NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1184738122 M.D.
Verify on CMS → Susan Gass, M.D.
Dermatology Physician in Hillsboro, Oregon.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 14,645 in Dermatology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
100
Medicare Part D claims · 40 beneficiaries · Dermatology Physician avg: 729
Generic prescribing
66%
generic claims · 34% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Susan Gass, M.D. filed 100 Medicare Part D claims in 2023 as a Dermatology Physician in Hillsboro, Oregon, prescribing 66% generic.
- 100
- Part D claims, 2023
- 66%
- 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.
Susan Gass, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
100 35th percentile higher than 35% of 1,370,886 prescribers
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)
Susan Gass, M.D. 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 Susan Gass, M.D.?
Quality data not reportedPrimary specialty
Dermatology Physician
Medicare Part D claims
100 86% vs specialty avg
Specialty distribution in Oregon
How Dermatology Physician compares to other specialties among Oregon providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Dermatology Physician. Verify directly:
How MIPS and board certification work
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).
Susan Gass, M.D. appears in the CMS NPPES registry as a Dermatology Physician provider holding M.D. credentials at 10315 NE TANASBOURNE DR, Hillsboro, OR, 97124, with a listed phone of (503) 495-8605. NPI 1184738122 was issued on 08/18/2006.
Medicare Part D records for calendar year 2023 show 100 prescription claims written by this provider, covering 40 Medicare beneficiaries and totaling roughly $21K in drug spend, split 34% brand-name and 66% generic by claim count.
Dermatology Physician is a mid-sized specialty nationwide, with 14,645 enrolled providers across 53 states and an average of 729 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
Provider Details
| NPI | 1184738122 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 08/18/2006 |
Brand vs generic prescribing mix · Above average
Susan Gass, M.D. - brand share 34.0%
Dermatology Physician average
34% brand-name claims vs 66% generic, on 100 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.
100
Total Claims
$21K
Total Drug Cost
40
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 136
- Total Day Supply
- 4,056
- Brand vs Generic
- 34% brand / 66% generic
- Brand Drug Cost
- $19K
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 0.79
- Gender Split
- 60% female / 40% 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 |
|---|---|
| Retin-A Tretinoin | 17 |
| Metronidazole | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How Susan Gass, M.D. fits within the Dermatology Physician landscape nationally.
14,645
Dermatology Physician Providers in US
53
States with Dermatology Physician
729
Avg Claims per Provider
Susan Gass, M.D.'s 100 claims are below the specialty average of 729.
Nearby Dermatology Physician Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Gass.
Dr. Michael Adler
M.D.
Portland, OR
Dr. Jonathan Alexander
M.D.
Portland, OR
Dr. Dawn Allison
MD
Central Point, OR
Dr. Robert Amon
M.D.
Portland, OR
Dr. Edward Atkin
MD
Hillsboro, OR
Compare Dermatology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Oregon medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Dermatology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Susan Gass, M.D.'s specialty? ▼
Susan Gass, M.D. specializes in Dermatology Physician and practices in Hillsboro, Oregon. Credentials: M.D..
How much does Susan Gass, M.D. prescribe under Medicare Part D? ▼
In 2023, Susan Gass, M.D. wrote 100 Medicare Part D claims totaling $21K in drug costs for 40 beneficiaries.
Where is Susan Gass, M.D. located? ▼
Susan Gass, M.D. is located at 10315 NE TANASBOURNE DR, Hillsboro, OR, 97124. Phone: (503) 495-8605.
What is Susan Gass, M.D.'s NPI number? ▼
Susan Gass, M.D.'s National Provider Identifier (NPI) is 1184738122, issued on 08/18/2006.
Does Susan Gass, M.D. prescribe more brand-name or generic drugs? ▼
Susan Gass, M.D.'s prescribing is 34% brand-name and 66% generic drugs by claim count, with $19K in brand drug costs.
How many Dermatology Physician providers are there in the US? ▼
There are 14,645 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 729 Medicare Part D claims per year.
What drugs does Susan Gass, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Susan Gass, M.D.'s most frequently prescribed drugs include Retin-A, Metronidazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Susan Gass, M.D. accept Medicare? ▼
Susan Gass, M.D. appears in CMS Medicare data with 100 Part D claims and 40 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Susan Gass, M.D.'s credentials? ▼
Susan Gass, M.D.'s NPI is 1184738122 with credentials M.D.. 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.