2026 NPPES data Single Specialty Group NPI 1003850066 MD
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STEVEN ZEILER, MD

Single Specialty Group in WHEAT RIDGE, 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
3K
Medicare Part D claims · 216 beneficiaries · Single Specialty Group avg: 7K
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

STEVEN ZEILER, MD filed 3,018 Medicare Part D claims in 2023 as a Single Specialty Group in WHEAT RIDGE, Colorado, prescribing 85% generic.

3K
Part D claims, 2023
85%
generic prescribing

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.

STEVEN ZEILER, MD's Medicare Part D volume vs every U.S. prescriber

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

3,018 Top 11% higher than 89% 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%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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

What does the federal data show about STEVEN ZEILER, MD?

Quality data not reported

NPI registry status

Active

Issued 06/16/2006

NPI 1003850066

Primary specialty

Single Specialty Group

Rare

24 US NPIs in this specialty

Medicare Part D claims

3,018 58% vs specialty avg

2023 prescription claims

Specialty avg: 7,180

Specialty distribution in Colorado

How Single Specialty Group compares to other specialties among Colorado providers

Colorado providers

Single Specialty Group share within Colorado

1. Single Specialty Group42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Single Specialty Group share within Colorado

Specialty board-certification context

Estimated specialty board-certified rate — Single Specialty Group (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Single Specialty Group ABMS/AOA estimate

Est. board-certified rate (Single Specialty Group) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Single Specialty Group) — 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).

STEVEN ZEILER, MD appears in the CMS NPPES registry as a Single Specialty Group provider holding MD credentials at 3885 UPHAM ST, WHEAT RIDGE, CO, 80033, with a listed phone of (720) 838-7335. NPI 1003850066 was issued on 06/16/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ZEILER 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 3,018 prescription claims written by this provider, covering 216 Medicare beneficiaries and totaling roughly $467K in drug spend, split 15% brand-name and 85% generic by claim count, with an opioid prescribing rate of 1.6%. 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.

Single Specialty Group is a narrow specialty nationwide, with 24 enrolled providers across 16 states and an average of 7,180 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

3885 UPHAM ST
WHEAT RIDGE, CO 80033

Provider Details

NPI 1003850066
Specialty Single Specialty Group
Credentials MD
Gender Male
NPI Issued 06/16/2006

Brand vs generic prescribing mix · Typical

STEVEN ZEILER, MD — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% generic, on 3,018 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.

3,018
Total Claims
$467K
Total Drug Cost
216
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,063
Total Day Supply
82,208
Brand vs Generic
15% brand / 85% generic
Brand Drug Cost
$310K
Generic Drug Cost
$156K
Opioid Claims
47 (1.6% rate)
Antibiotic Claims
40

Patient Demographics

Average Patient Age
75.0 years
Avg HCC Risk Score
2.56
Gender Split
73% female / 27% male
Age Distribution
<65: 20, 65-74: 86, 75-84: 80, 85+: 30

Top Prescribed Drugs (Medicare Part D)

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

What STEVEN ZEILER, MD 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
Atorvastatin Calcium
207
Amlodipine Besylate
132
Lisinopril
89
Levothyroxine Sodium
88
Gabapentin
85
Famotidine
81
Losartan Potassium
71
Omeprazole
71
Trazodone Hcl
63
Duloxetine Hcl
56

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

Single Specialty Group Overview

How STEVEN ZEILER, MD fits within the Single Specialty Group landscape nationally.

24
Single Specialty Group Providers in US
16
States with Single Specialty Group
7,180
Avg Claims per Provider

STEVEN ZEILER, MD's 3,018 claims are below the specialty average of 7,180.

Frequently Asked Questions

What is STEVEN ZEILER, MD's specialty?
STEVEN ZEILER, MD specializes in Single Specialty Group and practices in WHEAT RIDGE, Colorado. Credentials: MD.
How much does STEVEN ZEILER, MD prescribe under Medicare Part D?
In 2023, STEVEN ZEILER, MD wrote 3,018 Medicare Part D claims totaling $467K in drug costs for 216 beneficiaries.
Where is STEVEN ZEILER, MD located?
STEVEN ZEILER, MD is located at 3885 UPHAM ST, WHEAT RIDGE, CO, 80033. Phone: (720) 838-7335.
What is STEVEN ZEILER, MD's NPI number?
STEVEN ZEILER, MD's National Provider Identifier (NPI) is 1003850066, issued on 06/16/2006.
Does STEVEN ZEILER, MD prescribe more brand-name or generic drugs?
STEVEN ZEILER, MD's prescribing is 15% brand-name and 85% generic drugs by claim count, with $310K in brand drug costs.
Does STEVEN ZEILER, MD prescribe opioids?
Yes, STEVEN ZEILER, MD had 47 opioid claims in 2023 with an opioid prescribing rate of 1.6%.
How many Single Specialty Group providers are there in the US?
There are 24 Single Specialty Group providers across 16 states in the US. The average Single Specialty Group provider writes 7,180 Medicare Part D claims per year.
What drugs does STEVEN ZEILER, MD prescribe most often?
Based on 2023 Medicare Part D data, STEVEN ZEILER, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does STEVEN ZEILER, MD accept Medicare?
STEVEN ZEILER, MD appears in CMS Medicare data with 3,018 Part D claims and 216 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify STEVEN ZEILER, MD's credentials?
STEVEN ZEILER, MD's NPI is 1003850066 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