2026 NPPES data Gastroenterology Physician NPI 1649213182 M.D.
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JOHN DAY, M.D.

Gastroenterology Physician in ALABASTER, 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 · 640 beneficiaries · Gastroenterology Physician avg: 833
Industry payments
$1.6K
101 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

JOHN DAY, M.D. filed 1,769 Medicare Part D claims in 2023 as a Gastroenterology Physician in ALABASTER, Alabama.

2K
Part D claims, 2023
$1.6K
industry payments (Sunshine Act)

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.

JOHN DAY, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,769 Top 17% higher than 83% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). This entry sits in this band. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic — not verified)

JOHN DAY, 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 JOHN DAY, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/13/2006

NPI 1649213182

Primary specialty

Gastroenterology Physician

Mid-sized

16,567 US NPIs in this specialty

Medicare Part D claims

1,769 112% vs specialty avg

2023 prescription claims

Specialty avg: 833

Specialty distribution in Alabama

How Gastroenterology Physician compares to other specialties among Alabama providers

Alabama providers

Gastroenterology Physician share within Alabama

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

Specialty board-certification context

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

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

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

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

JOHN DAY, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 1010 1ST ST N, ALABASTER, AL, 35007, with a listed phone of (205) 663-1023. NPI 1649213182 was issued on 06/13/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DAY 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 1,769 prescription claims written by this provider, covering 640 Medicare beneficiaries and totaling roughly $178K 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.

Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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

1010 1ST ST N
ALABASTER, AL 35007

Provider Details

NPI 1649213182
Specialty Gastroenterology Physician
Credentials M.D.
Gender Male
NPI Issued 06/13/2006

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 JOHN DAY, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.6K

Largest payer

ABBVIE 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.

1,769
Total Claims
$178K
Total Drug Cost
640
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,718
Total Day Supply
70,660
Generic Drug Cost
$81K
Antibiotic Claims
33

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
1.17
Gender Split
63% female / 37% male
Age Distribution
<65: 78, 65-74: 350, 75-84: 180, 85+: 32

Top Prescribed Drugs (Medicare Part D)

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

What JOHN DAY, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Pantoprazole Sodium
388
Omeprazole
137
Dicyclomine Hcl
109
Famotidine
105
Sucralfate
103
Lansoprazole
83
Colestipol Hcl
78
Clenpiq
Sod Picosulf/Mag Ox/Citric Ac
67
Linzess
Linaclotide
49
Metoclopramide Hcl
40

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

Gastroenterology Physician Overview

How JOHN DAY, M.D. fits within the Gastroenterology Physician landscape nationally.

16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider

JOHN DAY, M.D.'s 1,769 claims are above the specialty average of 833.

Nearby Gastroenterology Physician Providers in Alabama

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

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

Frequently Asked Questions

What is JOHN DAY, M.D.'s specialty?
JOHN DAY, M.D. specializes in Gastroenterology Physician and practices in ALABASTER, Alabama. Credentials: M.D..
How much does JOHN DAY, M.D. prescribe under Medicare Part D?
In 2023, JOHN DAY, M.D. wrote 1,769 Medicare Part D claims totaling $178K in drug costs for 640 beneficiaries.
Where is JOHN DAY, M.D. located?
JOHN DAY, M.D. is located at 1010 1ST ST N, ALABASTER, AL, 35007. Phone: (205) 663-1023.
What is JOHN DAY, M.D.'s NPI number?
JOHN DAY, M.D.'s National Provider Identifier (NPI) is 1649213182, issued on 06/13/2006.
How many Gastroenterology Physician providers are there in the US?
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does JOHN DAY, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JOHN DAY, M.D.'s most frequently prescribed drugs include Pantoprazole Sodium, Omeprazole, Dicyclomine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOHN DAY, M.D. accept Medicare?
JOHN DAY, M.D. appears in CMS Medicare data with 1,769 Part D claims and 640 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOHN DAY, M.D.'s credentials?
JOHN DAY, M.D.'s NPI is 1649213182 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