2026 NPPES data Hepatology Physician NPI 1639126980 MD
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ESTER LITTLE, MD

Hepatology Physician in PHOENIX, Arizona. 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

ESTER LITTLE, MD is a Hepatology Physician in PHOENIX, Arizona, 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)

ESTER LITTLE, 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 ESTER LITTLE, MD?

Quality data not reported

NPI registry status

Active

Issued 05/30/2006

NPI 1639126980

Primary specialty

Hepatology Physician

Rare

281 US NPIs in this specialty

Specialty distribution in Arizona

How Hepatology Physician compares to other specialties among Arizona providers

Arizona providers

Hepatology Physician share within Arizona

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Hepatology 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).

ESTER LITTLE, MD appears in the CMS NPPES registry as a Hepatology Physician provider holding MD credentials at 1300 N 12TH ST, PHOENIX, AZ, 85006, with a listed phone of (602) 839-2606. NPI 1639126980 was issued on 05/30/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LITTLE 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 Hepatology Physician providers operate outside Part D entirely.

Hepatology Physician is a narrow specialty nationwide, with 281 enrolled providers across 36 states and an average of 803 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

1300 N 12TH ST
PHOENIX, AZ 85006

Provider Details

NPI 1639126980
Specialty Hepatology Physician
Credentials MD
Gender Female
NPI Issued 05/30/2006

Hepatology Physician Overview

How ESTER LITTLE, MD fits within the Hepatology Physician landscape nationally.

281
Hepatology Physician Providers in US
36
States with Hepatology Physician
803
Avg Claims per Provider

Nearby Hepatology Physician Providers in Arizona

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

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

Frequently Asked Questions

What is ESTER LITTLE, MD's specialty?
ESTER LITTLE, MD specializes in Hepatology Physician and practices in PHOENIX, Arizona. Credentials: MD.
Where is ESTER LITTLE, MD located?
ESTER LITTLE, MD is located at 1300 N 12TH ST, PHOENIX, AZ, 85006. Phone: (602) 839-2606.
What is ESTER LITTLE, MD's NPI number?
ESTER LITTLE, MD's National Provider Identifier (NPI) is 1639126980, issued on 05/30/2006.
How many Hepatology Physician providers are there in the US?
There are 281 Hepatology Physician providers across 36 states in the US. The average Hepatology Physician provider writes 803 Medicare Part D claims per year.
Does ESTER LITTLE, MD accept Medicare?
ESTER LITTLE, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ESTER LITTLE, MD's credentials?
ESTER LITTLE, MD's NPI is 1639126980 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

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