NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1871810630 M.D.
Verify on CMS → Erin Grimsby, M.D.
Physical Medicine & Rehabilitation Physician in Duluth, Minnesota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,618 in Physical Medicine & Rehabilitation 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
468
Medicare Part D claims · 111 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 793
What the federal data shows
Erin Grimsby, M.D. filed 468 Medicare Part D claims in 2024 as a Physical Medicine & Rehabilitation Physician in Duluth, Minnesota.
- 468
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥61st
- 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 Erin Grimsby, M.D.
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 1871810630), first enumerated 05/03/2010.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 468 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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.
Compare Grimsby with other Physical Medicine & Rehabilitation Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Minnesota
- Dr. Jeremy Adam, M.D. Minneapolis, MN
- Dr. Mark Agre, MD Bloomington, MN
- Dr. William Ahlenius, M.D. Maplewood, MN
- Dr. Cara Ahlgrim, DPT, PT Saint Paul, MN
- Dr. Andrew Alexander, MD Rochester, MN
- Dr. Mohamed Alfath, DO Saint Paul, MN
Other specialties in Duluth: Clinical Social Worker (287) · Physical Therapist (240) · Student in an Organized Health Care Education/Training Program (187) · Behavior Technician (171)
CMS NPPES provider registry desk
NPI 1871810630 · Physical Medicine & Rehabilitation Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1871810630
- ENUM-MID 2010
- TAX-MID 16K Physical Medicine
- RX-LIGHT 468
- BOOK-THIN 326 in Minnesota
- PHOTO-ENUM Eric Kim, M.D. · 2010
Erin Grimsby, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
468 ≥ 61st percentile 61% 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 certification likely (heuristic, not verified)
Erin Grimsby, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Erin Grimsby, M.D.?
Quality data not reportedPrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
468 41% vs specialty avg
Specialty distribution in Minnesota
How Physical Medicine & Rehabilitation Physician compares to other specialties among Minnesota 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 Physical Medicine & Rehabilitation 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 | 1871810630 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 05/03/2010 |
Hospital and facility affiliations
Facilities where Erin Grimsby, 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.
Polinsky Medical Rehabilitation Center
Duluth, MN
The Duluth Clinic Ltd
Duluth, MN
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
468
Total Claims
$14K
Total Drug Cost
111
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 674.133
- Total Day Supply
- 18,515
- Generic Drug Cost
- $10K
- Opioid Claims
- 11 (2.4% rate)
Patient Demographics
- Average Patient Age
- 66.3 years
- Avg HCC Risk Score
- 1.44
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 34, 65-74: 52, 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 Erin Grimsby, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Baclofen
Baclofen
100 claims
- Gabapentin
Gabapentin
98 claims
- Atorvastatin Calcium 34
Atorvastatin Calcium
34 claims
- Tizanidine Hcl 28
Tizanidine Hcl
28 claims
- Pregabalin 19
Pregabalin
19 claims
- Trazodone Hcl 18
Trazodone Hcl
18 claims
- Methocarbamol 16
Methocarbamol
16 claims
- Tamsulosin Hcl 16
Tamsulosin Hcl
16 claims
| Drug | Claims |
|---|---|
| Baclofen | 100 |
| Gabapentin | 98 |
| Atorvastatin Calcium | 34 |
| Tizanidine Hcl | 28 |
| Pregabalin | 19 |
| Trazodone Hcl | 18 |
| Methocarbamol | 16 |
| Tamsulosin Hcl | 16 |
| Methylprednisolone | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Physical Medicine & Rehabilitation Physician in MN →
All providers in Minnesota →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How Erin Grimsby, M.D. fits within the Physical Medicine & Rehabilitation Physician landscape nationally.
15,618
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
793
Avg Claims per Provider
Erin Grimsby, M.D.'s 468 claims are below the specialty average of 793.
Nationwide Physical Medicine & Rehabilitation Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Grimsby, both outside Minnesota so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2010)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physical Medicine & Rehabilitation Physician Providers in Minnesota
Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as Grimsby.
One of 326 Physical Medicine & Rehabilitation Physician providers enrolled in Minnesota, 11 are shown on this page.
Dr. Jessica Alm Martin
DO
Mankato, MN
Dr. Miriam Alpert
DO
Rochester, MN
Dr. Paul Amundson
MD
Saint Louis Park, MN
Dr. Josie Anderson
DPT
Pine City, MN
Dr. Karen Andrews
M.D.
Rochester, MN
Compare Physical Medicine & Rehabilitation Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Erin Grimsby, M.D.'s specialty? ▼
Erin Grimsby, M.D. specializes in Physical Medicine & Rehabilitation Physician and practices in Duluth, Minnesota. Credentials: M.D..
How much does Erin Grimsby, M.D. prescribe under Medicare Part D? ▼
In 2024, Erin Grimsby, M.D. wrote 468 Medicare Part D claims totaling $14K in drug costs for 111 beneficiaries.
Where is Erin Grimsby, M.D. located? ▼
Erin Grimsby, M.D. is located at 400 EAST THIRD STREET, Duluth, MN, 55805. Phone: (218) 786-8364.
What is Erin Grimsby, M.D.'s NPI number? ▼
Erin Grimsby, M.D.'s National Provider Identifier (NPI) is 1871810630, issued on 05/03/2010.
Does Erin Grimsby, M.D. prescribe opioids? ▼
Yes, Erin Grimsby, M.D. had 11 opioid claims in 2024 with an opioid prescribing rate of 2.4%.
How many Physical Medicine & Rehabilitation Physician providers are there in the US? ▼
There are 15,618 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 793 Medicare Part D claims per year.
What drugs does Erin Grimsby, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Erin Grimsby, M.D.'s most frequently prescribed drugs include Baclofen, Gabapentin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Erin Grimsby, M.D. accept Medicare? ▼
Erin Grimsby, M.D. appears in CMS Medicare data with 468 Part D claims and 111 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Erin Grimsby, M.D.'s credentials? ▼
Erin Grimsby, M.D.'s NPI is 1871810630 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
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 September 2026.