NPI registry status
Active
2026 NPPES data Enterostomal Therapy Registered Nurse NPI 1083114508 FNP-BC
Verify on CMS → Denise Mah, FNP-BC
Enterostomal Therapy Registered Nurse in Fontana, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 88 in Enterostomal Therapy Registered Nurse, 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
61
Medicare Part D claims · 21 beneficiaries · Enterostomal Therapy Registered Nurse avg: 261
MIPS score
99.1/100
▲ 16 pts above national avg 83.5 · Exceptional
Industry payments
$137.91
6 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Denise Mah, FNP-BC reported a CMS MIPS final score of 99.1/100 - above the 83.5 national average - and filed 61 Medicare Part D claims in 2024.
- 99.1/100
- MIPS score · +16 vs avg
- 61
- Part D claims, 2024
- $137.91
- industry payments (Sunshine Act)
- ≥91st
- pct among measured MIPS (lower-bound band)
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.
Federal trust snapshot
What official records show about Denise Mah, FNP-BC
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1083114508), first enumerated 02/21/2018.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 61 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 99.1/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$137.91 in reported industry payments (6 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Denise Mah, FNP-BC's individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1083114508 · Enterostomal Therapy Registered Nurse
NPI-10 · ENUM-RECENT · TAX-TRACE · MIPS-ELITE · RX-TRACE · BOOK-THIN · PHOTO-FINISH
- NPI-10 1083114508
- ENUM-RECENT 2018
- TAX-TRACE 88
- MIPS-ELITE 99.1/100
- RX-TRACE 61
- BOOK-THIN 14 in California
- PHOTO-FINISH Kathleen Judge, NP-C · ±0.9
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Naomi Bach · low…
Naomi Bach
77 MIPS pts
- Janice Colwell, …
Janice Colwell, RN,MS,CWOCN
97.7 MIPS pts
- Mah · this provi…
Mah · this provider
99.1 MIPS pts
- Kathleen Judge, …
Kathleen Judge, NP-C
100 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Denise Mah, FNP-BC's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
99 ≥ 91st percentile 91% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
What does the federal data show about Denise Mah, FNP-BC?
High performer (top quartile)Primary specialty
Enterostomal Therapy Registered Nurse
Medicare Part D claims
61 77% vs specialty avg
MIPS final score
99.1/100 15.6 pts vs avg
Specialty distribution in California
How Enterostomal Therapy Registered Nurse compares to other specialties among California providers
Medicare quality performance, MIPS
Denise Mah, FNP-BC's 2023 MIPS final score plotted against the Enterostomal Therapy Registered Nurse national average
- MIPS Final Score
- 99.1/100
- vs 83.5 national avg · 2023 performance year
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).
Practice Address
Provider Details
| NPI | 1083114508 |
|---|---|
| Specialty | Enterostomal Therapy Registered Nurse |
| Credentials | FNP-BC |
| Gender | Female |
| NPI Issued | 02/21/2018 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
99.1275
Final Score
Measured-score avg: 83.5
85.2396
Quality
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Denise Mah, FNP-BC 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.
City OF Hope Medical Foundation
Duarte, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Denise Mah, FNP-BC. Source: openpaymentsdata.cms.gov.
Total received
$138
Largest payer
Urgo Medical North America, LLC
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Denise Mah, FNP-BC. To verify Denise Mah, FNP-BC's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
61
Total Claims
$6K
Total Drug Cost
21
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 64.667
- Total Day Supply
- 1,013
- Generic Drug Cost
- $420
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 71.5 years
- Avg HCC Risk Score
- 3.38
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Mupirocin | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Enterostomal Therapy Registered Nurse in CA →
All providers in California →
Compare specialties →
Enterostomal Therapy Registered Nurse Overview
How Denise Mah, FNP-BC fits within the Enterostomal Therapy Registered Nurse landscape nationally.
88
Enterostomal Therapy Registered Nurse Providers in US
29
States with Enterostomal Therapy Registered Nurse
261
Avg Claims per Provider
Denise Mah, FNP-BC's 61 claims are below the specialty average of 261.
Nationwide Enterostomal Therapy Registered Nurse peers with similar MIPS or enrollment year
Two federal-record peer sets for Mah, both outside California so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (99.1 here).
Same NPPES enumeration year (2018)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Enterostomal Therapy Registered Nurse Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Mah.
One of 14 Enterostomal Therapy Registered Nurse providers enrolled in California, 5 are shown here.
Victor Alterescu
R.N.
Oakland, CA
Dr. Barbara Bates-Jensen
PHD, RN
Sepulveda, CA
Harvey Darnell
RN, CWOCN
San Jose, CA
Linda Edgar
RN WOCN
Long Beach, CA
Kathleen Gibson
RN, CNS, CWOCN
Stockton, CA
Compare Enterostomal Therapy Registered Nurse nationally: see state-by-state distribution →
Frequently Asked Questions
What is Denise Mah, FNP-BC's specialty? ▼
Denise Mah, FNP-BC specializes in Enterostomal Therapy Registered Nurse and practices in Fontana, California. Credentials: FNP-BC.
How much does Denise Mah, FNP-BC prescribe under Medicare Part D? ▼
In 2024, Denise Mah, FNP-BC wrote 61 Medicare Part D claims totaling $6K in drug costs for 21 beneficiaries.
What is Denise Mah, FNP-BC's Medicare quality score? ▼
Denise Mah, FNP-BC has a CMS MIPS Final Score of 99.1/100 (Quality: 85.2). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Denise Mah, FNP-BC located? ▼
Denise Mah, FNP-BC is located at 9961 SIERRA AVE, Fontana, CA, 92335. Phone: (909) 396-7812.
What is Denise Mah, FNP-BC's NPI number? ▼
Denise Mah, FNP-BC's National Provider Identifier (NPI) is 1083114508, issued on 02/21/2018.
How many Enterostomal Therapy Registered Nurse providers are there in the US? ▼
There are 88 Enterostomal Therapy Registered Nurse providers across 29 states in the US. The average Enterostomal Therapy Registered Nurse provider writes 261 Medicare Part D claims per year.
What drugs does Denise Mah, FNP-BC prescribe most often? ▼
Based on 2024 Medicare Part D data, Denise Mah, FNP-BC's most frequently prescribed drugs include Mupirocin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Denise Mah, FNP-BC accept Medicare? ▼
Denise Mah, FNP-BC appears in CMS Medicare data with 61 Part D claims and 21 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Denise Mah, FNP-BC's credentials? ▼
Denise Mah, FNP-BC's NPI is 1083114508 with credentials FNP-BC. 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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 August 2026 (NPPES) / 2024 (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
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 August 2026.