2026 NPPES data Medical Physician Assistant NPI 1730439399 PA-C
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ERIN CHENG, PA-C

Medical Physician Assistant 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
147
Medicare Part D claims · 55 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: ERIN CHENG, PA-C is a Medical Physician Assistant ([object Object]) practicing in THORNTON, Colorado with a Medicare Part D prescribing footprint of 147 claims across 55 beneficiaries — 12% brand-name prescribing .

What stands out: ERIN CHENG, PA-C filed 147 Medicare Part D claims in 2023 across THORNTON, Colorado. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

ERIN CHENG, PA-C at a glance

Quality data not reported

NPI registry status

Active

Issued 09/11/2012

NPI 1730439399

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

147 86% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

Specialty distribution in Colorado

How Medical Physician Assistant compares to other specialties among Colorado providers

Colorado providers

Medical Physician Assistant share within Colorado

1. Medical Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Medical Physician Assistant share within Colorado

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Medical Physician Assistant) — 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).

ERIN CHENG, PA-C is a Medical Physician Assistant provider practicing in THORNTON, Colorado, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1730439399. 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.

ERIN CHENG, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 1181 E 120TH AVE UNIT A, THORNTON, CO, 80233, with a listed phone of (303) 673-1500. NPI 1730439399 was issued on 09/11/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHENG 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 147 prescription claims written by this provider, covering 55 Medicare beneficiaries and totaling roughly $6K in drug spend, split 12% brand-name and 88% 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.

Medical Physician Assistant is a mid-sized specialty nationwide, with 40,527 enrolled providers across 55 states and an average of 1,077 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

1181 E 120TH AVE UNIT A
THORNTON, CO 80233

Provider Details

NPI 1730439399
Specialty Medical Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 09/11/2012

Brand vs generic prescribing mix · Typical

ERIN CHENG, PA-C — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 147 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.

147
Total Claims
$6K
Total Drug Cost
55
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
408
Total Day Supply
12,183
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$4K
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
72.7 years
Avg HCC Risk Score
0.91

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
12
Levothyroxine Sodium
11

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

Medical Physician Assistant Overview

How ERIN CHENG, PA-C fits within the Medical Physician Assistant landscape nationally.

40,527
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider

ERIN CHENG, PA-C's 147 claims are below the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in Colorado

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

Compare Medical Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is ERIN CHENG, PA-C's specialty?
ERIN CHENG, PA-C specializes in Medical Physician Assistant and practices in THORNTON, Colorado. Credentials: PA-C.
How much does ERIN CHENG, PA-C prescribe under Medicare Part D?
In 2023, ERIN CHENG, PA-C wrote 147 Medicare Part D claims totaling $6K in drug costs for 55 beneficiaries.
Where is ERIN CHENG, PA-C located?
ERIN CHENG, PA-C is located at 1181 E 120TH AVE UNIT A, THORNTON, CO, 80233. Phone: (303) 673-1500.
What is ERIN CHENG, PA-C's NPI number?
ERIN CHENG, PA-C's National Provider Identifier (NPI) is 1730439399, issued on 09/11/2012.
Does ERIN CHENG, PA-C prescribe more brand-name or generic drugs?
ERIN CHENG, PA-C's prescribing is 12% brand-name and 88% generic drugs by claim count, with $4K in brand drug costs.
How many Medical Physician Assistant providers are there in the US?
There are 40,527 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does ERIN CHENG, PA-C prescribe most often?
Based on 2023 Medicare Part D data, ERIN CHENG, PA-C's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ERIN CHENG, PA-C accept Medicare?
ERIN CHENG, PA-C appears in CMS Medicare data with 147 Part D claims and 55 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ERIN CHENG, PA-C's credentials?
ERIN CHENG, PA-C's NPI is 1730439399 with credentials PA-C. 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