2026 NPPES data Obstetrics & Gynecology Physician NPI 1134256175 MD
Verify on CMS →

DIANE WINTERS, MD

Obstetrics & Gynecology Physician in LAFAYETTE, 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
125
Medicare Part D claims · 59 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

DIANE WINTERS, MD filed 125 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in LAFAYETTE, Colorado, prescribing 87% generic.

125
Part D claims, 2023
87%
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.

DIANE WINTERS, MD's Medicare Part D volume vs every U.S. prescriber

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

125 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 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)

DIANE WINTERS, 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 DIANE WINTERS, MD?

Quality data not reported

NPI registry status

Active

Issued 02/27/2007

NPI 1134256175

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

125 30% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in Colorado

How Obstetrics & Gynecology Physician compares to other specialties among Colorado providers

Colorado providers

Obstetrics & Gynecology Physician share within Colorado

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

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology 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).

DIANE WINTERS, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 280 EXEMPLA CIR, LAFAYETTE, CO, 80026, with a listed phone of (303) 338-4545. NPI 1134256175 was issued on 02/27/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WINTERS 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 125 prescription claims written by this provider, covering 59 Medicare beneficiaries and totaling roughly $6K in drug spend, split 13% brand-name and 87% 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.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 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

280 EXEMPLA CIR
LAFAYETTE, CO 80026

Provider Details

NPI 1134256175
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Female
NPI Issued 02/27/2007

Brand vs generic prescribing mix · Typical

DIANE WINTERS, MD — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 125 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.

125
Total Claims
$6K
Total Drug Cost
59
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
269
Total Day Supply
7,411
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$2K
Generic Drug Cost
$5K

Patient Demographics

Average Patient Age
71.7 years
Avg HCC Risk Score
0.65
Gender Split
100% female / 0% 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
Estradiol
58
Clobetasol Propionate
20

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

Obstetrics & Gynecology Physician Overview

How DIANE WINTERS, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

DIANE WINTERS, MD's 125 claims are below the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Colorado

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

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is DIANE WINTERS, MD's specialty?
DIANE WINTERS, MD specializes in Obstetrics & Gynecology Physician and practices in LAFAYETTE, Colorado. Credentials: MD.
How much does DIANE WINTERS, MD prescribe under Medicare Part D?
In 2023, DIANE WINTERS, MD wrote 125 Medicare Part D claims totaling $6K in drug costs for 59 beneficiaries.
Where is DIANE WINTERS, MD located?
DIANE WINTERS, MD is located at 280 EXEMPLA CIR, LAFAYETTE, CO, 80026. Phone: (303) 338-4545.
What is DIANE WINTERS, MD's NPI number?
DIANE WINTERS, MD's National Provider Identifier (NPI) is 1134256175, issued on 02/27/2007.
Does DIANE WINTERS, MD prescribe more brand-name or generic drugs?
DIANE WINTERS, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $2K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does DIANE WINTERS, MD prescribe most often?
Based on 2023 Medicare Part D data, DIANE WINTERS, MD's most frequently prescribed drugs include Estradiol, Clobetasol Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DIANE WINTERS, MD accept Medicare?
DIANE WINTERS, MD appears in CMS Medicare data with 125 Part D claims and 59 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DIANE WINTERS, MD's credentials?
DIANE WINTERS, MD's NPI is 1134256175 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