2026 NPPES data Physician Assistant NPI 1558821785 PA-C
Verify on CMS →

Alexa Tremmel, PA-C

Physician Assistant in Ypsilanti, Michigan. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers — including 149,975 in Physician Assistant, 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
178
Medicare Part D claims · 72 beneficiaries · Physician Assistant avg: 790
Generic prescribing
81%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Alexa Tremmel, PA-C filed 178 Medicare Part D claims in 2023 as a Physician Assistant in Ypsilanti, Michigan, prescribing 81% generic.

178
Part D claims, 2023
81%
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.

Alexa Tremmel, PA-C's Medicare Part D volume vs every U.S. prescriber

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

178 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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

What does the federal data show about Alexa Tremmel, PA-C?

Quality data not reported

NPI registry status

Active

Issued 03/22/2019

NPI 1558821785

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

178 77% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Michigan

How Physician Assistant compares to other specialties among Michigan providers

Michigan providers

Largest specialties in Michigan (% of in-state providers)

Behavior Technician — 21.4%Behavior Technician21.4%Clinical Social Worker — 5.8%Clinical Social Worker5.8%Student in an Organized Health Care Education/Training Program — 3.6%Student in an Organized Health Care Education/Training Program3.6%Physical Therapist — 3.4%Physical Therapist3.4%Social Worker — 3.4%Social Worker3.4%Pharmacist — 3%Pharmacist3%Physician Assistant — 2.3%Physician Assistant2.3%
Largest specialties in Michigan (% of in-state providers)

Specialty board-certification context

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

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

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

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

Alexa Tremmel, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 5301 MCAULEY DR STE 2199, Ypsilanti, MI, 48197, with a listed phone of (734) 712-8676. NPI 1558821785 was issued on 03/22/2019. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Tremmel 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 178 prescription claims written by this provider, covering 72 Medicare beneficiaries and totaling roughly $11K in drug spend, split 12% brand-name and 81% 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.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 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

5301 MCAULEY DR STE 2199
Ypsilanti, MI 48197

Provider Details

NPI 1558821785
Specialty Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 03/22/2019

Hospital and facility affiliations

Facilities where Alexa Tremmel, PA-C 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.

Iha Health Services Corporation
Livonia, MI

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

License & disciplinary context — Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 — they are NOT specific to Alexa Tremmel, PA-C. To verify Alexa Tremmel, PA-C's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases

MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

Alexa Tremmel, PA-C — brand share 12.0%
Physician Assistant average

12% brand-name claims vs 81% generic, on 178 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.

178
Total Claims
$11K
Total Drug Cost
72
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
181
Total Day Supply
3,755
Brand vs Generic
12% brand / 81% generic
Brand Drug Cost
$9K
Generic Drug Cost
$1K
Antibiotic Claims
18

Patient Demographics

Average Patient Age
75.8 years
Avg HCC Risk Score
2.21
Gender Split
63% female / 38% 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
Pantoprazole Sodium
12

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

Physician Assistant Overview

How Alexa Tremmel, PA-C fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

Alexa Tremmel, PA-C's 178 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in Michigan

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

Compare Physician Assistant 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 Michigan medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Physician Assistant 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.

Frequently Asked Questions

What is Alexa Tremmel, PA-C's specialty?
Alexa Tremmel, PA-C specializes in Physician Assistant and practices in Ypsilanti, Michigan. Credentials: PA-C.
How much does Alexa Tremmel, PA-C prescribe under Medicare Part D?
In 2023, Alexa Tremmel, PA-C wrote 178 Medicare Part D claims totaling $11K in drug costs for 72 beneficiaries.
Where is Alexa Tremmel, PA-C located?
Alexa Tremmel, PA-C is located at 5301 MCAULEY DR STE 2199, Ypsilanti, MI, 48197. Phone: (734) 712-8676.
What is Alexa Tremmel, PA-C's NPI number?
Alexa Tremmel, PA-C's National Provider Identifier (NPI) is 1558821785, issued on 03/22/2019.
Does Alexa Tremmel, PA-C prescribe more brand-name or generic drugs?
Alexa Tremmel, PA-C's prescribing is 12% brand-name and 81% generic drugs by claim count, with $9K in brand drug costs.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Alexa Tremmel, PA-C prescribe most often?
Based on 2023 Medicare Part D data, Alexa Tremmel, PA-C's most frequently prescribed drugs include Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alexa Tremmel, PA-C accept Medicare?
Alexa Tremmel, PA-C appears in CMS Medicare data with 178 Part D claims and 72 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alexa Tremmel, PA-C's credentials?
Alexa Tremmel, PA-C's NPI is 1558821785 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

Compiled from official public sources by the PlainDoctor editorial team.