2026 NPPES data Physician Assistant NPI 1477720423 PHYSICIAN ASSISTANT
Verify on CMS →

Tracy Mulder, PHYSICIAN ASSISTANT

Physician Assistant in Grandville, Michigan. 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
4K
Medicare Part D claims · 439 beneficiaries · Physician Assistant avg: 790
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

Tracy Mulder, PHYSICIAN ASSISTANT filed 3,715 Medicare Part D claims in 2023 as a Physician Assistant in Grandville, Michigan, prescribing 88% generic.

4K
Part D claims, 2023
88%
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.

Tracy Mulder, PHYSICIAN ASSISTANT's Medicare Part D volume vs every U.S. prescriber

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

3,715 Top 9% higher than 91% of 1,370,886 prescribers

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

Quality data not reported

NPI registry status

Active

Issued 05/09/2008

NPI 1477720423

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

3,715 370% 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

Physician Assistant share within Michigan

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

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).

Tracy Mulder, PHYSICIAN ASSISTANT appears in the CMS NPPES registry as a Physician Assistant provider holding PHYSICIAN ASSISTANT credentials at 3380 44TH ST SW, Grandville, MI, 49418, with a listed phone of (616) 685-8250. NPI 1477720423 was issued on 05/09/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Mulder 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 3,715 prescription claims written by this provider, covering 439 Medicare beneficiaries and totaling roughly $329K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 0.7%. 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

3380 44TH ST SW
Grandville, MI 49418

Provider Details

NPI 1477720423
Specialty Physician Assistant
Credentials PHYSICIAN ASSISTANT
Gender Female
NPI Issued 05/09/2008

Hospital and facility affiliations

Facilities where Tracy Mulder, PHYSICIAN ASSISTANT 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.

Advantage Health/saint Mary's Medical Group
Caledonia, MI
Center For Physical Rehabilitation And Therapy LP
Grand Rapids, MI
Center For Physical Rehabilitation Inc
Grand Rapids, 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 Tracy Mulder, PHYSICIAN ASSISTANT. To verify Tracy Mulder, PHYSICIAN ASSISTANT'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

Tracy Mulder, PHYSICIAN ASSISTANT — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 3,715 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.

3,715
Total Claims
$329K
Total Drug Cost
439
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
8,935
Total Day Supply
260,749
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$252K
Generic Drug Cost
$76K
Opioid Claims
27 (0.7% rate)
Antibiotic Claims
108

Patient Demographics

Average Patient Age
70.9 years
Avg HCC Risk Score
0.98
Gender Split
74% female / 26% male
Age Distribution
<65: 54, 65-74: 251, 75-84: 107, 85+: 27

Top Prescribed Drugs (Medicare Part D)

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

What Tracy Mulder, PHYSICIAN ASSISTANT prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
300
Lisinopril
203
Levothyroxine Sodium
184
Omeprazole
161
Amlodipine Besylate
156
Hydrochlorothiazide
143
Losartan Potassium
135
Metoprolol Succinate
98
Rosuvastatin Calcium
79
Citalopram Hbr
Citalopram Hydrobromide
64

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

Physician Assistant Overview

How Tracy Mulder, PHYSICIAN ASSISTANT fits within the Physician Assistant landscape nationally.

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

Tracy Mulder, PHYSICIAN ASSISTANT's 3,715 claims are above 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 Mulder.

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 Tracy Mulder, PHYSICIAN ASSISTANT's specialty?
Tracy Mulder, PHYSICIAN ASSISTANT specializes in Physician Assistant and practices in Grandville, Michigan. Credentials: PHYSICIAN ASSISTANT.
How much does Tracy Mulder, PHYSICIAN ASSISTANT prescribe under Medicare Part D?
In 2023, Tracy Mulder, PHYSICIAN ASSISTANT wrote 3,715 Medicare Part D claims totaling $329K in drug costs for 439 beneficiaries.
Where is Tracy Mulder, PHYSICIAN ASSISTANT located?
Tracy Mulder, PHYSICIAN ASSISTANT is located at 3380 44TH ST SW, Grandville, MI, 49418. Phone: (616) 685-8250.
What is Tracy Mulder, PHYSICIAN ASSISTANT's NPI number?
Tracy Mulder, PHYSICIAN ASSISTANT's National Provider Identifier (NPI) is 1477720423, issued on 05/09/2008.
Does Tracy Mulder, PHYSICIAN ASSISTANT prescribe more brand-name or generic drugs?
Tracy Mulder, PHYSICIAN ASSISTANT's prescribing is 12% brand-name and 88% generic drugs by claim count, with $252K in brand drug costs.
Does Tracy Mulder, PHYSICIAN ASSISTANT prescribe opioids?
Yes, Tracy Mulder, PHYSICIAN ASSISTANT had 27 opioid claims in 2023 with an opioid prescribing rate of 0.7%.
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 Tracy Mulder, PHYSICIAN ASSISTANT prescribe most often?
Based on 2023 Medicare Part D data, Tracy Mulder, PHYSICIAN ASSISTANT's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tracy Mulder, PHYSICIAN ASSISTANT accept Medicare?
Tracy Mulder, PHYSICIAN ASSISTANT appears in CMS Medicare data with 3,715 Part D claims and 439 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tracy Mulder, PHYSICIAN ASSISTANT's credentials?
Tracy Mulder, PHYSICIAN ASSISTANT's NPI is 1477720423 with credentials PHYSICIAN ASSISTANT. 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