NPI registry status
Active
2026 NPPES data Procedural Dermatology Physician NPI 1982044012 M.D.
Verify on CMS → Ammon Larsen, M.D.
Procedural Dermatology Physician in Loveland, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 679 in Procedural 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
999
Medicare Part D claims · 360 beneficiaries · Procedural Dermatology Physician avg: 664
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
▼ 8 pts below national avg 83.1 · Above neutral
Industry payments
$126.2K
292 payments · CMS Open Payments (Sunshine Act)
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
Ammon Larsen, M.D. reported a CMS MIPS final score of 75/100 - below the 83.1 national average - and filed 999 Medicare Part D claims in 2023.
- 75/100
- MIPS score · -8 vs avg
- 999
- Part D claims, 2023
- 76%
- 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.
Ammon Larsen, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
75 15th percentile higher than 15% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Ammon Larsen, M.D. sits
This provider among procedural dermatology physician peers
Across the 302 procedural dermatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ammon Larsen, M.D. writes more Part D claims than 67% of them and scores higher on MIPS quality than 21% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one procedural dermatology physician peer from a representative sample of 60; the gold marker is Ammon Larsen, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ammon Larsen, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Ammon Larsen, M.D.?
Below national averagePrimary specialty
Procedural Dermatology Physician
Medicare Part D claims
999 50% vs specialty avg
MIPS final score
75/100 8.1 pts vs avg
Specialty distribution in Colorado
How Procedural Dermatology Physician compares to other specialties among Colorado providers
Medicare quality performance, MIPS
Ammon Larsen, M.D.'s 2023 MIPS final score plotted against the Procedural Dermatology Physician national average
- MIPS Final Score
- 75/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Procedural Dermatology Physician) - 75/100 vs national avg 83.1
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).
Ammon Larsen, M.D. appears in the CMS NPPES registry as a Procedural Dermatology Physician provider holding M.D. credentials at 3451 MOUNTAIN LION DR, Loveland, CO, 80537, with a listed phone of (970) 800-9330. NPI 1982044012 was issued on 07/03/2013.
Medicare Part D records for calendar year 2023 show 999 prescription claims written by this provider, covering 360 Medicare beneficiaries and totaling roughly $1.6 million in drug spend, split 24% brand-name and 76% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 75/100 for the 2023 performance year, compared with the national average of 83.1.
Procedural Dermatology Physician is a narrow specialty nationwide, with 679 enrolled providers across 48 states and an average of 664 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 | 1982044012 |
|---|---|
| Specialty | Procedural Dermatology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/03/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
Avg: 83.1
Reporting: Group practice
Hospital and facility affiliations
Facilities where Ammon Larsen, M.D. 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.
Monarch Dermatology And Surgery LLC
Sterling, 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).
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 Ammon Larsen, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$126.2K
Largest payer
ABBVIE INC.
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.
Brand vs generic prescribing mix · Typical
Ammon Larsen, M.D. - brand share 24.0%
Procedural Dermatology Physician average
24% brand-name claims vs 76% generic, on 999 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.
999
Total Claims
$1.6M
Total Drug Cost
360
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,132
- Total Day Supply
- 29,572
- Brand vs Generic
- 24% brand / 76% generic
- Brand Drug Cost
- $1.5M
- Generic Drug Cost
- $39K
- Antibiotic Claims
- 47
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 1.17
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 40, 65-74: 168, 75-84: 112, 85+: 40
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ammon Larsen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clobetasol Propion…
Clobetasol Propionate
180 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
123 claims
- Dupixent Pen
Dupixent Pen
87 claims
- Mupirocin
Mupirocin
76 claims
- Ketoconazole 58
Ketoconazole
58 claims
- Metronidazole 36
Metronidazole
36 claims
- Doxycycline Hyclate 35
Doxycycline Hyclate
35 claims
- Humira(Cf) Pen 31
Humira(Cf) Pen
31 claims
| Drug | Claims |
|---|---|
| Clobetasol Propionate | 180 |
| Triamcinolone Acetonide | 123 |
| Dupixent Pen Dupilumab | 87 |
| Mupirocin | 76 |
| Ketoconazole | 58 |
| Metronidazole | 36 |
| Doxycycline Hyclate | 35 |
| Humira(Cf) Pen Adalimumab | 31 |
| Hydrocortisone | 22 |
| Tacrolimus | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Procedural Dermatology Physician Overview
How Ammon Larsen, M.D. fits within the Procedural Dermatology Physician landscape nationally.
679
Procedural Dermatology Physician Providers in US
48
States with Procedural Dermatology Physician
664
Avg Claims per Provider
Ammon Larsen, M.D.'s 999 claims are above the specialty average of 664.
Nearby Procedural Dermatology Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Larsen.
Dr. Lawrence Barfield
DO
Westminster, CO
Dr. Mary Brady
M.D.
Lakewood, CO
Dr. Bradley Draper
MD
Highlands Ranch, CO
Dr. John Fueston
M.D.
Longmont, CO
Dr. Theresa Pacheco
MD
Aurora, CO
Compare Procedural 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 Colorado medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Procedural 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.
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Frequently Asked Questions
What is Ammon Larsen, M.D.'s specialty? ▼
Ammon Larsen, M.D. specializes in Procedural Dermatology Physician and practices in Loveland, Colorado. Credentials: M.D..
How much does Ammon Larsen, M.D. prescribe under Medicare Part D? ▼
In 2023, Ammon Larsen, M.D. wrote 999 Medicare Part D claims totaling $1.6M in drug costs for 360 beneficiaries.
What is Ammon Larsen, M.D.'s Medicare quality score? ▼
Ammon Larsen, M.D. has a CMS MIPS Final Score of 75/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ammon Larsen, M.D. located? ▼
Ammon Larsen, M.D. is located at 3451 MOUNTAIN LION DR, Loveland, CO, 80537. Phone: (970) 800-9330.
What is Ammon Larsen, M.D.'s NPI number? ▼
Ammon Larsen, M.D.'s National Provider Identifier (NPI) is 1982044012, issued on 07/03/2013.
Does Ammon Larsen, M.D. prescribe more brand-name or generic drugs? ▼
Ammon Larsen, M.D.'s prescribing is 24% brand-name and 76% generic drugs by claim count, with $1.5M in brand drug costs.
How many Procedural Dermatology Physician providers are there in the US? ▼
There are 679 Procedural Dermatology Physician providers across 48 states in the US. The average Procedural Dermatology Physician provider writes 664 Medicare Part D claims per year.
What drugs does Ammon Larsen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ammon Larsen, M.D.'s most frequently prescribed drugs include Clobetasol Propionate, Triamcinolone Acetonide, Dupixent Pen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ammon Larsen, M.D. accept Medicare? ▼
Ammon Larsen, M.D. appears in CMS Medicare data with 999 Part D claims and 360 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ammon Larsen, M.D.'s credentials? ▼
Ammon Larsen, M.D.'s NPI is 1982044012 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.
- 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 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.