NPI registry status
Active
2026 NPPES data Sleep Medicine (Psychiatry & Neurology) Physician NPI 1033161146 MD
Verify on CMS → Gregory Krulin, MD
Sleep Medicine (Psychiatry & Neurology) Physician in Little Rock, Arkansas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 389 in Sleep Medicine (Psychiatry & 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.
What the federal data shows
Gregory Krulin, MD is a Sleep Medicine (Psychiatry & Neurology) Physician in Little Rock, Arkansas, listed in the federal CMS National Provider Identifier registry.
- #277
- Sleep Medicine (Psychiatry & Neurology) Physician rank among Arkansas 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 Gregory Krulin, MD
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 1033161146), first enumerated 05/17/2006.
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 1033161146 · Sleep Medicine (Psychiatry & Neurology) Physician
NPI-10 · ENUM-LEGACY · TAX-TRACE · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1033161146
- ENUM-LEGACY 2006
- TAX-TRACE 389
- RX-NONE No Part D
- BOOK-THIN 5 in Arkansas
- PHOTO-ENUM Lisa Johnston, M.D. · 2006
◑
Board-eligible specialty (heuristic, not verified)
Gregory Krulin, 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 Krulin, MD?
Quality data not reportedPrimary specialty
Sleep Medicine (Psychiatry & Neurology) Physician
Specialty distribution in Arkansas
How Sleep Medicine (Psychiatry & Neurology) Physician compares to other specialties among Arkansas 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 Sleep Medicine (Psychiatry & Neurology) 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 | 1033161146 |
|---|---|
| Specialty | Sleep Medicine (Psychiatry & Neurology) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/17/2006 |
More Sleep Medicine (Psychiatry & Neurology) Physician in AR →
All providers in Arkansas →
Compare specialties →
Sleep Medicine (Psychiatry & Neurology) Physician Overview
How Gregory Krulin, MD fits within the Sleep Medicine (Psychiatry & Neurology) Physician landscape nationally.
389
Sleep Medicine (Psychiatry & Neurology) Physician Providers in US
47
States with Sleep Medicine (Psychiatry & Neurology) Physician
981
Avg Claims per Provider
Nationwide Sleep Medicine (Psychiatry & Neurology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Krulin, both outside Arkansas 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 Sleep Medicine (Psychiatry & Neurology) Physician Providers in Arkansas
Other clinicians with the same primary specialty enrolled in Arkansas, drawn from the same CMS NPPES roster as Krulin.
One of 5 Sleep Medicine (Psychiatry & Neurology) Physician providers enrolled in Arkansas, 4 are shown here.
Frequently Asked Questions
What is Gregory Krulin, MD's specialty? ▼
Gregory Krulin, MD specializes in Sleep Medicine (Psychiatry & Neurology) Physician and practices in Little Rock, Arkansas. Credentials: MD.
Where is Gregory Krulin, MD located? ▼
Gregory Krulin, MD is located at 11300 FINANCIAL CENTRE PKWY, Little Rock, AR, 72211. Phone: (501) 526-6090.
What is Gregory Krulin, MD's NPI number? ▼
Gregory Krulin, MD's National Provider Identifier (NPI) is 1033161146, issued on 05/17/2006.
How many Sleep Medicine (Psychiatry & Neurology) Physician providers are there in the US? ▼
There are 389 Sleep Medicine (Psychiatry & Neurology) Physician providers across 47 states in the US. The average Sleep Medicine (Psychiatry & Neurology) Physician provider writes 981 Medicare Part D claims per year.
Does Gregory Krulin, MD accept Medicare? ▼
Gregory Krulin, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Krulin, MD's credentials? ▼
Gregory Krulin, MD's NPI is 1033161146 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.
- 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.