2026 NPPES data Nephrology Physician NPI 1811945454 M.D.
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HAROLD GILES, M.D.

Nephrology Physician in HOMEWOOD, Alabama. 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.
Prescribing volume
2K
Medicare Part D claims · 303 beneficiaries · Nephrology Physician avg: 1K
Industry payments
$70.82
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: HAROLD GILES, M.D. is a Nephrology Physician ([object Object]) practicing in HOMEWOOD, Alabama with a Medicare Part D prescribing footprint of 2K claims across 303 beneficiaries . Industry payments of $70.82 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: HAROLD GILES, M.D. filed 2,054 Medicare Part D claims in 2023 across HOMEWOOD, Alabama. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

HAROLD GILES, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

HAROLD GILES, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 05/05/2006

NPI 1811945454

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

2,054 41% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Alabama

How Nephrology Physician compares to other specialties among Alabama providers

Alabama providers

Nephrology Physician share within Alabama

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

Specialty board-certification context

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

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

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

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

HAROLD GILES, M.D. is a Nephrology Physician provider practicing in HOMEWOOD, Alabama, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1811945454. 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.

HAROLD GILES, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 2700 ROGERS DR STE 102, HOMEWOOD, AL, 35209, with a listed phone of (205) 226-5900. NPI 1811945454 was issued on 05/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GILES 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 records for calendar year 2023 show 2,054 prescription claims written by this provider, covering 303 Medicare beneficiaries and totaling roughly $351K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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

2700 ROGERS DR STE 102
HOMEWOOD, AL 35209

Provider Details

NPI 1811945454
Specialty Nephrology Physician
Credentials M.D.
Gender Male
NPI Issued 05/05/2006

Hospital and facility affiliations

Facilities where HAROLD GILES, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

NEPHROLOGY ASSOCIATES, PC
VESTAVIA HILLS, AL

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for HAROLD GILES, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$71

Largest payer

Fresenius USA Marketing, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

2,054
Total Claims
$351K
Total Drug Cost
303
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,940
Total Day Supply
113,525
Generic Drug Cost
$91K
Antibiotic Claims
68

Patient Demographics

Average Patient Age
69.2 years
Avg HCC Risk Score
5.76
Gender Split
45% female / 55% male
Age Distribution
<65: 79, 65-74: 106, 75-84: 92, 85+: 26

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Furosemide
220
Potassium Chloride
195
Calcitriol
129
Sevelamer Carbonate
126
Nystatin
100
Auryxia
Ferric Citrate
92
Amlodipine Besylate
87
Carvedilol
71
Gentamicin Sulfate
65
Losartan Potassium
63

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nephrology Physician Overview

How HAROLD GILES, M.D. fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

HAROLD GILES, M.D.'s 2,054 claims are above the specialty average of 1,454.

Nearby Nephrology Physician Providers in Alabama

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

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

Frequently Asked Questions

What is HAROLD GILES, M.D.'s specialty?
HAROLD GILES, M.D. specializes in Nephrology Physician and practices in HOMEWOOD, Alabama. Credentials: M.D..
How much does HAROLD GILES, M.D. prescribe under Medicare Part D?
In 2023, HAROLD GILES, M.D. wrote 2,054 Medicare Part D claims totaling $351K in drug costs for 303 beneficiaries.
Where is HAROLD GILES, M.D. located?
HAROLD GILES, M.D. is located at 2700 ROGERS DR STE 102, HOMEWOOD, AL, 35209. Phone: (205) 226-5900.
What is HAROLD GILES, M.D.'s NPI number?
HAROLD GILES, M.D.'s National Provider Identifier (NPI) is 1811945454, issued on 05/05/2006.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does HAROLD GILES, M.D. prescribe most often?
Based on 2023 Medicare Part D data, HAROLD GILES, M.D.'s most frequently prescribed drugs include Furosemide, Potassium Chloride, Calcitriol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HAROLD GILES, M.D. accept Medicare?
HAROLD GILES, M.D. appears in CMS Medicare data with 2,054 Part D claims and 303 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HAROLD GILES, M.D.'s credentials?
HAROLD GILES, M.D.'s NPI is 1811945454 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.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
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