2026 NPPES data Hospitalist Physician NPI 1598884454 M.D.
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GREG ICHTERTZ, M.D.

Hospitalist Physician in HATTIESBURG, Mississippi. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.

What the federal data shows

GREG ICHTERTZ, M.D. is a Hospitalist Physician in HATTIESBURG, Mississippi, listed in the federal CMS National Provider Identifier registry.

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.

Board-eligible specialty (heuristic — not verified)

GREG ICHTERTZ, M.D. 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 GREG ICHTERTZ, M.D.?

Quality data not reported

NPI registry status

Active

Issued 03/29/2007

NPI 1598884454

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Specialty distribution in Mississippi

How Hospitalist Physician compares to other specialties among Mississippi providers

Mississippi providers

Hospitalist Physician share within Mississippi

1. Hospitalist Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hospitalist Physician share within Mississippi

Specialty board-certification context

Estimated specialty board-certified rate — Hospitalist Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Hospitalist Physician ABMS/AOA estimate

Est. board-certified rate (Hospitalist Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hospitalist Physician) — ABMS / AOA estimate

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).

GREG ICHTERTZ, M.D. is a Hospitalist Physician provider practicing in HATTIESBURG, Mississippi, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1598884454. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

GREG ICHTERTZ, M.D. appears in the CMS NPPES registry as a Hospitalist Physician provider holding M.D. credentials at 415 S 28TH AVE, HATTIESBURG, MS, 39401, with a listed phone of (601) 288-4329. NPI 1598884454 was issued on 03/29/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ICHTERTZ most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D prescribing data is not currently published for this NPI, which typically means the provider either wrote fewer than 11 Part D claims in the most recent reporting year, does not participate in Medicare, or practices in a specialty that rarely prescribes outpatient drugs. Absence of prescribing data is not a quality signal — many Hospitalist Physician providers operate outside Part D entirely.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

415 S 28TH AVE
HATTIESBURG, MS 39401

Provider Details

NPI 1598884454
Specialty Hospitalist Physician
Credentials M.D.
Gender Male
NPI Issued 03/29/2007

Hospitalist Physician Overview

How GREG ICHTERTZ, M.D. fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

Nearby Hospitalist Physician Providers in Mississippi

Other clinicians with the same primary specialty enrolled in Mississippi, drawn from the same CMS NPPES roster as ICHTERTZ.

Compare Hospitalist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GREG ICHTERTZ, M.D.'s specialty?
GREG ICHTERTZ, M.D. specializes in Hospitalist Physician and practices in HATTIESBURG, Mississippi. Credentials: M.D..
Where is GREG ICHTERTZ, M.D. located?
GREG ICHTERTZ, M.D. is located at 415 S 28TH AVE, HATTIESBURG, MS, 39401. Phone: (601) 288-4329.
What is GREG ICHTERTZ, M.D.'s NPI number?
GREG ICHTERTZ, M.D.'s National Provider Identifier (NPI) is 1598884454, issued on 03/29/2007.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
Does GREG ICHTERTZ, M.D. accept Medicare?
GREG ICHTERTZ, 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 GREG ICHTERTZ, M.D.'s credentials?
GREG ICHTERTZ, M.D.'s NPI is 1598884454 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

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