2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1609864842 MD
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GRETCHEN OROSZ, MD

Geriatric Medicine (Internal Medicine) Physician in LONE TREE, 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
4K
Medicare Part D claims · 412 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

GRETCHEN OROSZ, MD filed 4,120 Medicare Part D claims in 2023 as a Geriatric Medicine (Internal Medicine) Physician in LONE TREE, Colorado, prescribing 86% generic.

4K
Part D claims, 2023
86%
generic prescribing
Likely
board-certified (heuristic)

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.

GRETCHEN OROSZ, MD's Medicare Part D volume vs every U.S. prescriber

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

4,120 Top 8% higher than 92% 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

Board certification likely (heuristic — not verified)

GRETCHEN OROSZ, MD 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).

What does the federal data show about GRETCHEN OROSZ, MD?

Quality data not reported

NPI registry status

Active

Issued 10/12/2005

NPI 1609864842

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,161 US NPIs in this specialty

Medicare Part D claims

4,120 7% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

Specialty distribution in Colorado

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Colorado providers

Colorado providers

Geriatric Medicine (Internal Medicine) Physician share within Colorado

1. Geriatric Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Internal Medicine) Physician share within Colorado

Specialty board-certification context

Estimated specialty board-certified rate — Geriatric Medicine (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Geriatric Medicine (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Geriatric Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Geriatric Medicine (Internal Medicine) 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).

GRETCHEN OROSZ, MD is a Geriatric Medicine (Internal Medicine) Physician provider practicing in LONE TREE, Colorado, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1609864842. 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.

GRETCHEN OROSZ, MD appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding MD credentials at 9540 PARK MEADOWS DR, LONE TREE, CO, 80124, with a listed phone of (720) 848-3400. NPI 1609864842 was issued on 10/12/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what OROSZ 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 4,120 prescription claims written by this provider, covering 412 Medicare beneficiaries and totaling roughly $486K in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 3.9%. 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.

Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 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

9540 PARK MEADOWS DR
LONE TREE, CO 80124

Provider Details

NPI 1609864842
Specialty Geriatric Medicine (Internal Medicine) Physician
Credentials MD
Gender Female
NPI Issued 10/12/2005

Hospital and facility affiliations

Facilities where GRETCHEN OROSZ, MD 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.

UNIVERSITY PHYSICIANS INCORPORATED
AURORA, CO

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

Brand vs generic prescribing mix · Typical

GRETCHEN OROSZ, MD — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 4,120 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.

4,120
Total Claims
$486K
Total Drug Cost
412
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
10,047
Total Day Supply
292,840
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$406K
Generic Drug Cost
$78K
Opioid Claims
160 (3.9% rate)
Antibiotic Claims
70

Patient Demographics

Average Patient Age
83.1 years
Avg HCC Risk Score
1.81
Gender Split
69% female / 31% 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
Levothyroxine Sodium
227
Amlodipine Besylate
208
Atorvastatin Calcium
208
Lisinopril
167
Duloxetine Hcl
155
Losartan Potassium
154
Trazodone Hcl
122
Tamsulosin Hcl
88
Omeprazole
81
Eliquis
Apixaban
79

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

Geriatric Medicine (Internal Medicine) Physician Overview

How GRETCHEN OROSZ, MD fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,161
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider

GRETCHEN OROSZ, MD's 4,120 claims are below the specialty average of 4,450.

Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Colorado

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

Compare Geriatric Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GRETCHEN OROSZ, MD's specialty?
GRETCHEN OROSZ, MD specializes in Geriatric Medicine (Internal Medicine) Physician and practices in LONE TREE, Colorado. Credentials: MD.
How much does GRETCHEN OROSZ, MD prescribe under Medicare Part D?
In 2023, GRETCHEN OROSZ, MD wrote 4,120 Medicare Part D claims totaling $486K in drug costs for 412 beneficiaries.
Where is GRETCHEN OROSZ, MD located?
GRETCHEN OROSZ, MD is located at 9540 PARK MEADOWS DR, LONE TREE, CO, 80124. Phone: (720) 848-3400.
What is GRETCHEN OROSZ, MD's NPI number?
GRETCHEN OROSZ, MD's National Provider Identifier (NPI) is 1609864842, issued on 10/12/2005.
Does GRETCHEN OROSZ, MD prescribe more brand-name or generic drugs?
GRETCHEN OROSZ, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $406K in brand drug costs.
Does GRETCHEN OROSZ, MD prescribe opioids?
Yes, GRETCHEN OROSZ, MD had 160 opioid claims in 2023 with an opioid prescribing rate of 3.9%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US?
There are 4,161 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does GRETCHEN OROSZ, MD prescribe most often?
Based on 2023 Medicare Part D data, GRETCHEN OROSZ, MD's most frequently prescribed drugs include Levothyroxine Sodium, Amlodipine Besylate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GRETCHEN OROSZ, MD accept Medicare?
GRETCHEN OROSZ, MD appears in CMS Medicare data with 4,120 Part D claims and 412 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GRETCHEN OROSZ, MD's credentials?
GRETCHEN OROSZ, MD's NPI is 1609864842 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