NPI registry status
Active
2026 NPPES data Specialist NPI 1003902388 M.D.
Verify on CMS → Warren Hiatt, M.D.
Specialist in Gulfport, Mississippi.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,608 in Specialist, 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
Warren Hiatt, M.D. is a Specialist in Gulfport, Mississippi, listed in the federal CMS National Provider Identifier registry.
- #33
- Specialist rank among Mississippi 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.
CMS NPPES provider registry desk
NPI 1003902388 · Specialist
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1003902388
- ENUM-LEGACY 2006
- TAX-MEGA 70K Specialist
- RX-NONE No Part D
- BOOK-THIN 281 in Mississippi
- PHOTO-ENUM Ivan Puente · 2006
What does the federal data show about Warren Hiatt, M.D.?
Quality data not reportedPrimary specialty
Specialist
Specialty distribution in Mississippi
How Specialist compares to other specialties among Mississippi 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 Specialist. 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 | 1003902388 |
|---|---|
| Specialty | Specialist |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/05/2006 |
Specialist Overview
How Warren Hiatt, M.D. fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Nationwide Specialist peers with similar MIPS or enrollment year
Two federal-record peer sets for Hiatt, both outside Mississippi 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 Specialist Providers in Mississippi
Other clinicians with the same primary specialty enrolled in Mississippi, drawn from the same CMS NPPES roster as Hiatt.
One of 281 Specialist providers enrolled in Mississippi, 5 are shown here.
Dr. John Abide
MD
Greenville, MS
Kelley Aday
Iuka, MS
Dr. Moses Adedeji
MD
Biloxi, MS
Dr. John Agnone
MD
Gulfport, MS
Dr. N Aveed Ahmed
M.D.
Jackson, MS
Compare Specialist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Warren Hiatt, M.D.'s specialty? ▼
Warren Hiatt, M.D. specializes in Specialist and practices in Gulfport, Mississippi. Credentials: M.D..
Where is Warren Hiatt, M.D. located? ▼
Warren Hiatt, M.D. is located at 4500 WEST RAILROAD STREET, Gulfport, MS, 39503. Phone: (228) 864-5155.
What is Warren Hiatt, M.D.'s NPI number? ▼
Warren Hiatt, M.D.'s National Provider Identifier (NPI) is 1003902388, issued on 10/05/2006.
How many Specialist providers are there in the US? ▼
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
Does Warren Hiatt, M.D. accept Medicare? ▼
Warren Hiatt, M.D. appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Warren Hiatt, M.D.'s credentials? ▼
Warren Hiatt, M.D.'s NPI is 1003902388 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.
- 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.