NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1811948854 MD
Verify on CMS → Paul Grindstaff, MD
Neurology Physician in Crystal Lake, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 19,885 in Neurology 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 · 534 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
92%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
94.1/100
▲ 11 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Paul Grindstaff, MD reported a CMS MIPS final score of 94.1/100 - above the 83.5 national average - and filed 3,670 Medicare Part D claims in 2023.
- 94.1/100
- MIPS score · +11 vs avg
- 4K
- Part D claims, 2023
- 92%
- 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.
CMS NPPES provider registry desk
NPI 1811948854 · Neurology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ELITE · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1811948854
- ENUM-LEGACY 2006
- TAX-MID 20K Neurology Physician
- MIPS-ELITE 94.1/100
- RX-MID 3,670
- BOOK-LIGHT 856 in Illinois
- PHOTO-FINISH Igor Koralnik · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Grindstaff · thi…
Grindstaff · this provider
94.1 MIPS pts
- Punit Agrawal · …
Punit Agrawal
94.1 MIPS pts
- Igor Koralnik · …
Igor Koralnik
94.1 MIPS pts
- Paul Later · near
Paul Later
94.1 MIPS pts
- Brenda Adamovich…
Brenda Adamovich
94.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Paul Grindstaff, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
94 ≥ 73rd percentile 73% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Paul Grindstaff, MD sits
This provider among neurology physician peers
Across the 5,099 neurology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Paul Grindstaff, MD writes more Part D claims than 89% of them and scores higher on MIPS quality than 73% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one neurology physician peer from a representative sample of 60; the gold marker is Paul Grindstaff, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Paul Grindstaff, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Paul Grindstaff, MD?
High performer (top quartile)Primary specialty
Neurology Physician
Medicare Part D claims
3,670 180% vs specialty avg
MIPS final score
94.1/100 10.6 pts vs avg
Specialty distribution in Illinois
How Neurology Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Paul Grindstaff, MD's 2023 MIPS final score plotted against the Neurology Physician national average
- MIPS Final Score
- 94.1/100
- vs 83.5 national avg · 2023 performance year
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 | 1811948854 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/15/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
94.1036
Final Score
Measured-score avg: 83.5
82.5938
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Paul Grindstaff, 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.
Northwestern Medical Faculty Foundation
Crystal Lake, 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).
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 Paul Grindstaff, MD. To verify Paul Grindstaff, MD'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
Paul Grindstaff, MD - brand share 5.0%
Neurology Physician average
5% brand-name claims vs 92% generic, on 3,670 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.
3,670
Total Claims
$662K
Total Drug Cost
534
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,185
- Total Day Supply
- 181,254
- Brand vs Generic
- 5% brand / 92% generic
- Brand Drug Cost
- $425K
- Generic Drug Cost
- $235K
- Opioid Claims
- 69 (1.9% rate)
Patient Demographics
- Average Patient Age
- 71.2 years
- Avg HCC Risk Score
- 1.56
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 113, 65-74: 180, 75-84: 170, 85+: 71
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Paul Grindstaff, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Memantine Hcl
Memantine Hcl
419 claims
- Gabapentin
Gabapentin
379 claims
- Donepezil Hcl
Donepezil Hcl
324 claims
- Levetiracetam
Levetiracetam
281 claims
- Pregabalin
Pregabalin
201 claims
- Carbidopa-Levodopa 165
Carbidopa-Levodopa
165 claims
- Primidone 97
Primidone
97 claims
- Topiramate 88
Topiramate
88 claims
| Drug | Claims |
|---|---|
| Memantine Hcl | 419 |
| Gabapentin | 379 |
| Donepezil Hcl | 324 |
| Levetiracetam | 281 |
| Pregabalin | 201 |
| Carbidopa-Levodopa Carbidopa/Levodopa | 165 |
| Primidone | 97 |
| Topiramate | 88 |
| Phenobarbital | 87 |
| Methocarbamol | 84 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Paul Grindstaff, MD fits within the Neurology Physician landscape nationally.
19,885
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider
Paul Grindstaff, MD's 3,670 claims are above the specialty average of 1,309.
Nationwide Neurology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Grindstaff, both outside Illinois so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (94.1 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Neurology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Grindstaff.
One of 856 Neurology Physician providers enrolled in Illinois, 5 are shown here.
Dr. Hossam Abdelsalam
M.D.
Springfield, IL
Dr. Amro Abu Shanab
MD
Springfield, IL
Dr. Jayant Acharya
MD
Springfield, IL
Dr. Kabiyadi Acharya
M.D.
Springfield, IL
Maham Adeeb
Springfield, IL
Compare Neurology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Paul Grindstaff, MD's specialty? ▼
Paul Grindstaff, MD specializes in Neurology Physician and practices in Crystal Lake, Illinois. Credentials: MD.
How much does Paul Grindstaff, MD prescribe under Medicare Part D? ▼
In 2023, Paul Grindstaff, MD wrote 3,670 Medicare Part D claims totaling $662K in drug costs for 534 beneficiaries.
What is Paul Grindstaff, MD's Medicare quality score? ▼
Paul Grindstaff, MD has a CMS MIPS Final Score of 94.1/100 (Quality: 82.6). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Paul Grindstaff, MD located? ▼
Paul Grindstaff, MD is located at 750 EAST TERRA COTTA AVE, Crystal Lake, IL, 60014. Phone: (815) 455-1800.
What is Paul Grindstaff, MD's NPI number? ▼
Paul Grindstaff, MD's National Provider Identifier (NPI) is 1811948854, issued on 05/15/2006.
Does Paul Grindstaff, MD prescribe more brand-name or generic drugs? ▼
Paul Grindstaff, MD's prescribing is 5% brand-name and 92% generic drugs by claim count, with $425K in brand drug costs.
Does Paul Grindstaff, MD prescribe opioids? ▼
Yes, Paul Grindstaff, MD had 69 opioid claims in 2023 with an opioid prescribing rate of 1.9%.
How many Neurology Physician providers are there in the US? ▼
There are 19,885 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does Paul Grindstaff, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Paul Grindstaff, MD's most frequently prescribed drugs include Memantine Hcl, Gabapentin, Donepezil Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Paul Grindstaff, MD accept Medicare? ▼
Paul Grindstaff, MD appears in CMS Medicare data with 3,670 Part D claims and 534 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Paul Grindstaff, MD's credentials? ▼
Paul Grindstaff, MD's NPI is 1811948854 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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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
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.