NPI registry status
Active
2026 NPPES data Colon & Rectal Surgery Physician NPI 1588225213
Verify on CMS → Fabian Grass
Colon & Rectal Surgery Physician in Rochester, 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 1,611 in Colon & Rectal Surgery 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.
What the federal data shows
Fabian Grass is a Colon & Rectal Surgery Physician in Rochester, Minnesota, listed in the federal CMS National Provider Identifier registry.
- #145
- Colon & Rectal Surgery Physician rank among Minnesota specialties
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 Fabian Grass
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1588225213), first enumerated 06/24/2019.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
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 1588225213 · Colon & Rectal Surgery Physician
NPI-10 · ENUM-RECENT · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1588225213
- ENUM-RECENT 2019
- TAX-NARROW 1,611
- RX-NONE No Part D
- BOOK-THIN 60 in Minnesota
- PHOTO-ENUM Danielle Dooley · 2019
◑
Board-eligible specialty (heuristic, not verified)
Fabian Grass 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 Fabian Grass?
Quality data not reportedPrimary specialty
Colon & Rectal Surgery Physician
Specialty distribution in Minnesota
How Colon & Rectal Surgery 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 Colon & Rectal Surgery 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 | 1588225213 |
|---|---|
| Specialty | Colon & Rectal Surgery Physician |
| Gender | Male |
| NPI Issued | 06/24/2019 |
Colon & Rectal Surgery Physician Overview
How Fabian Grass fits within the Colon & Rectal Surgery Physician landscape nationally.
1,611
Colon & Rectal Surgery Physician Providers in US
50
States with Colon & Rectal Surgery Physician
196
Avg Claims per Provider
Nationwide Colon & Rectal Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Grass, both outside Minnesota so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2019)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Colon & Rectal Surgery Physician Providers in Minnesota
Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as Grass.
One of 60 Colon & Rectal Surgery Physician providers enrolled in Minnesota, 5 are shown here.
Dr. Ahmed Amine Alaoui
MD
Rochester, MN
Dr. Rishi Batra
M.D.
Rochester, MN
Dr. Anne Boller
M.D.
Saint Paul, MN
Dr. Heidi Chua
MD
Rochester, MN
Dr. Robert Cima
M.D.
Rochester, MN
Compare Colon & Rectal Surgery Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Fabian Grass's specialty? ▼
Fabian Grass specializes in Colon & Rectal Surgery Physician and practices in Rochester, Minnesota.
Where is Fabian Grass located? ▼
Fabian Grass is located at 200 1ST ST SW, Rochester, MN, 55905. Phone: (507) 284-2511.
What is Fabian Grass's NPI number? ▼
Fabian Grass's National Provider Identifier (NPI) is 1588225213, issued on 06/24/2019.
How many Colon & Rectal Surgery Physician providers are there in the US? ▼
There are 1,611 Colon & Rectal Surgery Physician providers across 50 states in the US. The average Colon & Rectal Surgery Physician provider writes 196 Medicare Part D claims per year.
Does Fabian Grass accept Medicare? ▼
Fabian Grass appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Fabian Grass's credentials? ▼
Fabian Grass's NPI is 1588225213. 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.
- 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.