▼
In 2024, Gregory Masimore, MD wrote 4,391 Medicare Part D claims totaling $186K in drug costs for 199 beneficiaries.
Where is Gregory Masimore, MD located? ▼
Gregory Masimore, MD is located at 730 EXECUTIVE PARK DR STE A, Greenwood, IN, 46143. Phone: (317) 346-7246.
What is Gregory Masimore, MD's NPI number? ▼
Gregory Masimore, MD's National Provider Identifier (NPI) is 1104878982, issued on 05/17/2006.
Does Gregory Masimore, MD prescribe more brand-name or generic drugs? ▼
Gregory Masimore, MD's prescribing is 3% brand-name and 97% generic drugs by claim count, with $75K in brand drug costs.
Does Gregory Masimore, MD prescribe opioids? ▼
Yes, Gregory Masimore, MD had 1,845 opioid claims in 2024 with an opioid prescribing rate of 42.0%.
How many Interventional Pain Medicine Physician providers are there in the US? ▼
There are 1,603 Interventional Pain Medicine Physician providers across 53 states in the US. The average Interventional Pain Medicine Physician provider writes 2,221 Medicare Part D claims per year.
What drugs does Gregory Masimore, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Gregory Masimore, MD'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 Gregory Masimore, MD accept Medicare? ▼
Gregory Masimore, MD appears in CMS Medicare data with 4,391 Part D claims and 199 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Masimore, MD's credentials? ▼
Gregory Masimore, MD's NPI is 1104878982 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
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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.