2026 NPPES data Nephrology Physician NPI 1932276581 MD
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MICHAEL SHOMAKER, MD

Nephrology Physician in THORNTON, Colorado. 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
631
Medicare Part D claims · 143 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$20.3K
36 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

MICHAEL SHOMAKER, MD filed 631 Medicare Part D claims in 2023 as a Nephrology Physician in THORNTON, Colorado, prescribing 92% generic.

631
Part D claims, 2023
92%
generic prescribing
$20.3K
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.

MICHAEL SHOMAKER, MD's Medicare Part D volume vs every U.S. prescriber

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

631 Top 31% higher than 69% 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%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 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)

MICHAEL SHOMAKER, 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 MICHAEL SHOMAKER, MD?

Quality data not reported

NPI registry status

Active

Issued 11/29/2006

NPI 1932276581

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

631 57% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Colorado

How Nephrology Physician compares to other specialties among Colorado providers

Colorado providers

Nephrology Physician share within Colorado

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

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).

MICHAEL SHOMAKER, MD is a Nephrology Physician provider practicing in THORNTON, Colorado, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1932276581. 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.

MICHAEL SHOMAKER, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 9195 GRANT ST STE 225, THORNTON, CO, 80229, with a listed phone of (720) 536-2460. NPI 1932276581 was issued on 11/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SHOMAKER 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 631 prescription claims written by this provider, covering 143 Medicare beneficiaries and totaling roughly $223K in drug spend, split 8% brand-name and 92% generic by claim count. 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

9195 GRANT ST STE 225
THORNTON, CO 80229

Provider Details

NPI 1932276581
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 11/29/2006

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 MICHAEL SHOMAKER, MD. Source: openpaymentsdata.cms.gov.

Total received

$20.3K

Largest payer

Boehringer Ingelheim Pharmaceuticals, 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.

Brand vs generic prescribing mix · Generic-heavy

MICHAEL SHOMAKER, MD — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 631 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

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

631
Total Claims
$223K
Total Drug Cost
143
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,653
Total Day Supply
48,760
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$191K
Generic Drug Cost
$32K
Antibiotic Claims
19

Patient Demographics

Average Patient Age
71.3 years
Avg HCC Risk Score
4.40
Gender Split
49% female / 51% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Calcitriol
55
Furosemide
53
Lisinopril
47
Amlodipine Besylate
43
Metoprolol Tartrate
43
Labetalol Hcl
42
Tamsulosin Hcl
32
Sevelamer Carbonate
20
Hydralazine Hcl
19
Allopurinol
17

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

Nephrology Physician Overview

How MICHAEL SHOMAKER, MD 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

MICHAEL SHOMAKER, MD's 631 claims are below the specialty average of 1,454.

Nearby Nephrology Physician Providers in Colorado

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

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

Frequently Asked Questions

What is MICHAEL SHOMAKER, MD's specialty?
MICHAEL SHOMAKER, MD specializes in Nephrology Physician and practices in THORNTON, Colorado. Credentials: MD.
How much does MICHAEL SHOMAKER, MD prescribe under Medicare Part D?
In 2023, MICHAEL SHOMAKER, MD wrote 631 Medicare Part D claims totaling $223K in drug costs for 143 beneficiaries.
Where is MICHAEL SHOMAKER, MD located?
MICHAEL SHOMAKER, MD is located at 9195 GRANT ST STE 225, THORNTON, CO, 80229. Phone: (720) 536-2460.
What is MICHAEL SHOMAKER, MD's NPI number?
MICHAEL SHOMAKER, MD's National Provider Identifier (NPI) is 1932276581, issued on 11/29/2006.
Does MICHAEL SHOMAKER, MD prescribe more brand-name or generic drugs?
MICHAEL SHOMAKER, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $191K in brand drug costs.
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 MICHAEL SHOMAKER, MD prescribe most often?
Based on 2023 Medicare Part D data, MICHAEL SHOMAKER, MD's most frequently prescribed drugs include Calcitriol, Furosemide, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MICHAEL SHOMAKER, MD accept Medicare?
MICHAEL SHOMAKER, MD appears in CMS Medicare data with 631 Part D claims and 143 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MICHAEL SHOMAKER, MD's credentials?
MICHAEL SHOMAKER, MD's NPI is 1932276581 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.
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